WW2 German Assault Guns

Gepanzerten Selbstfahrlafette für Sturmgeschütz 75 mm Kanone Ausführung B (Sturmgeschütz III Ausf.B)

Germany (1940)
Assault Gun – 300 to 320 Built

The concept of using mobile, well-armed, and well-protected infantry support vehicles was theorized in German military circles during the 1930s. Production limitations caused by the underdeveloped German military industry prevented the realization of this project for many years, and the production of tanks was seen as a higher priority. By May 1940, the first 30 vehicles, the StuG III Ausf.A, were ready for service and some even saw action against the Western Allies in France and the Low Countries. They quickly showed that this concept had merit and the Germans began a slow but steady increase in production. This led to the introduction of the StuG III Ausf.B version, a slight improvement over the Ausf.A, which had only been built in quite limited numbers.

The StuG III Ausf.B. Source: T.L. Jentz and H.L. Doyle Panzer Tracts No.8 Sturmgeschütz

The Road to the Sturmgeschütz III Ausf.B

Production of the first pre-series vehicles of the StuG III series was undertaken in 1937. These 0-series vehicles served mainly for evaluation and as testbeds and training vehicles. While a vehicle that could provide mobile fire support was deemed desirable by the German Army, the lagging industrial capacity was barely able to fulfill the needs of the Panzer divisions. It would take years before the first operational vehicles were actually produced. In October 1938, the Waffenamt (Eng. Ordnance Bureau) issued a production order for 280 vehicles. This included 30 vehicles of the Ausf.A series, and 250 vehicles of the Ausf.B version (chassis numbers 90101 to 90400).

The first production order of 30 vehicles (Ausf.A version) was barely completed by the time of the planned German offensive against the Western Allies in May 1940. Surprisingly, their overall combat performance was not documented by the Germans and was even hardly mentioned in the sources. Only one StuG III Ausf.A was reported to have been lost, but it was recovered and repaired. The performance of the StuG III in France was deemed a success, and the Army officials demanded the production numbers of the newer version be increased. As a result, the previous order of 250 StuG III Ausf.Bs was increased by 50 (chassis numbers 90501 to 90550).

The StuG III Ausf.A, which was visually almost identical to the later Ausf.B version. Source: Anderson Sturmartillerie

Even for famous vehicles, such as the StuG III, sources disagree on how many were built. The previously mentioned numbers are provided by Walter J. Spielberger in Sturmgeschütz and its Variants. T.L. Jentz and H.L. Doyle (Panzer Tracts No.8 Sturmgeschütz) also provide the same figures. On the other hand,  D. Nešić in Naoružanje Drugog Svetsko Rata-Nemačka suggests a slightly higher number, at 320. The difference of 20 vehicles may be explained by the fact that around 20 Ausf.A/B hybrid vehicles were also constructed.

The second StuG version is known as the Gepanzerten Selbstfahrlafette fur Sturmgeschütz 75 mm Kanone Ausführung B, or more simply, as StuG III Ausf.B. It was more or less the same vehicle as the previous version. Nevertheless, some changes were implemented to improve the shortcomings noted on the Ausf.A. The StuG III Ausf.B was to be built using Panzer III Ausf.G and H series hulls. The first production run of 250 vehicles began in July 1940 and ended in March 1941. The remaining 50 were completed between March and April (or May depending on the source) 1941. The production was carried out by Alkett instead of Daimler-Benz. Alkett would remain the factory that would produce the bulk of StuG III vehicles until later in the war, when M.A.N and MIAG joined the production.

Organization and Distribution to the Units 

In the early years of the war, due to the quite limited German mobilized industrial capability, the production of new StuG III vehicles was slow. For example, during the German offensive against France and its Allies in May 1940, the only 24 available StuGs were distributed to four batteries: the 640th, 659th, 660th, and 665th. Due to a limited number of available vehicles, the Germans were forced to deploy them in small sturmartillerie batterie (Eng. assault gun battery). These were divided into three zuge (Eng. platoons), each equipped with only two vehicles. In time, as more StuG IIIs became available, their unit strength was increased to abteilungen (Eng. battalion) strength of 18 vehicles. These battalions were divided into three batteries, each 6 vehicles strong. These would be further reinforced with three additional vehicles which were allocated to the platoon commanders.

Just prior to the May 1940 offensive, the Waffen-SS, a military branch of the Nazy Party, was slowly forming its first larger combat formations. The leader of this formation, Heinrich Himmler, wanted the best weapons available for the LSSAH (Leibstandarte SS Adolf Hitler) Division. This Division was formed by combining the three SS regiments, Deutschland, Der Fuhrer, and Germania. Himmler himself urged for the creation of SS assault batteries. He received a response on 7th May 1940 from the Oberkommando des Heeres (Eng. High Command of the German Army). In this letter, Himmler was informed that, due to shortages of weapon availability even for the Army, the SS formation was to receive few heavy weapons. This, however, included a unit of four StuG III vehicles. There is a mention of a reduction of the number of vehicles per batterie from 6 to 4 StuG III.

Despite the lack of trust of the German Army towards the SS, given their connections to the Führer himself, it could do little but comply. The LSSAH would receive its StuG III vehicles during May 1940. As crews for these were still undergoing training, they would not see action on the Western Front.

Thanks to the increased production of the Ausf.B and later versions, it became possible to increase the size of the assault batteries to battalion size by summer 1940. In 1941, it became possible to equip more batteries with a command vehicle, replacing the Sd.Kfz.253 in this role. Even with the increased production of StuG IIIs, these still remained part of independent units that would be attached to other infantry units depending on the needs. The first exception to this rule was the Grossdeutschland Regiment which, after the Western campaign ended, permanently received the 640th Battery. The Waffen SS once again tried to receive a large number of the StuG IIIs permanently allocated to them. In this early stage, they had to be content with receiving a battery of only six vehicles. An increase of the number of batteries per Waffen SS division was initiated at the end of 1941, but it took some time to be fully implemented.


While visually quite similar to the Ausf.A, the new Ausf.B incorporated some minor changes that can help distinguish between these two versions. It is important to note that some changes were not implemented on all vehicles, and having elements from both versions on the same vehicle was not that uncommon. The StuG III series was based on the Panzer III chassis and shared many components mainly related to the hull and suspension’s design. In the case of the StuG III Ausf.B, it was based upon the Panzer III Ausf.G and H tank chassis.

The Panzer III Ausf.H served as a base for the StuG III Ausf.B vehicles. Source:

The Hull

The StuG III Ausf.B’s hull could be divided into three major sections: the forward-mounted transmission, central crew compartment, and rear engine compartment. The front hull was where the transmission and steering systems were placed and it was protected with an angled armor plate. The two square-shaped, two-part hatch brake inspection doors were located on the front hull.

Above the protected front hull, where the transmission and steering systems were placed, two square-shaped, two-part hatch brake inspection doors were placed. While this vehicle is an Ausf.A version, the later Ausf.B did not receive any change to this part of the vehicle. Source:

The Suspension and Running Gear

The StuG III Ausf.B used a torsion bar suspension, like the previous version. In order to reduce the chance of accidentally throwing the track off, the first return roller was moved slightly to the front. In an attempt to increase the overall mobility of the vehicle, slightly wider tracks were used on the Ausf.B. They were widened from 380 to 400 mm. A wide rubber rim was added on the six doubled road wheels to increase their service life. Another visual change was the use of modified cast front drive wheels. Some vehicles retained the older type sprockets.

A close-up view of the Stug III Ausf.A suspension. Source:
An Ausf.B with the older type front sprocket used on the Ausf.A. Source:
This would be replaced with a new cast front drive wheel. Also, note the first return roller, which was moved further to the front. Source:

The Engine 

The Ausf.B was powered by a slightly modified twelve-cylinder, water-cooled Maybach HL 120 TRM engine providing 265 hp @ 2,600 rpm engine. The difference between this and the previous engine was the use of a new lubrication system.


Illustration of the Maybach HL 120 engine.Source: Walter J. Spielberger Sturmgeschütz and its Variants

The Transmission

The StuG III Ausf.A was equipped with an overly complicated ten forward and one reverse speed Maybach Variorex SRG 32 8 145 semi-automatic transmissions. While, in theory, it provided the Ausf.A with a maximum speed of up to 70 km/h, it was overcomplicated and prone to frequent breakdowns. Almost from the start, this showed itself to be unusable in the long run. As it proved too problematic, it was replaced with a much simpler SSG 76 transmission unit.

The Superstructure 

The box-shaped upper superstructure was mostly unchanged, with the exception of slightly modifying the top hatch design. Another small change was the deletion of the two rear-positioned storage boxes.

Top view drawings of the StuG III Ausf.A (top) and B (bottom). Notice the slight difference in the design of the gunner’s periscope hatches, located on the top left side, just behind the driver’s position. Source:T.L. Jentz and H.L. Doyle Panzer Tracts No.8 Sturmgeschütz

The Armor Protection

The StuG III Ausf.B’s armor protection was unchanged from the previous version. It was well protected, with a 50 mm thick frontal armor. The sides and rear were somewhat lighter, at 30 mm. One minor improvement regarding the Ausf.B’s protection was adding a metal cover for the nebelkerzenabwurfvorrichtung (Eng. smoke grenade rack system) which was positioned on the rear of the hull.

While a minor modification, the StuG III Ausf.B and later versions that used this system, received an armored cover for the smoke grenade rack system located to the rear of the vehicle. Source:

The Armament 

The main armament remained the same as in the previous version.. It consisted of a 7.5 cm StuK 37 L/24. As it was intended as a close support weapon, it had a rather low muzzle velocity. Despite this, it was a fairly accurate gun, with a 100% hit probability in action at ranges up to 500 m. The accuracy dropped to 73% at 1 km and to 38% at distances of over 1.5 km.

While it was primarily designed to engage fortified positions using a 7.5 cm Gr Patr high-explosive round weighing 5.7 kg (at a 420 m/s velocity), it was also fairly good for engaging enemy armor. This fact is often overshadowed by its close support role. The 7.5 cm PzGr patr was a 6.8 kg armor-piercing round with a muzzle velocity of 385 mps, and could pierce around 39 mm of 30° angled armor at distances of 500 m. The 7.5 NbGr Patr was a smoke-screen round. The 7.5 cm StuK 37 was equipped with a Rundblickfernrohr RblF 32 type panoramic gun sight.  The elevation of the gun -10° to +20°, while the traverse was limited to 12° per side. The ammunition load consisted of 44 rounds mostly stored in front of the loader. Additionally, an MP38 or 40 submachine gun was provided for crew protection.

While being a short barrel weapon, the 7.5 cm StuK 37 L/24 was quite an effective weapon when used against fortified positions and lightly armored tanks. The numerous kill marks on this vehicle is clearly an indicator of this. Source: /
The early-built StuG IIIs did not have a machine gun for self-defense against infantry. It was believed by the Germans that the StuG III would work in close cooperation with friendly infantry formations, which would provide sufficient firepower to overcome the enemy infantry. This proved not to be the case and later versions would receive a machine gun with a shield and even a remotely operated mount. The crew of this vehicle appears to have added a small improvised mount for a machine gun operated by the loader. Source: /

The Crew

The vehicle had a crew of four: commander, driver, loader, and gunner. While loaders were positioned to the right of the gun, the remaining crew were placed opposite them. Drivers were positioned on the left front side of the hull. Just behind them was the gunner, and right behind them were the commanders.

Due to the small size, there was only room for four crew members. While not perfect, it proved enough for its role. Source:

In Combat

In Yugoslavia

The StuG III Ausf.B first saw action during the Axis occupation of Yugoslavia and Greece in the Balkans. The war in the Balkans was initiated by the Italians during their failed invasion of Greece. Following the deterioration of their military situation, they asked their German allies for help. Counting on its Balkan allies and the neutrality of Yugoslavia, the German Army prepared for an invasion of Greece. The whole situation was complicated by the overthrowing of the Yugoslavian government on 27th March 1941 by pro-Allied military officers. Hitler was furious with this development and ordered that Yugoslavia be occupied.

For the upcoming Balkan campaign, only four assault gun battalions were available. These were the 184th and 197th, which were allocated to the 2nd Army, and the 190th and 191st allocated to the 12th Army. The 184th and 197th participated in the attack on Yugoslavia. They were meant to attack from Germany towards modern-day Slovenia and Croatia. Their advance was blocked, as the Yugoslavian Army had blown up many vital bridges. They would eventually cross towards Yugoslavia. Given the rapid collapse of the Yugoslavian Army, their combat use was likely limited. Nevertheless, at least two StuG IIIs were reported lost in Yugoslavia.

Four StuG III Ausf.Bs from the 184th Assault Gun Battalion in Slovenia on 12th April 1941. Source: Bojan B. Dumitrijević and Dragan Savić Oklopne jedinice na Jugoslovenskom ratištu
Probably the same vehicles somewhere in Croatia. Four. Source: D. Predoević, Oklopna vozila i oklopne postrojbe u drugom svjetskom ratu u Hrvatskoj

The other two assault gun batteries were stationed in Bulgaria. From there, they would cross the border to Greece and proceed to attack the Metaxa Line. Unfortunately, similar to the French campaign, their combat use in this operation is poorly documented by the Germans.

Documents from the 190th Assault Battalion mention some combat activity during the first few days of the campaign. The 190th Assault Battalion’s first combat engagement occurred on 6th April 1941, when they provided covering fire for the German infantry at Tchorbadshisko. This attack failed in front of the fortified Greek Army positions. The following day, after a heavy artillery bombardment, this position was taken. From 9th to 10th April, the 190th Assault Battalion helped clean up the remaining defending bunker positions before finally crossing the Nestos River.

The 191st Assault Battalion was tasked with supporting the 72nd Infantry Division. The main aim of this division was to take Rupel Pass. Given the strongly fortified positions and hilly terrain, the StuG IIIs could not be effectively used. The Germans could not overcome the strong enemy positions. By 9th April, the defenders abandoned their positions, which enabled the Germans to proceed through the enemy’s rear lines.

A StuG III Ausf.B from the 191st Battalion advancing through Greece. Source: T. Anderson Sturmartillerie Spierhead Of the Infantry

In the Soviet Union 

For the upcoming invasion of the Soviet Union, the Germans managed to form 12 assault gun battalions and 5 additional batteries equipped mainly with the Ausf.B versions, though also with smaller numbers of the Ausf.A and later C and D versions. These were divided into the three Heeresgruppen (Eng. army groups), Nord (Eng. North), Mitte (Eng. Centre), and Süd (Eng. South). Given as it was expected that the main effort was to be carried out by Army Group Centre. Eight assault battalions were allocated to this part of the front, the 177th, 189th, 191st, 192nd, 201st, 203th, 210th, and 226th. Army Group North received five batteries (659th, 660th, 665th, 666th, and 667th) supported by two battalions (184th and 185th). The remaining two battalions (190th and 197th) were later reinforced by the 202nd and 209th Battalions, working with Army Group South.

Despite expecting a quick Soviet Army collapse, this did not occur. Instead, the Germans started facing strong and stubborn enemy resistance. For example, in the case of the 184th Battalion, of its original 21 vehicles, only 16 were operational by 20th August 1941. Two StuG IIIs were completely destroyed and had to be replaced. In the case of the 203rd Battalion, a report dated 14th August 1941 mentioned that only one vehicle was lost, but it also mentioned that only between 33% to 66% of the vehicles were operational, and the remaining were out of action, waiting to receive new engines.

The StuG III, while not intended to engage enemy armor, could easily defeat Soviet light tanks thanks to their armor-piercing rounds that could penetrate some 34 mm of armor at 1 km. Besides seriously underestimating the enemy’s combat strength and resolve, the German intelligence office also failed to pick up on the new Soviet tank designs, the T-34 and the KV series. The StuG III’s armor-piercing round proved almost useless against the armor of these new tanks. In firing trials carried out on the Eastern Front in September 1941, it was found that the T-34’s front armor could not be penetrated when using the standard armor-piercing rounds. In rare and lucky cases, the turret’s front armor was penetrated. The side and rear were also immune to the German 7.5 cm armor-piercing rounds. The only vulnerable spot was the lower hull side, which could be easily penetrated. The high-explosive round was more effective. While it could not penetrate the thick enemy armor, it was strong enough to seriously damage the vehicle and its mechanical components.

Despite their impunity to German anti-tank guns, the Soviet tank crews were let down by poor leadership, poor logistics, poor maintenance, inexperience, and lack of spare parts. The 201st Battalion mentioned that, on 2nd October, at least two T-34-76 tanks began firing at a damaged StuG III vehicle. The German StuG began retreating back to warn others from the advancing enemy tanks. The two Soviet tanks followed the damaged StuG III.  The remaining StuG IIIs sprang to action and, after a brief engagement, the enemy T-34 tanks were destroyed.

A StuG III Ausf.B somewhere in the Soviet Union during 1941. While the wooden logs acted as improvised protection, their purpose was likely to help cross difficult obstacles. Source: /

The losses suffered in the war and the introduction of later improved versions ultimately led to the surviving Ausf.B’s being withdrawn back to Germany. Once there, they would mostly be allocated to training schools, such as the Sturmgeschütz Ersatz und Ausbildung Abteilung (Eng. Replacement and Training Battalion), which was stationed in Denmark during 1944 and had at least one Ausf.B in its inventory.

While being the best protected German vehicle in the early part of the war, the StuG III was not invincible and many were lost during 1941. Source: www.worldwarphotos
Different StuG IIIs (from B to G versions) from the Sturmgeschütz Ersatz und Ausbildung Abteilung located in Denmark 1944. Source: T. Anderson Sturmartillerie Spierhead Of the Infatry

In Soviets Hands

The fighting in the Soviet Union was harsh for both sides which often led to huge losses in men and materials. To compensate for their loss of equipment, the Germans and the Soviets would often reuse captured vehicles. The Soviets operated at least one captured StuG III Ausf.B vehicle, which belonged to the 197th Assault Gun Battalion.

A StuG III Ausf.B in Soviet hands. Source:


StuG III Ausf.A/B Hybrids

Due to frequent delays in production, largely due to the introduction of the new transmission on the Panzer III and as there were no new available chassis, some 20 additional StuG III Ausf.A variant were built using superstructures intended for the StuG III Ausf.B version.

The unusual StuG III Ausf.A/B hybrid, used as a replacement for the delayed production of the later Ausf.B series. Source: T.L. Jentz and H.L. Doyle (199) Panzer Tracts No.8 Sturmgeschütz

Sturminfanteriegeschütz 33 

Due to the need to fight the well-entrenched Soviet positions at Stalingrad, the Germans hastily modified some 24 StuG III vehicles for this role. The modification was simple, as the original StuG III superstructure was replaced with a new box-shaped one armed with a 150 mm gun. The first prototype was based on the StuG III Ausf.B chassis. Some of the 24 rebuilt Sturminfanteriegeschütz 33 (English: assault infantry gun) used components taken from the StuG III Ausf.A and B.

This particular vehicle uses the front drive wheel of an Ausf.A with a combination of moving return roller and wider tracks of the Ausf.B. Source: T.L. Jentz and H.L. Doyle (2006) Panzer Tracts No.9-1 Sturmpanzer

Remote Control Tank

At least one StuG III Ausf.B was modified as a Leitpanzer (English: control tank) used to remotely control and carry the small Landungsträger (English: demolition charge carrier). For this variant, the gun was removed and improved radio equipment with a large 2 m long rod antenna was added.

At least one StuG III Ausf.B was modified as a Leitpanzer. Source: T. Anderson Sturmartillerie Spierhead Of the Infantry

Fahrschul Sturmgeschütz

An unknown number of StuG III Ausf.Bs were used as training vehicles. Their role was highly important, as the inexperienced and untrained crews had little combat potential on the battlefields.

This StuG IIII Ausf.B was used as a training vehicle. Note the sign Fahrschule (Eng. driving school) painted on the right front side of the superstructure. This particular vehicle is quite interesting, as its opening on the superstructure’s top left was completely enclosed. Source: T.L. Jentz and H.L. Doyle Panzer Tracts No.8 Sturmgeschütz


Like its predecessor, the StuG III Ausf.B also showed that the assault gun concept was a success. From the technical side, it resolved some mechanical issues present on the Ausf.A, but also improved the mobility to some extent. It was also built in much greater numbers, enabling the Germans to form additional StuG units. While it would ultimately be replaced with improved versions, some of the Ausf.B’s remained in use up to the end of the war.

StuG III Ausf.B Balkans, April 1941. Illustration made by David B.
Ausf.B, Russia, winter 1941-42. Illustration made by David B.

StuG III Ausf.B specifications

Dimensions (L-W-H) 5.38 x 2.92 m x1.95 m
Total Weight 20.7 tonnes
Crew 4 (Commander, Gunner, Loader, and Driver)
Speed 40 km/h, 20 km/h (cross-country)
Range 160 km, 100 km (cross-country)
Armament 7.5 cm L/24
Armor 10-50 mm
Engine Maybach 120 TRM 265 hp @ 2,000 rpm
Total Production 300 to 320




WW2 German Assault Guns

Gepanzerten Selbstfahrlafette fur Sturmgeschütz 75 mm Kanone (Sturmgeschütz III Ausf.A)

Germany (1940)
Assault Gun – 30 Built + 6 to 20 Ausf.A/B Hybrids

Prior to and during the Second World War, the Germans developed and introduced into service a series of armored vehicles. While most of these were tanks, there were also a number of modifications designed to fulfill different roles, such as anti-tank or anti-aircraft duties. During the early stages of the war, a new vehicle, known as the Sturmgeschütz III, was slowly being introduced. Its purpose was to provide close fire support to infantry units, a role in which it would perform superbly. While mostly overshadowed by the famous Panther and Tiger tanks, the small and cheap Sturmgeschütz III would become the most widely produced tracked vehicle in the German armored arsenal. Its entry into service in 1940 was rather modest, mostly due to the small numbers of vehicles available at that time, but this was something that would change dramatically in the war’s later years.

Gepanzerten Selbstfahrlafette fur Sturmgeschütz 75 mm Kanone Ausführung A. Source:

Sturmgeschütz III Development History

During the Great War, the Western front was bogged down in trench warfare, where fast movement was limited due to the terrain and fortified defenses. In order to break the stalemate, the Germans began employing the so-called Sturmtruppen (Eng. Stormtroopers). These were infantry units that put great emphasis on speed and sudden attacks in order to overwhelm the enemy’s defensive line. In order to support them, towed artillery was used. The close fire support was a welcome addition during an assault, destroying enemy targets like machine-gun emplacements and fortified positions. However, the use of the artillery in this role was hampered by the crews being exposed to enemy return fire and the guns being too cumbersome to move over the rough terrain.

After the war, German Army military officials were quite aware that failing to provide the infantry with adequate close-range fire support would lead to high losses during attacks on enemy entrenched positions. Mobile artillery was seen as a solution to this problem. In 1927, the German Reichswehrministerium (Ministry of Defense) issued a contract for a self-propelled vehicle armed with a 77 mm gun mounted on an experimental Hanomag WD fully tracked tractor. Work on this vehicle had to be stopped due to a number of reasons, like lack of funds and priority being given to other military projects and reorganization.

The 77 mm gun-armed Hanomag WD tracked tractor. Source: Pinterest

Nevertheless, this concept was not completely abandoned, and work on it reemerged in the early 1930s. This was mainly thanks to Erich von Manstein. He argued for the introduction of a highly mobile, well-protected, and well-armed self-propelled artillery gun. Such vehicles were meant to provide infantry with mobile close fire support during combat operations. Thanks to the self-propelled chassis, these could be quickly redeployed to respond to any new threat. Towed artillery, on the other hand, was often vulnerable to enemy return fire and needed time to change positions. This self-propelled artillery gun was to be an organic part of standard infantry divisions, divided into three 6 vehicle strong batteries.

While initially opposed by some elements of the German Army, the project received a green light when it was approved by Oberbefehlshaber des Heeres (German Commander in Chief of the Army), Generaloberst von Fritsch, in 1935. The project was to be carried out under the supervision of Colonel Walter Model. The whole project started at a very slow pace, and it took a year for things to finally get going.

Whose Responsibility Was It? 

While the first steps in the creation of such a vehicle were underway, there was a disagreement between the different Army branches, including artillery, infantry, and armor, about this project. While the value of such a vehicle was greatly praised by both infantry and artillery units, military circles that advocated for the use of tanks were less enthusiastic. The main issue that arose was the question of what was the difference between a tank that could fulfill the same role and the proposed self-propelled artillery gun. There was also the question of whether it was worth it to spend the limited production resources on developing both types of vehicles.

In order to find answers to these questions, in early June 1936, an unnamed general in the infantry branch General der Infanterie sent a dispatch to the General Staff of the Army. In it, he noted that, while such a vehicle offered clear advantages over ordinary towed artillery, it was necessary to establish an accurate draft of the requirements for its design and of its tactical usage in combat. Furthermore, he explained at length that it was necessary to make a clear line between the roles that tanks and infantry support guns should fulfill. While their combat role seemed to be quite similar at first glance, they were in fact different.

While the tank force was seen as the main offensive formation, the infantry was meant to follow up and destroy the remaining isolated enemy forces. On the other hand, infantry saw the tanks as support weapons and would request that part of the tanks be left behind to provide close support. This in turn would weaken the tank formations, robbing them of their numbers and firepower. The tanks were an offensive weapon that relied on speed and mobility to attack less defended positions. Fortified targets could not be taken by tanks alone, and they had to be accompanied by infantry. The assault vehicles, on the other hand, thanks to their mobility, armor, and firepower could easily support the infantry. It was not a weapon to be used en masse, but instead, used in smaller numbers as needed.

While other nations, like France, advocated for the use of tanks as primarily infantry support weapons, the Germans also tested this idea. In August 1936, this was discussed by the German General Staff of the Army, but the idea was quickly discarded. They argued that, in order for tanks to fulfill this role, tank armor had to be constantly upgraded to keep up with the development of anti-tank weapons. Adding additional armor would cause the tank to lose its mobility and its tactical offensive advantages.

The generals from the panzer divisions were against the assault gun project. To them, introducing a new vehicle would put enormous stress on the overburdened German production industry. The production of new tanks, like the Panzer III and IV, was limited at best. But, despite their resistance, in the end, it was decided that the artillery branch would be responsible for training and developing tactics for this vehicle.

First Requirements

What followed was a period of design and development requirement negotiation. The requirements were finalized and issued on military document 449/36 dated 15th June 1936. The list of requirements was initially designated schwere Panzerabwehrkanone sPaK (Eng. heavy anti-tank gun). It had to have a small height, no more than a standing soldier. The main armament would consist of a 7.5 cm gun facing forward. It had to have sufficient elevation to reach a 7 km firing distance. Elevation had to be 30° in both directions. In addition, it had to possess enough armor penetration to pierce any known enemy armored vehicle at ranges of up to 500 m.

Surprisingly, initially, it was requested that this vehicle be open-topped. As this was a vehicle that was to provide close fire support, having an open-top would be too dangerous for the crew and this requirement was changed to include a fully enclosed crew compartment. The armor had to be enough to stop 20 mm rounds. Thanks to the weight-saving due to not having a turret, stronger armor plates could be used.

These were all early requirements and some changes would be introduced during initial development. Probably most noticeable were the characteristics of the gun (firing range and traverse), which had to be changed from the initial requirements.

To speed up the development time, a Panzer III chassis was to be used. The Panzer I and II chassis were too small. Why the Panzer IV chassis was not used is not specified in the sources, but there may be a few reasons for this. Roughly at the same time, the Germans had initiated the standardization of tank development. According to plans drawn up by Wa Pruef 6 (the German Army’s design office for armored vehicles and motorized equipment), the Panzer IV, starting from the Ausf. C version was to be built using the new Panzer III Ausf. E chassis, which used torsion bar suspension. Due to problems with the Panzer III development, nothing came from this.

Due to Germany’s general lack of industrial capacity during the 1930s, it would take some time before the first prototypes could be delivered. Daimler-Benz from Berlin-Marienfelde was chosen for designing and building the first prototypes. In 1937, the assembly of a small 0-series based on the Panzer III Ausf. B chassis began. These received a soft-steel superstructure and thus could not be used in combat. Their main purpose was to serve as evaluation, testbed, and training vehicles.


Initially, this vehicle was designated as schwere Panzerabwehrkanone sPaK. The usage of the prefix Selbstfahrlafette or short Sfl. (Eng. self-propelled chassis) was also common. It was also common to see the use of the Sturmgeschütz designation in German documents. As it was based on the Panzer III chassis, sometimes it would also be referred as Panzer-Selbstfahrlafette III (Eng. tank self-propelled chassis III).

At the end of March 1940, the name was officially changed to Gepanzerten Selbstfahrlafette fur Sturmgeschütz 75 mm Kanone, which could be translated as armored self-propelled chassis for 75 mm armed assault gun. The first series of this vehicle received the Ausfuhrung (Eng. version or series) A designation. In addition, the Sd.Kfz. 142 number was added to the name. It is generally best known under the much shorter StuG III Ausf. A name. This article will use this shorter designation for the sake of simplicity.

Production of the StuG III Ausf. A

While no StuG III was used during the fighting in Poland in September 1939, experience gained there showed that such a vehicle was desirable. One month after this campaign, the Waffenamt (ordnance bureau) issued a production order for 280 vehicles. This included 30 vehicles of the initially marked 0-series (actually the Ausf. A version) and 250 of the second series.

The five vehicles of the actual 0-series were built using a chassis of a Panzer III Ausf. B. Source:

For the production of the StuG III Ausf. A, several companies were included. The production of the guns and its mounting was carried out by Krupp from Essen. Brandenburger Eisenwerke, together with a couple of smaller firms, was responsible for providing the necessary armored parts and components. The guns and armored components, once available, were transported to Daimler-Benz for final assembly. The chassis, taken from the Panzer III Ausf. F series (starting from serial number 90.001), were also to be produced by Daimler-Benz. Interestingly, according to W. J. Spielberger (Panzer III and its Variants), these were actually completed by Alkett in Berlin.

A slightly modified Panzer III Ausf. F chassis was used for the StuG III Ausf. A. Source:

Official orders for 30 StuG IIIs were issued on the 13th of October 1939. These 30 vehicles had to be completed no later than the beginning of April 1940. The first fully completed chassis was delivered during December 1939. During the installation of the gun mounts, it was noted that, due to a miscalculation, these could not be fitted. This miscalculation led to a one-month-long pause in production until this issue was resolved. The whole order for 30 vehicles was completed by April 1940.


While visually quite similar to the early prototypes, the StuG Ausf. A features a number of improvements to the overall design. In addition, the Panzer III Ausf. F-based chassis was not completely identical to the tank version, as there were some minor differences made to its design.

The Hull

The StuG III Ausf. A hull can be divided into three major sections. These were the forward-mounted transmission, central crew compartment, and rear engine compartment. The front hull was where the transmission and steering systems were placed and it was protected with an angled armor plate. The two square-shaped, two-part hatch brake inspection doors were located on the front hull. In contrast to the tank chassis it was based on, these opened vertically and not horizontally. While the StuG III 0-series had two bolted round-shaped plates added on the front transmission, these were removed on the Ausf. A. There were four towing couplings, with two at the front and two at the rear of the hull.

The 0-series had two round two-part brake inspection hatches located on the front hull. These were removed on the first production StuGs. Source: T.L. Jentz and H.L. Doyle Panzer Tracts No.8 Sturmgeschütz

Suspension and Running Gear

The Panzer III Ausf. F suspension consisted of six pairs of road wheels on each side. These were suspended using a combination of individual swing axles together with torsion bars which were placed in the bottom of the hull. The upper movement of each wheel’s swingarm was limited by contact blocks covered in rubber. Additionally, the first and the last wheels were equipped with a hydraulic shock absorber. At the front, there was a 360 mm wide 21 tooth drive sprocket. On the back of the hull was the idler with an adjustable crank arm. The number of return rollers was three per side. The cast tracks were 380 mm wide.

The Panzer III Ausf. B suspension, which consisted of 8 small road wheels. This suspension was deemed ineffective and too complicated. Source:
The Stug III used a simpler torsion bar suspension. Source:
Illustration of the Panzer III’s suspension arrangement. Source:

The Engine 

The early prototype version was built on the Panzer III Ausf. B chassis. The production version was actually built using the much improved Panzer III Ausf. F chassis. This included the usage of a stronger twelve-cylinder, water-cooled Maybach HL 120 TRM engine giving 265 hp (in some sources listed to be 280 or even 300 hp strong) @ 2,600 rpm. The StuG III Ausf. A’s engine was placed at the rear of the hull and was separated from the central crew compartment by a firewall. The firewall had a small door. Its purpose was to provide the crew members with access to the engine if needed.

The engine was held in place by three rubber bushings. With this power unit, the StuG III Ausf. A’s maximum speed was increased to 40 km/h, while the cross-country speed was 20 km/h. The fuel load of 310 liters was stored in two fuel tanks placed below the radiators in the engine compartment. With this fuel load, the  StuG III Ausf. A’s operational range was 160 km on roads and 100 km cross-country. To avoid any accidental fires, these fuel tanks were protected by firewalls.

The engine compartment was protected by an enclosed superstructure. On top of this compartment, two two-part hatches were added for access to the engine. Further back, two smaller doors were added to provide the crew access to the fan drives. The air intakes were repositioned to the engine compartment sides and were protected with armor plates.


The StuG III Ausf. A was equipped with a somewhat overly complicated ten-speed and one reverse Maybach Variorex SRG 32 8 145 semi-automatic transmission. The transmission was connected to the engine by a drive shaft that ran through the bottom of the fighting compartment. The steering mechanism used on the Panzer III was bolted to the hull. It was connected to the two final drives, which were themselves bolted to the outside of the hull. In theory, with this transmission, the StuG III Ausf. A could reach speeds of up to 70 km/h. In reality, this caused huge problems and the rubber-rimmed road wheels had to be changed frequently due to being worn out. The transmission itself was overly complicated, difficult to produce, and prone to frequent breakdowns. It would be replaced with a much simpler and more reliable SSG 76 transmission on a later version of the StuG III.

The Superstructure 

The box-shaped upper superstructure was taken almost directly from the initial StuG 0-series, with some small differences. The front and side armor plates were flat. On the left front, the plate was a driver vision port. The StuG Ausf. A introduced a new improved driver protective visor, the Fahrersehklappe 50, which was 50 mm thick. When the visor was closed, the driver would use a K.F.F.1 binocular periscope to see through two small round ports located just above the visor. In front of it was a bullet splash protector. Left of the driver’s position, there was another vision port. Both of these were further protected with armored glass. What appears to be doors on the StuG III Ausf. A’s sides were actually angled plates that served as spaced armor. On the left superstructure side, a box-shaped armored extension was used to store the radio receiver (Empfanger h). Just behind it was a folded antenna. The rear armor plate was unusually angled, somewhat complicating the overall design.

The box-shaped upper superstructure was, with some differences, taken directly from the initial StuG 0-series. On the left front plate was a driver vision port, with another vision port placed to the left of him. Source: Anderson Sturmartillerie, Osprey Publishing
The StuG Ausf. A introduced a new improved driver protective visor, the Fahrersehklappe 50, which was protected by an armored glass block on the inside. Source: Anderson Sturmartillerie, Osprey Publishing
When the visor was closed, the driver would use a K.F.F.1 binocular periscope to see through two small round ports located just above the visor. Source: Anderson Sturmartillerie, Osprey Publishing

Probably the most noticeable feature of the StuG III Ausf. A was the large sight tunnel placed above the driver’s position. It led to the gunner’s optics used to aim the gun. In the hope of protecting the optics, zig-zag type deflectors were added. This was slightly redesigned compared to the 0-series. This installation proved to be flawed in design and would later be abandoned. The top of this superstructure was bolted down and could be easily removed to facilitate repair or removal of the gun if needed. There were a few hatches added on the top. Two small hatches were placed above the gunner’s position. One served as an opening for the indirect fire sight. To the rear, there were two larger two-piece hatches used by the crew to enter their positions.

The gun itself was protected by a mantlet. Behind this, a canvas was used to protect the interior of the vehicle from the weather. This was connected to the hull using simple bolts.

The StuG III Ausf. A had a large sight tunnel placed above the driver. It was to be used by the gunner’s optics to aim the gun. Source:

Armor Protection

The StuG III Ausf. A was well protected for its time. The front and upper hull armor were 50 mm thick and placed at 21° and 52° angles, respectively. The smaller lower hull plate, which was placed at 75°, was 30 mm thick, while the sides and rear were 30 mm thick.

The front superstructure armor plates were 50 mm thick. Like the hull armor, the superstructure side and rear were also 30 mm thick. The angled space armor was 9 mm thick and placed at a 30° angle. The top armor was 10 mm, while the top of the engine compartment was slightly thicker, at 16 mm. The gun mantlet was 50 mm thick. The StuG Ausf. A III was one of the most well-armored vehicles in the German arsenal at that time.

The superstructure’s angled side plates were not doors, despite appearing so. These were, in fact, spaced armor meant to provide additional protection. Source:

From August 1938 on, nearly all German Panzers were equipped with a Nebelkerzenabwurfvorrichtung (smoke grenade rack system). This device was placed on the rear of the hull. It contained five grenades which were fired through a wired system by the commander. When activated, the StuG would then drive back under the safety of the smokescreen.

The rear hull-mounted Nebelkerzenabwurfvorrichtung smoke grenade rack, seen here mounted on a StuG III. Source:


The main armament remained the same as used on the 0-series. It consisted of a 7.5 cm StuK 37 (Sturmkanone – assault cannon) L/24. It was more or less the same gun used on the Panzer IV tanks. The 7.5 cm StuK 37 was a semi-automatic gun, which meant that, after a round was fired, it was automatically ejected, enabling the loader to insert a new round. As it was intended as a close support weapon, it had a rather low muzzle velocity. Despite this, it was a fairly accurate gun, with a 100% hit probability in action at ranges up to 500 m. The accuracy dropped to 73% at 1 km and to 38% at distances of over 1.5 km. While, initially, it was requested that its maximum firing range be 7 km, it could only reach targets at 6 km.

While it was primarily designed to engage fortified positions using a 7.5 cm Gr Patr high-explosive round weighing 5.7 kg (at a 420 m/s velocity), it was also fairly good for engaging enemy armor. This fact is often overshadowed by its close support role (similar to the Panzer IV). Prior to the war, the Germans were clearly aware of the new French tank designs. When developing the 7.5 cm gun, they also introduced armor-piercing ammunition capable of piercing at least 40 mm of armor. The 7.5 cm PzGr patr was a 6.8 kg armor-piercing round with a muzzle velocity of 385 mps, and could pierce around 39 mm of 30° angled armor at distances of 500 m. The ammunition load consisted of 44 rounds stored in front of the loader. The 7.5 NbGr Patr was a smoke-screen round. When fired, it would create a smoke cloud that could cover an area of 15 to 20 m for a period of some 30 seconds. It is important to note that its effectiveness greatly depended on the weather. The secondary armament of the StuG III was unchanged and consisted of two 9 mm MP 38/40 submachine guns.

The 7.5 cm StuK 37 was equipped with a Rundblickfernrohr RblF 32 type panoramic gun sight.  The elevation of the gun -10° to +20°, while the traverse was limited to 12° per side. Given the nature and role, it was to fulfill, the limited traverse and lack of turret were not major issues for the StuG III.


The crew of this vehicle consisted of four men, the commander, driver, loader, and gunner.  While the loader was positioned to the right of the gun, the remaining crew were placed opposite of him.  The driver was positioned in the left front side of the hull. Just behind him was the gunner, and right behind him was the commander.

The commander was not provided with a command cupola. In order to look for possible targets, the commander would use a scissors periscope. It was usually placed in a tube-shaped sunshade cover. With this, he could spot potential targets from inside the vehicle. However, he would often have to partly get out of his position to acquire targets, potentially exposing himself to enemy fire.

The crew of this vehicle consisted of four men, the commander, driver, loader, and gunner. In case of emergency, the driver could use the front transmission hatch to escape from the vehicle. Source: Anderson Sturmartillerie, Osprey Publishing

StuG III Ausf. A/B hybrids

The production of further StuG III versions was moved to Alkett. Almost from the start, there were delays in production, largely due to the introduction of the new transmission on the Panzer III. As there were no new available chassis, in order to avoid any major delays, some 20 additional StuG III Ausf. A was ordered to be built. Author T. Anderson (Sturmartillerie: Spearhead Of the Infantry) mentioned that there are two production numbers for this hybrid vehicle. While older sources mention a number of 6, a number of 20 seems more likely to be true. This number is supported by German production statistics published in the works of T.L. Jentz and H.L. Doyle (Panzer Tracts No.8 Sturmgeschütz).  The difference was that these were in essence hybrid vehicles, incorporating a chassis from the Panzer III Ausf. G merged with a superstructure intended for the StuG III Ausf. B version.

The hull front armor plate, which was 30 mm thick, was reinforced with an additional 20 mm of bolted armor plates. On the hull sides, between the front road wheels and return rollers, there were two small escape hatches. In addition, on the front hull armor plate, two enclosed air intake ports were installed.

The unusual StuG III Ausf. A/B hybrid, used as a replacement for the delayed production of the later Ausf. B series. Source: T.L. Jentz and H.L. Doyle (199) Panzer Tracts No.8 Sturmgeschütz


The initial unit organization for these vehicles was quite simple, as it was limited by the available numbers. Six vehicles were used to form a Sturmartillerie Batterie (Eng. assault gun battery). These were divided into three zuge (Eng. platoons), each equipped with only two vehicles. As more StuG IIIs became available, their unit strength was increased to abteilungen (Eng. battalion) strength of 18 vehicles. These battalions were divided into three batteries, each 6 vehicles strong.

The StuG-equipped units were to be reinforced with armored half-tracks. As the StuG III had a relatively small ammunition load and was on the move constantly, ordinary trucks could not be used as ammunition carriers. Instead, the Sd.Kfz. 252 half-track was to be used. It had an interior storage capacity of 64 rounds. An additional 64 rounds could be carried in an ammunition trailer (Sd.Ah. 32/1). The Sd.Kfz. 253 vehicle was designed to act as a command vehicle and was thus equipped with radio equipment. The larger Sd.Kfz. 251/12 were to be used to transport replacement crews. In total, each StuG battery was supposed to have had 6 Sd.Kfz. 252, 5 Sd.Kfz. 253, and 3 Sd.Kfz 251s. In addition, an Sd.Kfz. 9 was allocated for the recovery of damaged vehicles.

Due to the slow production of this vehicle, not all of these support vehicles were available. The StuG units had to use what was at hand, including Sd.Kfz. 10s or modified Sd.Kfz. 251s (with a closed top) half-tracks and turretless Panzer Is.

The Sd.Kfz. 253 was used as a command vehicle for the StuG batteries. Source: Wiki
The Sd.Kfz. 252 had an interior storage capacity of 64 rounds. An additional 64 rounds could be carried in a Sd.Ah. 32/1 ammunition trailer. Source:


The Artillery-Lehr-Regiment (ALR) stationed at Jüterbog was chosen to train the StuG crews. The first five vehicles of the 0-series were used extensively in this role. The whole training process was carried out in secrecy. The StuG crews were all volunteers from artillery regiments. The initial personnel consisted of 90 non-commissioned officers and 250 men.

At the start of 1939, as a Soviet Army Delegation was visiting the Jüterbog artillery center, they noticed the new vehicles and immediately took pictures of them. The German Army officials present felt they had to do something to prevent the pictures from reaching the USSR. They invited the delegation to visit Berlin, where a new (not specified in the source) aircraft type was to be presented. As the Soviet delegation was on their way to see the new aircraft at the Berlin Tempelhof airport, they walked through the corridor where a powerful X-ray gun was secretly placed. The Soviet delegation would be quite surprised when they later opened the films and saw that they were completely destroyed by the X-rays.

In Combat

Prior to the Western campaign of 1940, the 24 available StuGs were distributed to four batteries: the 640th, 659th, 660th, and 665th. The 640th was combat-ready on the 4th of April, followed by the 659th on 20th April, 660th on 8th May, and the 665th on the 9th of May 1940. These were to be attached to various infantry divisions, depending on the combat needs. Two additional units were formed using the StuG III Ausf.A/B hybrids. These included the 666th and 667th batteries. The remaining StuG III Ausf. As we’re used to creating an SS assault battery for the LSSAH (Leibstandarte SS Adolf Hitler) division.

The StuG III Ausf. A from the 665th Batterie. Source: Anderson Sturmartillerie, Osprey Publishing

When the German attack came on the 10th of May 1940, the 640th Battery was the first to see action. It was attached to the Grossdeutschland Regiment. The 640th would be one of the first StuG batteries to be permanently attached to an infantry unit. After the western campaign, it would become part of the Grossdeutschland Regiment under the new 16th Assault Gun Battery name.

Unfortunately, due to the limited numbers of StuG III Ausf. As used during the Western campaign, not much is documented of their combat use by the Germans. The StuG IIIs from the 640th participated in the defense of German-held positions at Bulson Ridge. On the 14th of May, the French were trying to dislodge elements of the XIX Panzerkorps. The French attacked with FCM 36 tanks, which proved difficult to destroy using 3.7 cm anti-tank guns. The StuG III Ausf. A, together with 88 mm armed 12-tonne half-tracks, helped to turn the tide.

In a report made by private H. Engle from the 660th Battery after this campaign, he noted that:

“.. The French light tanks (R 35) were invulnerable to the 2 cm guns … but lost their turrets after being hit from our ‘Stummel’… We felt safe in our Sturmgeschütz and an after-action check at Givry-en-Argonne showed that our front plate had received 13 hits, but not one penetrated our armor.”

Only one StuG III Ausf. A was reported to be lost, but it was recovered and repaired. The performance of the StuG III in France was a huge success, and the Army officials demanded the production of the newer version be increased.

Following the completion of the Western campaign, the 660th, 666th, and 667th Batteries were used extensively in the preparation for Operation Sealion, which never came. After this, some of the first StuG batteries were transported to Northern Germany, where they were positioned up to early 1942.

After the German victory against the French in 1940, 660th, 666th, and 667th Batteries were used for extensive amphibious exercises for the planned invasion of the United Kingdom. Source: Anderson Sturmartillerie

The 659th, 660th, 665th,  666th, and 667th  Batteries were attached to Army Group North during the early phases of the Barbarosa campaign. Some of them received an improved suspension and wider tracks.

StuG III Ausf. A of the 667th Batterie on the Eastern Front. Note this vehicle had an improved suspension. Source: T. Anderson  Sturmartillerie Spierhead Of the Infantry

Surviving vehicle

Despite the small production numbers one of the Ausf. A survived to this day. It could be seen at the Australian Armour and Artillery Museum in Cairns.

The only surviving StuG III Ausf. A. Source:



The StuG III Ausf. A, while only being built in small numbers, proved that such a vehicle was quite desirable. It had a rather simple design, a low silhouette, and a powerful gun. What was most important was that it possessed good mobility, being able to quickly reposition to engage new targets. Nevertheless, the Ausf. A was only the first stepping stone. It would be supplemented by the new Ausf. B version, which was basically the same vehicle with some improvements.

StuG III Ausf. A Ilustration made by David Bocquelet


Weight 20.7 tonnes
Dimensions Length 5.38 m, Width 2.92 m, Height 1.95 m
Crew 4 (Commander, Gunner, Loader, and Driver)
Propulsion Maybach HL 120 TRM 265 hp giving 265 hp @ 2600 rpm
Speed (road/off-road) 40 km/h, 20 km/h
Range (road/off-road) 160 km, 100 km/h
Primary Armament 7.5 cm L/24
Elevation -10° to +20°
Superstructure armor: 10 to 50
Hull armor: 15 to 50 mm
Total Built 30 + 6 to 20




WW2 German Assault Guns

Sturmgeschutz L6 mit 47/32 770(i)

Germany (1943-1945)
Light Self-Propelled Gun – 194 Captured and Produced

The Semovente L40 da 47/32 was an Italian light Self-Propelled Gun (SPG) developed as an infantry support vehicle. It entered service in 1942, immediately proving to be obsolete. The Regio Esercito (Eng: Italian Royal Army) used it until September 1943, when the Cassibile Armistice was signed, the Italian Royal Army was disbanded and the Italian peninsula not yet under Allied hands was occupied by the German troops.

After the armistice, from 1943 to 1945, all the surviving Semoventi (Italian world for self-propelled guns, Semovente singular) that were deployed, not only in Italy, but also in the Balkans, were captured by the armies or militias in the area.

The Semovente L40 da 47/32

The development of a new light infantry support gun that could support the assault of the Bersaglieri units (Eng: Italian Light Assault Troops) started in the late 1930s, but the first two prototypes were not accepted into service.

Another prototype development started in January 1941. On May 10th, it was presented to the Royal Army. After the tests, the Italian Royal Army High Command requested some changes to the prototype. It was renamed Semovente Leggero Modello 1940 da 47/32 or Semovente L40 da 47/32 (Eng: Lightweight Self-Propelled Gun Model 1942 armed with 47/32).

A total of 402 vehicles were produced under Italian and German control based on the hull of the L6/40 light reconnaissance tank.

German Operation Achse

After the arrest of Benito Mussolini, the leader of the Partito Nazionale Fascista Italiano (Eng. Italian National Fascist Party), on July 25th 1943, the Germans had foreseen the Italian surrender. They planned Fall Achse (Eng: Operation Axis), which they launched on September 8th when the signing of the Armistice of Cassibile (which had been secretly signed on September 5th by the Italian Royal Army and Allied Forces) was made public. In 12 days, the German troops managed to occupy all the Italian command centers and divisions in Italy and in the other occupied territories.

The Germans captured all the Italian factories that produced armaments or military equipment. They also captured 977 Italian armored fighting vehicles, of which about 400 were tanks and self-propelled guns, 16,631 trucks, over 5,500 artillery pieces, 2,754 anti-tank or anti-aircraft guns, over 8,000 mortars, 1,285,000 rifles, 39,000 machine guns, and 13,000 submachine guns. They imprisoned 1,006,730 Italian soldiers stationed in Italy, the Balkans, Greece, and France.

By October 1st, 1943, Wehrmacht documentation stated that German units had captured 78 L40 da 47/32s in all occupied territories (including the 20 L40s produced before the Armistice and not delivered). In German service, this vehicle was known as the Sturmgeschütz L6 mit 47/32 770(i). For this reason, some sources wrongly call it Semovente L6 or StuG L6.

In addition, many former Italian factories, such as FIAT, Lancia, Breda, and Ansaldo-Fossati, were also under German control. With this and with the acquisition of many spare parts and materials, it was possible to restart the production of nearly all Italian vehicles. This was the case with the Semovente L40 da 47/32, with the Germans producing 74 new Sturmgeschütz L6 mit 47/32 770(i).

Under German control, another 46 Command and Radio Center vehicles on the L40 hull were produced, which brings the total number of L40 produced by the Germans to 120 units.

Operational service in Italy

While the Semovente L40 da 47/32s were available in some numbers, their use in Italy by the Germans was limited. The units that had this vehicle in Italy were the 305. and 356. Infanterie Divisionen, Schwere Panzerjäger Abteilung 590, 114. Jäger Division and the 20. Luftwaffe-Field-Division.

The 305. Infanterie Division fought between September 8th and 10th to occupy the port of La Spezia. It was transferred in the following weeks to near Rome, where it was supplied with some Italian vehicles, among which were some L40 from 47/32s.

The 305. Division then defended the Gothic Line and the Gustav Line before surrendering, together with most of the German divisions that remained after the Battle of Bologna, on the Po River.

The 356. Infanterie Division fought in anti-partisan actions between November 1943 and January 1944. It was transferred to Anzio and was provided with the self-propelled L40 vehicles along the way.

The unit fought fiercely for the defense of the region together with the Italian Republican National Army units until they were forced to retreat along the Gustav Line in March 1944. After the Gustav Line was broken through, the unit fought in Tuscany. retreating to the south of Florence in July 1944. In January 1945, it was transferred to Hungary but, according to the surviving documents, it was no longer equipped with Italian self-propelled vehicles.

The Schwere Panzerjäger Abteilung 590 was used from June 13th to September 14th, 1944 to secure central Italy. In order to perform this task, the unit was provided with some L40 self-propelled vehicles. From September 15th, 1944 to January 15th, 1945, the unit was involved in defensive combat in the Emilia-Romagna region.

Due to the scarcity of artillery towing vehicles and the obsolescence of the self-propelled L40 variants, many self-propelled vehicles were modified by removing the cannon to be used as artillery tractors.

From April 22nd to May 2nd, 1945, the unit was involved in the fighting retreat, desperately battling against the Allied forces.

The 114. Jäger Division was transferred to Italy from Yugoslavia in January 1944. It was supplied with material captured from the Italian Army, including some L40 self-propelled vehicles. After the Battle of Anzio, the unit was employed only in anti-partisan roles. It was responsible or co-responsible for three different massacres in the region of central Italy against innocent civilian victims. The unit was completely annihilated in April 1945 during fighting with Allied forces.

This Semovente L40 da 47/32 was used to tow a German 7.5 cm PaK 40 anti-tank gun. Source:

Panzer Ausbildung Abteilung Süd (a training tank battalion) was equipped with the Semoventi L40s, but these were used mainly for crew training. Organization Todt, which was present in Italy, operated an unknown number of L40 da 47/32s, but mostly as tractor vehicles without their guns.

In May 1944, the 20. Luftwaffe Field Division (20. LwFD), previously employed in Denmark, was sent to Italy, more precisely to Lazio. There, it was re-equipped with a number of Semoventi L40 da 47/32s and immediately participated in hard clashes with the U.S. Army units in the Terracina area. On June 1st, the unit assumed the designation of 20. Luftwaffen-Sturm-Division.

The division retreated to Tuscany and established defensive positions near Roccastrada. From there, at the end of June, it was again engaged in heavy clashes against U.S. forces.

After fighting house by house for the control of Siena against the units of the Corps Expéditionnaire Français en Italie (Eng: French Expeditionary Force in Italy), in July 1944, the division withdrew to the area of Volterra. It was then withdrawn from the front to be sent to the rear to guard the coast between Viareggio and La Spezia, where it absorbed the remains of the 19. LwFD. In mid-September, the division received orders to move to the coast of the Adriatic Sea, facing the Commonwealth forces between Rimini and Santarcangelo di Romagna and then south of Cesena.

After the killing of their commander in Bologna by the partisans and further heavy losses in the fighting between Cesena and Forlì, the division was disbanded on November 28th, 1944 and its survivors were reassigned to other German units.

Some Semoventi L40 da 47/32s were used as training vehicles. These had their guns removed and a wooden shield added instead. This vehicle possibly belonged to the Panzer Ausbildung Abteilung Süd. Source:

Operational service in Balkans

In the Balkans, the L40 da 47/32s saw extensive use against Yugoslav resistance movements. Several German units were equipped with them. Some of these were the 117. and 118. Jäger Divisionen, 11. Luftwaffe-Field-Division, and the 181., 264. and 297. Infanterie Divisionen. Many police units of different sizes (such as the 13. Verstärkt Polizei Panzer Kompanie, 14. Panzer Kompanie, 4. SS Polizei Division) were also equipped with this vehicle. Some smaller units were also supplied, such as SS Panzer Abteilung 105. and Panzer Kompanie z.b.V 12.

In 1944, due to the availability of Italian armored vehicles, it was possible to resupply many German units which fought in Yugoslavia with them. The Germans did not form dedicated Panzer units with these vehicles. Instead, these vehicles were usually used to equip reconnaissance or anti-tank units (Aufkl. Abt and Pz.Jag. Abt.). By May 1944, German forces operating in Yugoslavia had at least 165 Semovente 47/32 vehicles.

By the end of 1943, Panzer Kompanie z.b.V 12 had in its inventory 12 operational Semoventi L40 da 47/32s and 4 in repair. In early 1944, it received an additional 14 Semoventi da 47/32, one L6 light tank, and 4 M13/40s. By February 1944, there were only 2 operational Semoventi da 47/32 and 2 in repair. On March 1st, 1944, some 10 were operational and 3 in repairs. These were allocated to the 2nd Company, which took action against partisan units around the city of Kraljevo. In July, the number of Semoventi da 47/32 was increased to 15 vehicles. The reason for the large monthly oscillations in available numbers is not clear. It could be either a mistake in sources or, because of the poor mechanical reliability, some vehicles were simply not listed. By September and October 1944, while this unit still had 16 such vehicles, they were replaced in order to increase the number of M15 tanks.

The 14th Panzer Kompanie was another example of a German unit using the Semovente L40 da 47/32. This unit, which was active in Slovenia in September 1944, was reinforced with two 8 vehicle strong platoons equipped with the Semovente L40 da 47/32. One smaller unit with four such vehicles was kept in reserve.

While fighting the Partisans in the Balkans, the L40 da 47/32s were usually dispersed and used in smaller groups. The usual tactical employment was that one vehicle would advance while the remaining vehicles provided cover.

By the end of 1944, on the Yugoslavian Front, the Germans and their allies had less than 80 Semoventi L40 da 47/32. Near the end of the war, in March 1945, the numbers were reduced to less than 40.

A column of armored vehicles belonging to the German 13th Verstärkt Polizei Panzer Kompanie. In the foreground is a Panzer IV Ausf.F followed by three Italian tank destroyers. Source: Bojan B. Dumitrijević and Dragan Savić Oklopne jedinice na Jugoslovenskom ratištu
A pair of Semovente L40 da 47/32s of the third series in German hands. Notice the addition of a machine gun and a gun shield on the roof of the vehicle. Source:

In German hands, the Semovente L40 da 47/32 was modified in order to improve its performance. As the L40 da 47/32 was initially only armed with the main gun, it was less effective against infantry attacks. For this reason, the Germans added machine gun mounts that were protected with an armored shield at the front. The machine gun models used included the Breda Mod. 37 and Breda Mod. 38, both 8 mm caliber, and, in some cases, MG34s or Fiat-Revelli Mod. 14/35. Additional armor plates were added to the side of the superstructure, and in some cases, even on the top. Additional spare part boxes were also sometimes added.

Also, as previously noted, a significant number of these vehicles were modified to be used as towing tractors or as training vehicles. For these modifications, the main gun was removed. In the case of the training vehicles, a wooden shield was simply added where the gun was.

A Semovente L40 da 47/32 of the second series in Baranja (Serbia) at the start of 1945. Interestingly, this vehicle appears to be armed with a German MG 34 machine gun. Source: Bojan B. Dumitrijević and Dragan Savić Oklopne jedinice na Jugoslovenskom ratištu

The SS Polizei-Regiment 18 Gebirgsjäger was equipped with two Italian armored cars and at least five Semoventi 47/32s when it was relocated from Greece to the northern regions of Serbia in October 1944. It was engaged in a failed German attempt to stop the advancing Soviet Forces in Vojvodina and suffered heavy losses, probably losing all its vehicles.

In general, the German view of the L40 was very negative. It was small and narrow and the cannon was not able to face the most modern opponent vehicles. In anti-partisan actions in Italy and in the Balkans, it proved relatively effective, as its small shape and weight allowed it to climb very steep mountain roads, where only mules could pass. The cannon, even if almost useless against the armor of Soviet or American tanks, had a good High Explosive round that was effective against infantry.

The Germans, as well as the Italians, realized that the vehicle was very vulnerable to ambushes. Consequently, German tankers learned to wear the Stahlhelm helmet and carry MP40s and hand grenades inside the vehicle for close defense.


The Germans repainted the L40s that they captured from the Italians or that they received after November 9th with a three-tone camouflage, depending on the unit that used them.

For example, Schwere Panzerjäger Abteilung 590 repainted its L40 da 47/32s with dark green and dark brown stripes on a standard khaki base. SS Polizei-Regiment 18, stationed in Greece, repainted its vehicles in three-tone camouflage, dark green, and brown spots on standard khaki. The 20. Luftwaffen-Feld-Division, which used some L40s in anti-partisan duties in central-northern Italy, camouflaged its self-propelled guns vehicles with patches of green and dark brown.

Semovente L40 da 47/32 of the SS Polizei-Regiment 18 in Athens during a parade May 23rd, 1944. Note the three-tone camouflage pattern. Source:
A Semovente L40 da 47/32 Platoon Command vehicle used by the 20. Luftwaffen-Feld-Division near Lucca, Italy Summer 1944. The original Regio Esercito plate (R.E. 5282) is clearly visible near the big Balkenkreuz, drawn to avoid friendly fire. Source:


The Semovente L40 da 47/32, while cheap and small in size, was by 1943 standards generally an obsolete vehicle. For the Germans who were at this stage of war becoming ever more desperate to find any additional armored vehicle, it was a welcome addition. The use of the Semovente L40 da 47/32 by the Germans in its original role against the Allied forces in Italy was limited. They did see service in other secondary roles for example crew training or as armored tractors. They were more deployed in combat against the Partisans especially in the Balkans where the enemy had limited anti-tank capabilities.

German StuG L6 mit 47/32 630(i), summer 1944. Illustration by David Bocquelet.

Semovente da 75/18 specifications

Dimensions (L-W-H) 3.82 x 1.92 x 1.63 m
Total Weight, Battle Ready 6.5 tons
Crew 3 (commander/gunner, driver, loader)
Propulsion Fiat SPA, 6 cyl. gasoline, 68 hp
Speed (road) 42 km/h (off-road) 20/25 km/h
Range 200 km on-road
Armament Cannone da 47/32 Mod. 1935, 70 rounds
Armor 30 mm front, 15 mm sides and rear, and 10 mm floor
Total Production 74 Semoventi L40 da 47/32 captured and 120 produced under German control in all variants


Bojan B. Dumitrijević and Dragan Savić (2011) Oklopne jedinice na Jugoslovenskom ratištu,, Institut za savremenu istoriju, Beograd
T. L. Jentz (2008) Panzer Tracts No.19-2 Beute-Panzerkampfwagen
F. Cappellano and P. P. Battistelli (2012) Italian Light tanks 1919-45, New Vanguard
Nicola Pignato e Filippo Cappellano – Gli autoveicoli da combattimento dell’Esercito Italiano, Volume secondo (1940-1945).
Filippo Cappellano – Le artiglierie del Regio Esercito nella Seconda Guerra Mondiale
Nicola Pignato – Armi della fanteria Italiana Nella Seconda Guerra Mondiale
Olivio Gondim de Uzêda – Crônicas de Guerra

WW2 German Assault Guns

Sturmgeschütz IV für 7.5 cm Sturmkanone 40 (Sd.Kfz.167)

Germany (1943)
Assault Gun – 1,141-1,500 Built

When the Alkett factory was heavily bombed by the Allied Air Force in November 1943, the production of the StuG III was almost put to a halt. In an attempt to find a relatively easy solution, the Germans simply merged the Panzer IV chassis with a StuG III upper superstructure, creating a new vehicle, the StuG IV. Production was conducted relatively quickly, with 30 vehicles completed by December 1943 and, by April 1945, over 1,000 would be built. Like its StuG III cousin, the StuG IV was also an effective assault gun which would see service on all major fronts up to the end of the war.

The StuG IV. Source:

Sturmgeschütz concept

During the Great War, German (and many other nations) infantry formations were supported by towed artillery. For German Sturmtruppen (Eng. Stormtroopers) that depended on mobility. The necessary towed artillery proved to be slow and inadequate for the supporting task in taking more fortified enemy positions. Based on this experience, after the war, the great German Army tactician, General Erich von Manstein, proposed using highly mobile, well protected and armed self-propelled artillery. They were to provide infantry with mobile close fire support during combat operations. These were to be organic part of standard Infantry Divisions at a battalion strength of around 18 vehicles.

Due to Germany’s general lack of production industrial capacity during the 30’s, it would take years before the first prototypes were completed. The Germans were also forbidden by the Versailles Treaty to develop and produce tanks, which Hitler, when he came to power, publicly denounced. The development of these vehicles was also hindered by conflict in different branches of the Germany Armed Forces. Eventually, it was decided that these vehicles would be put under direct supervision of the Artillery. These vehicles would be known as Sturmgeschütz III (assault gun vehicles) but were generally known simply as StuG III.

To speed up the development, it was decided to reuse many elements of Panzer III vehicles. The design was very simple and consisted of a new superstructure armed with a short barrel 75 mm gun placed on the Panzer III chassis.While the first prototypes were completed in 1937, it was not until 1940 when the initially limited production actually started. Once pressed into service, the StuG III proved to be an excellent infantry support vehicle. When the Germans invaded Soviet Union in 1941, the Germans noticed that their available anti-tank weapons were almost useless against the Soviet modern tank designs (T-34 and KV’s). To address this problem, in 1942 the Germans introduced a new StuG III armed with the longer 75 mm gun that was more effective as a tank destroyer. As production of the StuG III shifted more towards the anti-tank role, the Infantry was left without a proper support vehicle. To address this, a new version of the StuG III armed with a 10.5 cm howitzer was introduced in 1943. Both versions would remain in production until the war ended with over 10,000 being produced, making them the most numerous German armored vehicle of the war.

The 75 mm L/24 short-barreled StuG III served as an excellent infantry support weapon during the war. Source:
To address the ever increased threat of more advanced enemy armor the Germans upgraded the StuG III with the longer L/43 and later L48 75 mm anti-tank guns. Source:

The first StuG IV

In early 1943, Albert Speer approached Krupp officials with a suggestion for producing a new Sturmgeschütz. Soon after, Krupp began working on the first basic drawing of this vehicle, which was to incorporate a number of already produced components. These include a StuG III Ausf.F superstructure, Panzer IV Ausf.H chassis and a 7.5 cm StuK 40 L/48 gun. The superstructure of the StuG III Ausf.F was chosen as, at that time, Krupp did not possess the design plans for the newer Ausf.G version. Unlike the later produced Sturmgeschütz based on the Panzer IV that used the unchanged StuG III superstructure, the initial Krupp design was different. The front part of the superstructure incorporated a highly angled (50 mm thick) armor plate which would have provided excellent protection. Other changes included increasing the armor protection on the sides to 45 mm, compared to the original 30 mm, and the increase of the track’s width.

Drawing of Krupp’s initial project for the new StuG vehicle based on the Panzer IV chassis. Source: T.L. Jentz and H.L. Doyle Panzer Tracts No.20-1 Paper Panzers

After the first drawing and calculation were completed, Krupp informed the Germany Army and Wa Pruf 6 officials that, although it was feasible, they did not recommend producing it. Despite removing the turret, the vehicle would have the same weight as an ordinary Panzer IV tank. In addition, the redesign and sloped armor would cause production delays which were not acceptable at that time, so the project was quickly abandoned.

A new start

While the idea for a new StuG vehicle based on the Panzer IV chassis was discarded, several months later, due to desperate necessity, it would come to life again. In November 1943, the Allies heavily bombed the Alkett factory which was instrumental for the overall StuG III production. As the production of vital StuG III vehicles was temporarily stopped, the Germans needed a new quick solution. At a military conference held in early December 1943, Adolf Hitler was informed that the StuG III Ausf.G superstructure could be, with minimal effort, mated with a Panzer IV Ausf.H or J chassis. This time, however, the new vehicle had to have minimal changes to the components used for its construction. The only major modification was the extension of the driver compartment. Hitler was impressed with this proposal, as it would be easy to implement due to available parts and production capabilities. Hitler also suggested giving this new vehicle to the Panzer Abteilungen, as it would facilitate maintenance and procurement of spare parts.

The negative side of this decision was the reduction of available chassis for the Panzer IV tank. But, as the production of the Panzer IV was to be terminated in favor of larger Panther tanks, this was not seen as a huge issue. The actual production of the Panzer IV, due to the high demands for tank vehicles, was never canceled and it lasted almost up to the end of war. As the need for the StuG III vehicles was great, Hitler gave a green light for the realisation of the project.


According to Hitler’s initial orders, the StuG IV was to be produced in great numbers in a short period of time. Some 350 vehicles had to be built in December 1943 and an additional order of 500 to be built by the end of January 1944. Of course, this was impossible to achieve given Germany’s dire economical and industrial situation.

Despite these optimistic numbers given by Hitler, Krupp actually received orders to produce the first 10 trial vehicles at the end of 1943. Nevertheless, Krupp managed to quickly produce 30 vehicles by the end of December 1943. The production goal for January and February 1944 was 210, whereas Krupp managed to produce 214 vehicles. During 1944, monthly production goals were around 90, with the exception (beside January and February) of November, with 100, and December with 110 vehicles. Despite the bad economical situation and the Allied bombing raids, Krupp managed to obtain a relatively smooth production run. 87 vehicles were built in March, 91 in April, 90 in June and July, 70 in August, 56 in September, 84 in October, 80 in November, and 49 in December 1944. In 1945, the production numbers dropped down severely due to many factors, but probably most important were the Allied bombing raids and lack of resources. In January 1945, the number of produced StuG IVs was 46, 18 in February, 38 in March and the last 3 were completed in April. By the time the production run stopped in April, Krupp had managed to produce 1,111 Stug IV vehicles. Beside Krupp, Alkett also produced some 30 StuG IVs with the chassis provided by Nibelungwerke.

Of course, like many other German production numbers, there is some disagreement between authors. The previous mentioned numbers are according to T. L. Jentz and H. L. Doyle in Panzer Tracts No.23 Panzer Production from 1933 to 1945 and Walter J. Spielberger in Sturmgeschütz and its Variants. A. Lüdeke (Waffentechnik im Zweiten Weltkrieg) suggests 1,500 produced vehicles. On the other hand, D. Nešić (Naoružanje Drugog Svetsko Rata-Nemačka) estimates that some 1,139 were built from December 1943 to March 1944 (this year is probably a print or author error). An interesting number is the 632 built vehicles speculated by B. Perrett (Sturmartillerie and Panzerjager 1939-45). This is almost less than half the numbers that all other sources give and it is likely incorrect.

While the final assembly, together with the manufacturing of chassis and running gears, was done by Krupp, all other necessary components were supplied by other companies. Additional frame chassis were supplied by Eisen Hüttenverein, Eisenwerke Oberdonau, Krupp (Essen) and Böhler. The guns were built by Škoda and Wimag. The StuG III superstructure was provided by Brandenburgische Eisenwerke.

One of the first produced StuG IVs at the end of 1943. Source:


Being designed to supplement the StuG III, this vehicle also inherited its name of Sturmgeschütz IV für 7.5 cm Sturmkanone 40. In general, it was also simply known as StuG IV, which this article will use for the sake of simplicity.


As previously mentioned, this vehicle was built using a combination of Panzer IV and StuG III elements. Thus, it was logical that the changes introduced on the StuG III were also implemented on the later StuG IV. The manufacturers of Panzer IV chassis were not always informed in advance for which role their chassis would be used (for ordinary tanks or assault guns). Many changes that were to be introduced to later built StuG IVs were not necessarily always applied to all vehicles.

The Hull

The StuG IV hull was built using surface-hardened steel plates which were welded together. It was divided into the rear engine compartment, the central crew compartment and the forward-mounted transmission and the new enclosed driving compartment. While, originally, the Panzer IV hull had an emergency escape hatch door placed beneath the radio operator’s seat, it was removed on the StuG IV. This was done mainly due to changing the position of the radio equipment.

The front hull was where the transmission and steering systems were placed and was protected with an angled armor plate. To gain better access for repairs, a square-shaped transmission hatch located in the middle of this plate and two rectangular steering brakes inspection hatches with ventilation ports were added.

The Superstructure

The vehicle’s superstructure design was more or less a copy of that of the StuG III. It consisted of a box shaped base with angled frontal armor plates. The most obvious change was the introduction of a new box-shaped driver compartment which protruded to the front. On top of it there was a hatch door and two periscopes with armored covers. Initially, there was a problem with the hatch door accidentally closing back and potentially injuring the driver. Thus, it was changed to include a mechanism that locked the door in the open or closed position. Just above the driver compartment, during the production run, a rain guard was added to avoid water getting to the driver. In addition, as the Panzer IV chassis was longer, next to the new driver compartment, an armored plate was bolted down to fill the gap.

As the Panzer IV chassis was longer than the original StuG III, the opening next to the driver compartment was simply closed up using a bolted plate. This plate is visible just under the main gun. Source: J. Ledwoch Sturmgeschütz

On the top left of this superstructure, a command cupola was placed. On its hatch, there was a second smaller hatch which allowed the commander to use a periscope to observe possible targets. The design of the commander’s cupola changed during the production. Initially, welding was used during its construction while, later in the war, some elements were cast. While a rotary cupola was more desirable, due to production problems, it was only fit from August 1944 onwards. The frontal part of the cupola was reinforced with a protective deflector , which proved to be a weak spot on the earlier StuG III.

In front of the command cupola, there was a sliding plate which held the gunner’s retractable stereo telescope. On the superstructure’s right side, the loader’s two-part hatch was placed. This would be replaced by a single-piece hatch later in production.

Front view of the new box-shaped driver compartment, with its two protected sights. Just above the comparpent, the diagonal line is a rain guard. On top of the superstructure, the commander cupola was placed. Its hatch had an additional smaller hatch that the commander could use for his own telescopic periscope. Source: Walter J. Spielberger Sturmgeschütz and its Variants

From June 1944, the newly produced StuG IV received mounts placed on top of the superstructure. Their purpose was to be used to mount a fold-up crane with a lifting capacity of some 2 tonnes, to help with maintenance and repairs. The superstructure top was held in place by a simple bolt and, if needed (for example to change the gun), could be easily removed. On the rear flat armor of the superstructure, a ventilation port was added. It was protected by an armored cover.

The StuG IVs produced from mid-1944 on had an option to install a 2 tonne crane to help with the vehicle’s repairs and maintenance. Source: Walter J. Spielberger Sturmgeschütz and its Variants
The protective ventilation port is placed to the superstructure’s rear. Note this picture is from a StuG III but the superstructure was in essence the same. Source: Walter J. Spielberger Sturmgeschütz and its Variants

Suspension and running gear

The suspension consisted of eight small (470 x 75 x 660 mm) wheels placed on each side, suspended in pairs and placed on four bogie assemblies. The small road wheels were suspended by leaf-spring units. The distance between each bogie shaft was 500 mm. There were also four return rollers (250 x 65 x 135 mm) on each side. While use of three return rollers per side was tested in June 1944, its implementation on StuG IV vehicles was delayed up to December 1944. Due to the shortage of rubber, steel return rolles were used instead on many vehicles. At the front, two drive sprockets were placed. To the rear, the two (650 mm) idlers had an adjustable track tensioning mechanism.

Close up view of the unchanged Panzer IV suspension. Source:

The ground clearance of this vehicle was 40 cm. While the StuG IV used standard Panzer IV tracks, for operating in the East and during Winter, specially designed and wider Ostketten tracks would be employed.

This vehicle was equipped with enlarged Ostketten tracks. Additional track links were placed on the front of the hull to act as spare parts and improvised armor. Source: Worldwarphotos

The Engine and Transmission

The engine compartment was mostly left unchanged. The StuG IV was powered by a standard Maybach HL 120TRM, which produced 265 [email protected] rpm. With a weight of nearly 26 tonnes (or 23 depending on the source), the maximum speed was 38 km/h (or 20 km/h cross-country) with an operational range of 220 km and 130 km cross country. Some sources give a number of 320 km and 198 km cross country. The fuel load of 450 l (430 and 470 l capacities are also listed in different sources) was stored in three fuel tanks placed under the crew fighting compartment. The engine and the crew compartment were separated by a fire resistant and gas-tight armored firewall. This compartment was provided with an automatic fire extinguisher system. While the Ausf.H chassis used a canister shaped muffler, the later Ausf.J used two vertical Flammentöter mufflers.

The two vertical Flammentöter mufflers indicate that this is a Panzer IV Ausf.J chassis. Source: Pinterest

According to Wa Pruef 6’s instructions to Krupp beginning in March 1944, the auxiliary DKW gasoline engine that was originally used to provide traverse for the Panzer IV’s turret was to be removed from tanks. To use the extra available space, Krupp engineers added additional fuel tanks instead of the DKW engine. While using this as an auxiliary ammunition bin was briefly considered, it would require removing parts of the firewall, which only would delay and complicate production. This also carried over to the StuG IV.

The ZF SSG 75S six-speed (and one more for reverse) transmission was connected to the engine by a drive shaft that ran through the bottom of the fighting compartment. The steering mechanism was the same ‘Wilson’ type which was designed and produced by Krupp.

The Armor Protection

The frontal armor protection of the StuG IV was relatively good. The upper front glacis armor plate was 20 mm thick at a 70° angle, front glacis was 80 mm placed at a 12° angle and the lower glacis was 30 mm placed at a 60° angle. The side armor was 30 mm thick, the rear was 14.5-20 mm and the bottom was 10 mm.

The front superstructure armor was 80 mm thick, with the upper armor 30 mm placed at a 50° angle. The 80 mm thick frontal armor on some vehicles was increased with an additional 30 mm armor plate. The additional armor plate was held in place using six bolts. As this proved too difficult to be accomplished in the field, those that received the extra plate were instead connected using welding. The extended armor plate of the superstructure was 50 mm thick placed at 15° angle. The sides were 30 mm at a 10° angle.

The flat mantle was protected by 50 mm of armor. The rear part of the superstructure was 30 mm thick. The superstructure and engine compartment top parts were 10 mm thick. The commander’s cupola had all-around 30 mm of armor. The new extended driver compartment was protected with 80 mm front and 30 mm side armor.

The StuG IV, similar to many other German vehicles, could be equipped with 5 mm thick side protective skirts, known in German as Schürtzen. The primary mission of these was to provide extra protection from Soviet anti-tank rifles. During rail transport, the protective skirts could easily be taken down and later put back on again. Some were also protected by Thoma Schürtzen wire mesh. While these were lighter and provided the same level of protection, their use was delayed due to problems with production. The use of Zimmerit anti-magnetic mine coating was quite common, though, by the end of September 1944, it was no longer applied to the StuG IV.

A brand new Stug IV with Schürtzen protective skirts. Source Pinterest

Crews would often make improvised attempts at uparmoring their vehicles, hoping to increase the combat survivability of the StuG IV. A somewhat common practise was adding layers of concrete (to a greater or lesser extent) on the front part of superstructure (this was also done on some other vehicles, such as the StuG III). This improvised concrete armor proved to be ineffective in combat. Even the General Artillery Inspector gave a report stating that this improvisation was almost useless. Nevertheless, many StuG IVs continued to receive ‘concrete armor’ up to the war’s end. Other crews added what they had at hand, ranging from captured enemy or own tracks, spare parts, such as road wheels, and some even added logs or ordinary wooden branches. Some vehicles were equipped with extra armor plates welded to the front and placed at great angles. The effectiveness of these improvised attempts was more psychological than realistic.

This vehicle had the usual concrete armor added to the front. The space between the vehicle superstructure and the Schürtzen was filled with wooden branches. Source:
This vehicle had wooden logs put on the superstructure sides. The log may have been used for other purposes too, not just for protection. Source: Pinterest
Besides the concrete armor, the most common practice for the StuG IV (and on many other German vehicles) was to use spare tracks. Sometimes even those captured from the enemy. Source: worldwarphotos
The crew of this particular vehicle (left abandoned in Italy, 1944) added an extensive concrete layer on the driver compartment. In addition, tracks and two armor plates were also added. One extra armor plate was to the front and the second, somewhat unusually, atop the gun mantlet. and Source: J. Ledwoch Sturmgeschütz IV

The Crew and Radio

The StuG IV had a crew of four, which consisted of the commander, gunner, loader and driver. The driver was positioned to the vehicle’s left front side of the hull, in the box-shaped driver compartment. Just behind him was the gunner. To the rear of the gunner was the commander, who had a command cupola for better observation of the surroundings. The last crew member was the loader, who was placed alone on the right side of the vehicle. He was perhaps the most overburdened crew member. Beside his primary role of loading the main gun, he also operated the Fu 15 or 16 transmitter-receiver radio set. This equipment had an effective voice range of about 2 km. A 2 m long antenna rod was fitted on the superstructure. Beside the radio, the crew could use the Walther LP signal pistol to communicate with other vehicles. In addition, the loader was charged with using the machine gun placed on top of the vehicle and using the grenade throwing close defence weapon (if the vehicle had one).

StuG IV crew. Source: Worldwarphotos

The Armament

The main armament of the StuG IV was the 7.5 cm StuK (Sturmkanone – assault cannon) 40 L/48. This gun was developed by Rheinmetall-Borsig especially for the StuG III and was, in essence, a modified 7.5 cm PaK 40 anti-tank gun. The length of the barrel was 3.6 m and had 32 grooves, each 7.8 mm deep and 6.05 mm wide. It had a semi-automatic breech, which means that, after firing, the spent cartridge would be self-ejected, thus increasing the overall firing rate. It was fired electrically.

This gun had a muzzle velocity of 790 m/s. The armor-piercing (Pz.Gr.39) round could penetrate 85 mm of armor (sloped at 30°) at 1 km. The maximum range of the high-explosive rounds was 3.3 km while, for armor-piercing, 1.4 to 2.3 km, depending on the type used. The gunner used the ‘Selbstfahrlafetten Zielfernrohr Sfl.Z.F.1a’ gun sight to acquire targets. This sight had a magnification of x5 and a field view of 8°.

The elevation of this gun went from –6° to +20° (or –5° to +15° depending on the source), while the traverse was 10° (or 20°, depending on the source) to both sides. The ammunition load, depending on the source, consisted of 61 to 63 rounds. The ammunition was stored in holding bins located mostly on the right side of the vehicle, with some placed under the gun or to the back. Krupp specially designed ammunition box containers that were to hold 8 rounds. These could be used on the StuG IV or Panzer IV tanks without problems.

While, initially, the gun was locked at a traverse angle of 0° during driving, this would be changed to 12° later on. The main reason why this was done was to provide the driver with a better view to his right during driving. In addition, a frontal travel lock would be added to a number of vehicles during production.

Behind the gun breach, a small metal shield was placed to provide protection for the gunner. In addition, a shell sack was added to the rear of the gun, which caught spent cartridges. While, initially, the first produced StuG IVs used the earlier box type mantle, this would be replaced by the new cast Saukopfblende (sow’s head mantle), generally known simply as Saukopf.

The dismounted 7.5 cm StuK 40 L/48 gun. Source: Walter J. Spielberger Sturmgeschütz and its Variants

The StuG IV’s secondary armament consisted of one (or two) 7.92 mm MG 34/42 machine guns with 500-600 rounds of ammunition. The MG was not fired from inside the vehicle, but instead was mounted with a protective shield on the superstructure’s top, on the right side. This protective shield could be folded down if needed. Additionally, there were also two different mounting brackets for the MG, depending on if it was used against ground or air targets.

The raised protective machine gun shield is clearly visible in this photograph. Source: worldwarphotos

Some vehicles were equipped with the Rundumfeuer machine gun mount that was operated from inside the vehicle. This mount provided an all-around firing arc. In addition, the operator did not have to expose himself to fire when he was using the machine gun. However, he still needed to go outside to manually load the machine gun. The installation of this machine gun required some changes to the loader’s escape hatch (it had to be rotated at a 90 degree) before being fit to the vehicle. The machine gun was protected by two small angled shields.

Some vehicles received the Rundumfeuer machine gun mount. With this mount, the machine gun operator could fire it without exposing himself to enemy return fire. Source: Pinterest

It is also mentioned that, on rare occasions, some vehicles did not receive the machine guns and were forced to use only high-explosive rounds against enemy infantry, while some vehicles received a coaxial machine gun that was fired by the gunner. The machine gun was fired through a hole that was cut in the gun mantle. This modification was implemented only from June to October 1944 and it is not clear how many vehicles were actually equipped with this machine gun configuration.

Smaller numbers of StuG IVs were equipped with the Nahverteidigungswaffe (close-quarters defense weapon). In essence, this was a close-range grenade thrower that was to be used against infantry. Due to shortages of this weapon, mass use on the StuG IV was not possible. The Nahverteidigungswaffe was placed in front of the loader’s escape hatch. When not installed, the hole was covered by an armored cover.

The close-quarters defense weapon mount was placed in front of the original machine gun mount (the gun itself is missing) on the vehicle superstructure’s top right side. Due to production problems, this weapon was not a common sight in the StuG IV vehicles. Also note that this vehicle had the Rundumfeuer machine gun mount, the installation of which necessitated the redesign of the loader hatch door, which now opened to the side (instead of the original forward and back). Source: worldwarphotos
A close-up view of the Nahverteidigungswaffe (Note that this particular one was used on the Panther tank) Source: S. J. Zaloga Bazooka Vs. Panzer IV

Besides all these, the crews also had their own personal weapons for protection. This usually consisted of one or two 9 mm MP 40 submachine guns and sometimes even a 7.92 mm MP 44 assault rifle.

Distribution to units

The StuG IVs were used to equip various German formations. They were used to supplement assault gun units equipped with StuG IIIs. Which precise assault gun units received the new StuG IV is difficult to pinpoint, as the German documents do not make a distinction between the Panzer III and IV-based vehicles. The first produced StuG IVs were given to the 311th StuG Brigade which operated on the Eastern Front.

By the later stages of the war, German Infantry Divisions were supplemented by a Panzer Jäger Abteilung that contained a company of the towed 7.5 cm PaK 40 guns (or self-propelled versions, if any was available) and one company of 14 assault vehicles. As the StuG IV became available in sufficient numbers, these were also allocated to Infantry Divisions. During 1944, the number of assault vehicles was reduced to only 10.

Other units, such as Panzer, Volksgrenadier, and Panzergrenadier Divisions also received a number of these vehicles. German Panzer Divisions in early 1943 were severely lacking tanks and, for temporary replacement purposes, StuG IIIs were used. By late 1944 and early 1945, for the same reasons, some Panzer Divisions were equipped with StuG IV vehicles as replacements for lost tanks, as there was nothing else available in sufficient numbers.

Lastly, during the summer of 1944, Waffen SS units received some 70 StuG IV vehicles. For example, the 17th SS Panzergrenadier Division, due to an insufficient number of tanks, was instead reinforced with 42 StuG IVs.


The StuG IV, similar to later better-armed StuG III vehicles, were highly effective anti-tank vehicles. For example, the 394th StuG Brigade, which had two StuG IV-equipped batteries, fought the Allies on the Western Front. On 6th August, elements of these units destroyed 26 Allied tanks. The commander of the 3rd Battery claimed to have destroyed six Sherman tanks in combat with his StuG IV.

The previously mentioned 17th SS Panzergrenadier Division, which had 42 StuG IVs, participated in the fighting against the Allies in France. In the following battle with the Allies, it was left with only 11 operational StuG IVs by early July 1944.

A destroyed StuG IV that belonged to the 17th SS Panzergrenadier Division in France, 1944. Source: Pinterest

At the start of October 1944, during the German defense of Aachen against the Allied forces, the 12th Volksgrenadier Division had 10 StuG IV vehicles. These would be reallocated to the 49th Infantry Division several days later. During the Allied attack on Aachen that started on 7th December, they came under fire from the StuG IV vehicles. While the German defenses were breached near Alsdorf, the Allies lost 2 tanks. These were destroyed by Feldwebel Peter Klimas (a veteran with 22 destroyed enemy tanks). The following day, the Germans made a counterattack toward Alsdorf, supported by 6 StuG IVs. During the following engagement, one was lost due to a breakdown, three were lost due to enemy fire and only two managed to reach Alsdorf. These two surviving StuG IV vehicles (one was commanded by Feldwebel Peter Klimas) engaged the Allied forces that held the town. While the German vehicles were heavily involved in the ensuing fighting, the Germans lacked support to retake the town and had to withdraw. While both StuG IVs survived the defense of the Allied soldiers, some even armed with bazookas, they were damaged and Feldwebel Peter Klimas was wounded by enemy rifle fire.

Larger numbers of StuG IVs would see service on the Eastern Front. Some of these were part of the 236th StuG Brigade that fought against Polish Forces in the area of Niesky at the very end of the war in Europe. Another example was the 912th StuG Brigade, which had 30 StuG IV vehicles, all of which were lost by May 1945. Unfortunately, the sources do not give more precise information about the StuG IV’s combat operations in the East.

A StuG IV somewhere in Ukraine, 1944. Source: J. Ledwoch Sturmgeschütz IV

The StuG IV also served in smaller numbers on other fronts, such as Italy or the Balkans during 1944 and 1945. One such unit was the 914th StuG Brigade. Interestingly, this particular unit was supplemented with over 30 Semovente 105/25 M43 Italian assault vehicles.

Some StuG IVs would also be deployed in Greece during 1944. Source: J. Ledwoch Sturmgeschütz IV

One of the last combat actions of the StuG IV was during the defense of Berlin and its surroundings from the Soviets. There were some 29 StuG IVs with the Heeresgruppe Mitte and 20 with Heeresgruppe Weichsel. On 10th April 1945, there were still some 282 StuG IVs available on all fronts. There were 219 on the Eastern Front, 40 in the West, some 16 in Italy, and 7 in Denmark and Norway.

Other Operators

By the end of the war, the Soviets had managed to capture an unknown number of StuG IV vehicles. These vehicles were part of the 912th StuG Brigade which was originally equipped with 30 StuG IV vehicles. At least one was possibly operated by the 366th Guards Heavy Self-Propelled Artillery Regiment during the end of the war in Hungary.

A StuG IV operated by the Soviet Forces during 1945. Source: J. Ledwoch Sturmgeschütz IV

According to B. B. Dumitrijević and D. Savić (Oklopne jedinice na Jugoslovenskom ratištu 1941-1945), some StuG IVs were captured by Yugoslav Partisans and were used for a short time after the war. Their final fate is unknown as none were preserved, and they were probably scrapped.


While, officially, there were no sub-versions of the StuG IV, there were still at least two adaptations of it for other roles. One of these consisted of a StuG IV (minus the weapons) that was equipped with a large fixed dozer blade. This vehicle, named in some sources as the Räumschaufel Panzer StuG IV, was to be used for helping rebuild bombed German cities during the war, by clearing up the remains of destroyed buildings. It is unclear how many were used for this role, but unlikely more than a few. The second version was probably a field conversion, possibly used as an ammunition carried vehicle. Its main gun was removed for some reason (possibly damaged) and replaced with a simple armored shield. How many besides the one photographed were converted is not known.

The StuG IV equipped with the large dozer blade. Source:
Possibly an ammunition supply vehicle field conversion. Source: Pinterest

Surviving vehicles

Despite over 1,000 vehicles being built, today, only a few StuG IVs exist. Two can be seen in Poland at the Armored Weapons Museum in Poznan and White Eagle Museum in the Skarżysko-Kamienna. One more is in the Russian Kubinka Museum. The last vehicle can be found at the Australian Armor and Artillery Museum.

A StuG IV located at the Armored Weapons Museum in Poznan, Poland. Source: Wiki


Despite having been designed as a temporary replacement for its StuG III cousin, the StuG IV was actually produced up to the war’s end. While the Germans also fielded the Jagdpanzer IV anti-tank vehicle also based on the Panzer IV, the StuG IV was much easier and cheaper to produce. It was, in general, a good design with low height, solid armor protection, and a good gun. The downsides of this vehicle were that it was not produced in sufficient numbers and was often used in lieu of other vehicles for roles it was not meant for.

StuG IV, Ukraine, 1943
Sd.Kfz.167 in Ukraine, December 1943.
StuG IV, Ukraine, 1944
StuG IV in Ukraine, early 1944.
StuG IV, Russia
Unknown unit with Schurzen, Russia, summer 1944.
StuG IV with Schurzen
Unknown unit with space armor, Russia, 1944.
StuG IV, Eastern Prussia
StuG IV in Eastern Prussia, September 1944.
StuG IV, Germany
Late production StuG IV in “ambush camouflage”, Germany, April 1945.


Weight 25.9 tonnes
Dimensions Length 6.7 m, Width 2.95 m, Height 2.2 m
Crew 4 (Commander, Gunner, Loader, and Driver)
Propulsion Maybach HL 120 265 HP @ 2600 rpm
Speed (road/off-road) 38 km/h, 15 km/h
Range (road/off-road) 220 km, 130 km/h
Primary Armament 7.5 cm StuK 40
Secondary Armament One 7.92 mm MG 34
Elevation -6° to +20°
Armor 10-80 mm
Total Built 1,141-1,500


WW2 German Assault Guns

38 cm RW61 auf Sturmmörser Tiger ‘Sturmtiger’

Germany (1944)
SPG – 18 Built

Of all of the heavy tank projects from Germany in WW2, one vehicle stands out as something very different from the others and drew significant curiosity from the Allies when they first encountered it. A vehicle combining the armor of a heavy tank with a weapon never fitted to an armored fighting vehicle before, a 38 cm mortar. This incredible vehicle was developed for a specific purpose, urban combat. In such a situation, a huge shell could demolish whole buildings and defensive structures. It could deliver a huge explosive shell at close quarters or be used for long range shelling of an enemy position. That vehicle was the German Sturmtiger.
The origins of the Sturmtiger, or, more correctly, the ‘38cm RW61 auf Sturmmörser Tiger’, started with a call from the German Army (Heer) for a heavy howitzer specifically to help in urban combat, where a well-defended building could hold up an attack or otherwise be resilient against even ‘normal’ caliber artillery fire. What was needed was a gun capable of firing a large explosive shell both directly and indirectly and to have it mounted on a heavily protected chassis. This call was put into reality by Hitler on 5th August 1943, following the failure of other ideas for high-angle guns mounted on tank chassis.

Prototype to production

Despite Hitler’s order to develop a vehicle being issued in August 1943, only one prototype was initially ordered, possibly indicating how much confidence there actually was for such a weapon. Nonetheless, a vehicle was put together based on the chassis of a Tiger tank by the firm of Alkett in Spandau, using an armored superstructure built and assembled by the Brandenburg Iron Works (Brandenburger Eisenwerke) at Kirchmöser. The vehicle was ready and was shown to Hitler at the Ayrs Training Camp in East Prussia on 20th October 1943, an impressive turn-around time of under 3 months.
Despite the impressively rapid construction of a prototype, mass production was severely hampered by the slow rate of manufacturing of Tiger I tanks and was not due to start until mid-1944. Any production of Sturmtigers alongside the Tiger I would have impeded Tiger I production. Since priority was clearly given to the Tiger I tank, the Sturmtiger had to wait. In the meantime, the prototype was undergoing testing and trials.

Prototype Sturmtiger with rubber-tired road wheels. Note: this vehicle is in the possession of the Russian collection at Kubinka with steel-rimmed wheels and the steel counterbalance on the muzzle of the mortar – two later modifications, although it retains the uparmored lower front hull. Source Spielberger. The top image has been colorized by Jaycee ‘Amazing Ace’ Davis.
By May 1944, the Sturmtiger prototype had been kept busy with trials and firing tests for the development of range tables, but production had still not started and the concept was likely to be scrapped. Rather than ditch the idea though, Hitler ordered that, instead of interrupting the production of the Tiger I, the Sturmtigers would be built on the chassis of Tiger I tanks which had already been in action and suffered serious damage. These were being sent back to the factory for rebuilding rather than just for repair. Twelve Sturmtiger units were to be prepared. A Tiger I cost RM250,800 (Reichsmarks) each to build, but as these Sturmtigers were made from rebuilds, it is not possible to calculate the cost of the rebuilding of each hull as each vehicle used had suffered a different amount of the damage. Even so, the cost of building a Sturmtiger was estimated at RM53,000, which, if added to the RM250,000, means that each one constituted an investment of over RM300,000 (approximately US$4,255,264 in 2015 values). This was an enormous sum of money considering it cost just RM117,100 (approximately US$1,660,971 in 2015 values) for a Panther tank.*
*RM to US$ exchange values conducted using Historical Statistics
Twelve Sturmtigers were built which, with the prototype, makes thirteen Sturmtigers finished by the end of September 1944. Five more were ordered by Hitler on 23rd September 1944. Those additional five vehicles were all finished by the end of December 1944, followed by orders for more, although these were never produced. In total, 18 Sturmtigers were built.

Running gear

The running gear for the Sturmtiger was identical to that of the Tiger I with the exception that only the prototype had the rubber-tired wheels. The production Sturmtigers were supposed to be fitted with the rubber-tired road wheels to help manage the additional 8-tonne load of the Sturmtiger over that of the Tiger I, but they all are seen with the steel-rimmed wheels common to late Tigers. The rubber-tired wheels are one of the identification features of the original prototype Sturmtiger, even though even these were later changed to the steel-rimmed wheels. The engine remained the same as on the Tiger I, a Maybach HL 230 TRM P45 and, with the additional weight, the Sturmtiger was markedly slower and less maneuverable than the Tiger I. If a later production damaged Tiger I tank was used to build a Sturmtiger it would be powered by the more powerful Maybach HL 230 TRM P45 V-12 700 hp petrol engine.

Armor and Optics

The lower hull of the Sturmtiger was that of the Tiger I and remained unchanged. Nominally, the armor on the Tiger I consisted of a lower front hull plate 100 mm thick, a short glacis 60 mm thick and a reclined driver’s plate 100 mm thick. The sides were a uniform 80 mm thick and vertical on both lower and upper section, and 80 mm thick on the back. Due to manufacturing tolerance allowance of 0 to +5%, many of these plates ended up being recorded as slightly thicker i.e. 102 mm instead of 100 mm.

For the Sturmtiger, the turret was removed, as was the roof of the hull over the fighting compartment. Further, the driver’s plate was mostly gone, with the top half of it cut-off across the full width. Replacing all of this was a large flat-sided box containing all the crew and the main gun. The front of this box was made from a single slab of armor plate 150 mm thick angled back at 45 degrees which extended down to a point about halfway along the length of the glacis. It was held to the front of the hull by two substantial armor plates bolted over the joint. In the front of the plate was a large, armored ball-mount 69 mm thick for the 38 cm mortar and a small ball-mount for the forward-firing M.G.34 machine gun. The gun and mount were also protected by a 150 mm thick mantlet. On the left of the gun was a rectangular opening which took the aiming telescope and, below this, a pair of small visors under a small cowl were placed for the driver. The sides and rear were made from slabs of armor 80 mm thick but angled inwards towards the roof, which was 40 mm thick. On the prototype, an additional 50 mm thick slab of armor was bolted to the lower front hull of the Sturmtiger, but this feature was dropped from production vehicles, presumably to save weight.

Armor scheme for the Sturmtiger which omits the remnants of the bottom half of the driver’s plate and top part of the glacis which would lie just behind the bottom edge of the 150 mm thick front plate on the Sturmtiger. This scheme also omits the armored mantlet around the gun barrel. Source: Wikipedia

View of the driver’s station at the front-left of the Sturmtiger clearly shows both his vision optics but also that the original glacis was left intact and the original driver’s plate was simply cut off lengthwise for the new front plate. Source: Schneider

Seen from the outside, it is clear that the new front plate significantly overlaps the old armor on the front of the Tiger. The thick block of armor on the corner is there to cover the overlap between the new casemate and the hull. The bolts on the side indicate a reinforcing plate added on the inside joining the two sections together. Source: Schneider
Sighting for the mortar was by means of a Kugeloptik ZF3 x8 sight using the aperture to the left of the main gun and a KgZF2 sight. Other features included the pistol ports on both sides, perhaps more useful for aiding vision than the original intention for them.

Overhead view of a Sturmtiger showing the large rectangular roof hatch used for reloading. Source: The Tank Museum, Bovington

The gun

Originally, the request from the Army called for a 210 mm howitzer but, with no suitable options, they turned to Rheinmetall-Borsig for their Raketenwerfer 61 L/5.4 (Gerat 562 – Sturmmörserwagen 606/4). The gun itself existed in two iterations at the time. One, the R.aG 43 (Raketenabschussgerät 43), was a ship-mounted anti-aircraft weapon used for firing a cable-spooled parachute-anchor creating a hazard for aircraft. The second, the RTG38 (Raketen Tauch Geschoss 38), was a land-based system. Both systems had been made by Rheinmetall-Borsig, in Dusseldorf, but had been designed by MOHRA Gerätebau Aktiengesellschaft Bautsch of Ostsudeten. It was the RTG38 which formed the basis of the weapon in the Sturmtiger. With a range of 3,000 m, it had originally been planned for use in coastal installations by the Kriegsmarine firing depth-charges against submarines. For use in a vehicle, it was to find use as a demolition gun and had to be modified for that role. This modification work was carried out by Rheinmetall at their Sommerda works.
In its coastal defense role against submarines, it was not an effective weapon, and only 12 were made, of which 3 were tested in 4th April 1944 at Trondheimsfjord, Norway. The result was that problems were identified with the fuzing and the rounds failed to achieve the ranges (up to 3,000 m) desired. A second test firing, held on 20th April 1944, revealed an 18% failure rate, likely due to problems encountered when the shell hit the water. Instead, the weapon was selected for use against surface targets and they were based in positions at Fanø Island, Denmark (1 weapon based on the Marine Küsten Batterie Gneisenau) and at batteries at Alta, Agdenes, and Trondheim in Norway (unknown numbers). Two of these weapons are preserved in museums in Copenhagen (Denmark), and Tromsø (Norway), respectively.

R.aG43 at the Tøjhusmuseet in Copenhagen, Denmark, marked ‘bwo 38cm Nr.10’ (left). Unconfirmed RTG38 (possibly a modified RaG43) at the Narvik War Museum (right), the example in Norway appears unmarked or illegible. Source: Massimo Foto on Landships (left) and Yetdark on Flickr (right) Further research on these guns is needed.

Believed to be a R.aG43 on a land mount for coastal defence in Denmark or Norway. Source:
Modified for use in a vehicle, the recoil from the modified rocket-mortar was enormous, about 40-tonnes, and this meant that only a heavy chassis could be used to mount the gun. The only suitable vehicle in Autumn 1943 was the Tiger I.
Some of the gun barrels were modified during production with a heavy steel ring around the muzzle as a counterweight to make elevation easier but, other than the mounting, the gun was effectively the same principle as before. The shells for the weapon were extremely heavy, far too heavy for a man to load manually, at 330 kg each. As a result, each of them had to be carried by means of a ceiling-mounted trolley from their rack to a roller-mounted tray at the breech. Once on the tray, four soldiers could then push it into the breech to load it. The whole process took 10 minutes per shot from loading, aiming, elevating to firing.

Breach of the RW61 with shell absent (left) and being loaded, providing a good view of the vents on the bottom of each shell (right). Source: Schneider (left), Navweaps (right)
The rounds were huge and only 12 rounds could be carried internally on the 6 racks provided, stacked three high and two deep on each side. No special resupply vehicle was provided to carry additional shells but additional shells could be carried in trucks by the unit, which would allow the Sturmtiger to be reloaded having withdrawn from combat. Reloading of these huge shells was carried out by means of a roof-mounted (temporary) crane which was erected on the back of the cab and lowered shells through a removable hatch in the roof of the casemate and down onto the stowage racks.

Reloading process for the Sturmtiger was laborious but straightforward. 1) Unpacking the shell after rolling it into place on a pair of wooden rails. 2) Attaching the clamp for the crane to lift the shell. 3) Hoisting the shell up with crew to keep it steady. 4) Lowering the shell through the roof hatch to be racked inside. Source: Schneider.
Rebuilt for the Wehrmacht, the mortar was named the 38cm Rocket Launcher RW61 (RW – Raketenwerfer) and fired two types of shell, an explosive shell (Raketen Sprenggranate 4581) for general use, and a hollow-charge shell (Raketen Hohlladungsgranate 4592) specifically for targeting reinforced concrete structures, as the warhead could penetrate up to 2.5 m of reinforced concrete. The range, however, was dependent on temperature ranging from a maximum range of 4,200m at -40 C to 5,900m at 50 C, and 6,650m at 15 C. This very large difference in shell performance was because it used a combustion process of propellant as the rocket was fired which was slower-burning in cold weather – the result were very lengthy range/temperature tables for the crew to use in order to accurately lay the gun. Not only was the range affected by temperature but so was shell flight and accuracy. To account for these discrepancies temperature measurement was important in the vehicle and the crew was provided with details range tables listing the elevation, range and temperature in order to maintain accuracy. The minimum range for firing from the tables was just 50 m.
Each shell came in two parts: a case about 550 mm long holding 40.1 kg of diglycol powder (rod form) as the propellant, and the H.E. shell itself carrying 122.5 kg of Amatol 50/50 high-explosive (with six P.E.T.N. pellets acting as the exploders), forming a complete 1,489 mm long (1,440 mm shell and case plus 49 mm fuze) long. Each shell used the same Treibsatz 4581 rocket motor and each case was thin-walled with 32 venturi holes in the bottom to vent out the propellant gases. The venturi holes were angled at 14 degrees to the axis of the rocket, and together with the splines which went into the rifling of the gun caused the shell to rotate clockwise in flight for stability.
Following examination of the records at the Sommerda factories in 1945, it was determined that there were two types of fuzes produced for the Sturmtiger shells. The first was the A.Z.KM 8m.r. (or K.N.9) direct action and delay fuze (percussion fuze with an optional delay of 0.12 seconds) for the High Explosive Shell (4581), and the A.Z.KM.10 hollow charge fuze (nose percussion with no delay) for the hollow charge shell (4592). The delay fuse was found to sometimes malfunction when striking a target at an angle of less than 14 degrees requiring multiple impacts before it would function. When striking a hard target at a steep angle, therefore, the round could actually break up without detonating so the delay on the fuze was not used when firing against hard targets or when the ground was very hard.

38cm Raketen-Sprenggranate 4581 (High Explosive) (left) and 38cm Raketen-Hohlladungsgranate 4592 (right). Source: War Office(UK) 1945 (left) and Navweaps (right)

The disassembled 38cm Raketen-Sprenggranate 4581 (High Explosive) shell with the HE containing section at the front. Source: US Army Catalog of Enemy Ordnance
Elevation was by means of a crank at the left of the mounting and could elevate the gun between 0 and 85 degrees with a traverse-crank over the barrel controlling side-to-side movement. This traverse movement allowed firing up to 10 degrees each way.
The barrel was radically different in design to other guns, with a cast outer body and a liner inside made from steel about 12 mm thick. Into this liner were cut nine rifling grooves into which splines on the rocket would sit and then rotate during firing. During firing, the gases produced were vented through the gap between the inner barrel and the outer barrel sheath. The two pieces of the barrel were held together at the breech and muzzle with steel rings and by drilling 32 holes the gases from combustion could be vented forwards keeping the gas out of the crew space and reducing the recoil of the gun.

Sturmtiger, Warsaw Uprising
Dunkelgelb-camouflaged Sturmtiger used during the Warsaw Uprising.

Sturmtiger, Reichswald
Sturmtiger in a late-war “ambush” camouflage, Reichswald, Germany, February-March 1945.

Sturmtiger receiving ammo
Illustration of a Sturmtiger receiving ammo. This was a tough job, in which the whole crew was involved due to the sheer weight of the shells.


Sixteen of the eighteen Sturmtigers were issued to Sturmmorser Companies 1000, 1001, and 1002 for the defense of the German homeland in 1944. These companies, known as Panzer Sturmmörser Kompanien (Pz.Stu.Mör.Kp.), were originally intended to be issued with 14 vehicles each but, in the end, unit 1000 received just 4 Sturmtigers and 1001 and 1002 received 6 each (16 vehicles). In unit organization, Sturmtigers were paired up, with two vehicles forming a Zug (Platoon).
Pz.Stu.Mör.Kp.1000 was formed from two Zugs for a total of 4 vehicles. It was officially formed on 13th August 1944 and the day after formation, the unit was ordered to form part of Heeresgruppe Mitte (Army Group Mitte) and a force of two vehicles (with personnel from Alkett) was sent (15th to 18th August) to quell the Warsaw Uprising. After this, there were plans to send them to Bratislava (Pressburg) to quell the September 1944 Slovak Uprising, but that rebellion petered out before the unit was sent.
The second Zug of two Sturmtigers was sent to France by the end of August 1944. The first Zug was then sent to Hungary, where it was attached to Panzer-Brigade 109 by the middle of September 1944. By the end of October, the second Zug was withdrawn back to Warsaw and then sent back to Sennelager in Germany for refitting. In December 1944, Pz.Stu.Mör.Kp.1000 had been attached to 15th Armee as part of 6th SS-Panzer-Armee but only had 3 operational vehicles in time for Operation Wacht Am Rhein (Watch on the Rhine) in the Ardennes. As a result of problems with transportation though, these vehicles never reached the starting points for the operation and took no part in the offensive. By the end of January 1945, this unit had been redesignated as an Artillery unit and the strength had been increased to 3 Zugs comprising 6 vehicles.
A record of the use of the Sturmtiger by this unit in combat comes from the unit history for the US 113th Cavalry Group, which recorded that, on 5th February 1945, they were shelled by ten ‘rocket-type’ projectiles which produced huge explosions, followed by two more rounds against the town of Pier. This is believed to be an attack by Pz.St.Mör.Kp.1000 and, when the 113th Cavalry captured the town of Bedburg, they found an abandoned Sturmtiger which is what they ascribed that shelling by rocket-projectiles too. The 737th US Tank Battalion, during actions around the town of Menden, also reported being attacked by a Sturmtiger thought to be from this unit.

Still from a video of the Sturmtiger in combat 1944. Source: Spielberger
Pz.St.Mör.Kp.1001 did not fare much better. Officially formed on 23rd September 1944, the first Zug was not ready until the end of September, followed in the first week of October by the second Zug, but was not combat ready until the end of the month. On 10th November 1944, both Zugs were sent to Oberbefehlshaber West. Just like Pz.St.Mör.Kp.1000, this unit was also deployed for Operation Wacht Am Rhein (Watch on the Rhine) and was also assigned to 15th Armee as a part of the 6th SS-Panzer Armee, again with just 3 vehicles. Unlike Pz.St.Mör.Kp.1000 which did not reach its starting point for the operation, the 3 vehicles of Pz.St.Mör.Kp.1001 did get to the start point. The Operation had called for (amongst other things), the capture of the Belgian city of Liege in the Northern sector of operations. It was for this task that both Pz.St.Mör.Kp.1000 and 1001 were originally intended. As it was, the German forces never got close to Liege and only Pz.St.Mör.Kp.1001 even got to the theatre. Pz.St.Mör.Kp.1000 did not see action during the operation, but Pz.St.Mör.Kp.1001 did, albeit not for its original target of Liege.
Instead, Pz.St.Mör.Kp.1001 saw action around Duren and Euskirchen just before the New Year, covering the retreat of German forces. Just like Pz.St.Mör.Kp.1000, Pz.St.Mör.Kp.1001 was reassigned and, by the end of January, along with Pz.St.Mör.Kp.1000, was redesignated as an Artillery unit with a strength set to be 3 Zugs (6 vehicles).
During action at Duren on 26th February 1945, one Sturmtiger was knocked out when the driver got the vehicle stuck in a ditch along the roadside during the withdrawal from the town. Immobilised, it was shot at least three times in the rear by a Sherman tank of C Company, 743rd Tank Battalion, which was supporting the attack by the 117th Infantry, part of the US 30th Division. With the 80 mm thick rear armor penetrated and the vehicle stuck, the crew bailed out, all had survived these multiple strikes but one crew member was shot and killed by the infantry as they fled. This vehicle was recovered in March 1945 by the 464th Ordnance Evacuation Company and shipped to Great Britain for evaluation. The vehicle was later scrapped but the gun remains on display at the Tank Museum, Bovington.

This Sturmtiger of Pz.St.Mör.Kp.1001, immobilized in a ditch, was hit repeatedly by a Sherman of 743rd Tank Battalion causing the crew to evacuate. Source: Zaloga
The final action of Pz.St.Mör.Kp.1001 took place in the defense of Drohlshagen to the East of Bonn in Spring 1945. Shortly after, with just 3 Sturmtigers left and with serious problems with maintenance, the vehicles were destroyed by the crews prior to capture.
The final company, Pz.St.Mör.Kp.1002, was formed in October 1944 and was sent, in December 1944, to be a part of Oberbefehlshaber West. Just like Pz.St.Mör.Kp.1000 and 1001, it was redesignated as an Artillery unit at the end of January 1945 and was supposed to be increased to a strength of 3 Zugs (6 vehicles). Its combat history started at the battle of the Reichswald followed, in March 1945, by action at Kirschellen. Further actions followed at Polsum, Marl, and Datteln. By the middle of March 1945, the unit had exhausted its supplies and the last two vehicles were blown up by their crews.

Sturmtiger firing one of its 38cm rockets. Source: Spielberger


The Sturmtiger was, in one way, a very clever way of reusing a damaged Tiger-tank hull. The hulls were expensive to make and anything that kept the investment of the Reich in service against the Allies was a good move resource-wise. The logic of the weapon system though is less clear, as by the time they were built they effectively had no role. These might have found in a role in a battle for a city such as at Stalingrad, but that was over well before the first Sturmtiger ever saw service.
The combination of a unique weapons system with very limited utility, on a heavily armored platform was not really what Germany was needing at the time. Better use might have been to consider simply mounting an effective anti-tank gun into that casemate instead, as vehicles like the StuG III had proven their utility as cheap and effective tank destroyers. Even a short-barrelled howitzer of some description might have found a role for infantry support and both ideas would surely have been a better use of those valuable hulls. As a vehicle for assaulting a heavily urban area, when by this time the urban fighting was defensive, it simply had little use. This is proven out by the actual combat history of the Sturmtiger, where it simply failed to find a clear role in the later war, an interesting but essentially useless weapon considering the resources poured into it.

Surviving Vehicles and Guns

Chassis Number 250174 – Deutsches Panzermuseum in Munster (German Tank Museum)
Chassis Number 250043 – Patriot Park, Kubinka, Russia
Sturmtiger 380mm Mortar (no vehicle) – The Tank Museum, Bovington, UK
R.aG43 – Tøjhusmuseet, Copenhagen, Denmark
Unconfirmed RTG38 (possibly a modified RaG43) – Narvik War Museum, Norway

Surviving Sturmtiger at the Deutsches Panzermuseum. Photo: wikimedia

Sturmtiger specifications

Dimensions 6.28 x 3.57 x 2.85 m
Total weight, battle ready 65 tonnes
Crew 5 (Commander, Driver, Gunner, 2 Loaders)
Propulsion Maybach HL 210 TRM P45 21-litre V-12 petrol engine producing 650 hp at 3000 rpm or
Maybach HL 230 TRM P45 V-12 700 hp petrol engine (later production vehicles)
Speed (road) 40 km/h
Armament 38cm RW61 L/5.4 (12 rounds)
MG 34 machine-gun
Armor Casemate front: 150mm @ 47 deg.
Sides and rear: 82mm @ 20 deg.
Roof 40mm @ 0 deg.
Prototype had additional 50mm plate on the lower front of the hull
For information about abbreviations check the Lexical Index


Chamberlain, P., Doyle, H., Jentz, T. (Ed.). (1993). Encyclopedia of German Tank of World War Two. Arms and Armour Press, London, England.
Culler, B. (1989). Tiger in Action. Squadron/Signal Publications, TX, USA
Datenblätter für Heeres Waffen Fahrzeuge Gerät W127. (1976).
Schneider, W. (1986). Elefant, Jagdtiger, Sturmtiger. Schiffer Publishing, PA, USA
US Chief of Ordnance. (1945). Catalog of Enemy Ordnance. US Army.
Willey, D., Hayton,M., Vase, S. (2015). Tiger Tank: Owners’ Workshop Manual. Haynes Publishing Group, UK
Zaloga, S. (2012). Armored Victory 1945. Stackpole Books, PA, USA
War Office. (4th April 1945). Technical Intelligence Summary No.171.

Video of the Sturmtiger featuring footage of it firing

Tanks Encyclopedia Magazine, #2

Tanks Encyclopedia Magazine, #2

The second issue of the Tank Encyclopedia magazine covers the fascinating history of armored fighting vehicles from their beginnings before the First World War up to this day! This issue covers vehicles such as the awe-inspiring rocket-firing German Sturmtiger, the Soviet SMK Heavy Tank, the construction of a replica Italian Fiat 2000 heavy tank and many more. It also contains a modeling section and a feature article from our friends at Plane Encyclopedia cover the Arado Ar 233 amphibious transport plane! All the articles are well researched by our excellent team of writers and are accompanied by beautiful illustrations and period photos. If you love tanks, this is the magazine for you!
Buy this magazine on Payhip!

WW2 German Assault Guns

Sturmpanzer IV Brummbär

Germany (1943)
Heavy Assault Gun – 303-316 Built

Development of the Sd.Kfz.166

In 1942, Albert Speer placed an order for a howitzer mounted on a tank chassis to keep up with the Panzer Divisions. Alkett received the order to design the new vehicle, which would be known as the Sd.Kfz.166, Sturmpanzer, or Sturmpanzer 43. Although commonly referred to as the Brummbär, this was the nickname given to the Sturmpanzer 43 by Allied intelligence, not by the Germans. They referred to it casually as the Stupa 43.

Hello dear reader! This article is in need of some care and attention and may contain errors or inaccuracies. If you spot anything out of place, please let us know!


The chassis was the one of the reliable, mass-produced Panzer IV. Above it, Alkett fitted a massive 15 cm (5.9 in) Sturmhaubitze (StuH) 43 L/12 developed by Škoda, which had common ammunition with the standard siG 33 howitzer in German service. 38 rounds with their separate propellant cartridges were carried, stored in the casemate and the hull. However, these massive rounds had a combined weight of 46 kg (38 kg/84 lb for the High Explosive shell itself and 8 kg/18 lb for its propellant cartridge), which made manual loading especially arduous on some elevations. The gunner set up the trajectory and aimed the gun using a Sfl.Zf. 1a sight.

Hello, dear reader! This article is in need of some care and attention and may contain errors or inaccuracies. If you spot anything out of place, please let us know!

The howitzer was protected by a casemate with sloped sides and thick armor plates. Indeed, this thickness was 100 mm (3.93 in) at a 40° angle on the front, 40 mm/12° (1.57 in) for the front hull, 50 mm/15° (1.97 in) for the side superstructure, 30 mm (1.18 in) for the side of the hull and 30 mm /25°/0° (1.18 in) for the rear of the casemate and 20 mm /10° (0.79 in) for the back of the hull. The top and bottom were protected by 10 mm (0.39 in) of armor at 90°. Outside the main howitzer, a single MG 34 machine gun could be fastened to the open gunner’s hatch, in the same way as for the Sturmgeschütz III Ausf.G. In addition, early vehicles carried a MP 40 sub-machine gun intended to be fired through the two firing ports on each side of the superstructure.
The driver was located forward, slightly in front of the casemate, and was given the Tiger I Fahrersehklappe 80 sight. Ventilation of the casemate’s fumes and heat was provided by natural convection, exiting through two armored covers at the back of the roof. By the time these vehicles were ready, spaced armor became the norm and Schürzen plates were factory-fitted. The first production vehicles proved their superstructure was way too heavy for the chassis, and experienced breakdowns of suspension elements or the transmission. The second series corrected this issue with a newly shaped, lighter casemate. The decision was taken in October 1943 and after the redesign, 800 kg (1,800 lb) of steel were spared, including from the gun mount itself on the third series. This new series was named StuH 43/1. Also, the Zimmerit anti-magnetic coating was factory-applied until September 1944.

Production & variants

Sources conflict as to how many were built, either 306 or 313. There were four series built as follows, all using variants of the Panzer IV chassis.
– Series 1: April 1943 60 built by Vienna Arsenal, with 52 using Panzer IV Ausf.G and 8 using rebuilt Ausf.E chassis.
– Series 2: December 1943-March 1944 60 built at the Vienna Arsenal using Ausf.J chassis.
– Series 3: March-June 1944 Built at Vienna Arsenal.
– Series 4: June 1944-March 1945 Built at the Deutsche Eisenwerke on Ausf.J chassis.
Because of the weight of the gun, there were problems with the suspension of the Brummbär. With Series 4 a new, lighter gun eased the problem considerably; in addition, a MG 34 was mounted for close defense. Previous models had a MG 34 mounted on the commander’s cupola.
The only variant of the Brummbär was a command vehicle, Befehlsturmpanzer IV. It had extra radio capacity. Krupp also built one prototype of a proposed Jagdpanzer IV with a 8.8 cm Pak 43 L/71.

The Sturmpanzer IV in action

The Brummbär primarily saw service in 4 battalions, Sturmpanzer-Abteilungen 216, 217, 218, and 219.
Sturmpanzer-Abteilung 216 first saw action at Kursk, when it formed the 4th battalion of Panzerjaeger 656, where it got as far as Ponyri. Afterwards, it withdrew to defensive positions to repel the Soviet offensive around Orel. As an independent battalion, it next saw service at Anzio in Italy, and from then to the end of the war it withdrew north until the battalion was forced to destroy its remaining vehicles and surrender in the Po valley.
Sturmpanzer-Abteilung 218, raised in August 1944, fought against the Warsaw Uprising, then remained on the Eastern Front until destroyed in East Prussia, in April 1945.
Sturmpanzer-Abteilung 219 fought against the Soviets in the Budapest area. At least two companies of Brummbär-equipped units are known: Sturmpanzer -Kompanie z.d.V. 218 took part in crushing the Warsaw uprising, then incorporated into the Sturmpanzer Abteilungen noted above. Sturmpanzer-kompanie Z.B.V. 2.-/218 was transferred to the Paris area on August 20th 1944, nothing more is known of this unit.
During the battle of Normandy in the summer of 1944, short barrelled 15 cm Sturmpanzer IV ‘Brummbärs’ (Sd.Kfz.166) were deployed to assist in street fighting in the villages and deal with enemy units in fortified locations. They were part of the 217.Sturmpanzer-Abteilung (assault tank battalion). It was formed of three companies of fourteen Sturmpanzer IVs and three additional vehicles used by the command company.
On 24 June 1944 it was ordered to move from Grafenwöhr in Germany to Normandy. On 18 July 1944 the battalion reported that it had reached the area of Condé-sur-Noireau/Le Bény-Bocage and Vire in Normandy. Not all of the Sturmpanzer IVs had completed the journey. Some had suffered mechanical problems.
On 23 July 1944 the 2nd Company was attached to the 21.Panzer-Division. It reported it had eleven working vehicles with two being repaired. On 29 July 1944 it was transferred to the II.SS-Panzer-Division LAH and the next day reported that it now only had nine working vehicles with two in repair.
The 3rd Company had been attached to the II.SS-Panzer Korps. On 30 July 1944, the 3rd Company was transferred to the LXXIV Korps.
On 6 August 1944, Thirteen Sturmpanzer IVs from the 217.Sturmpanzer-Abteilung were reported to be supporting the 89.Infantry-Division. Things changed because on 9 August 1944 ten of these Sturmpanzer IVs were in action with the SS-Panzer-Divison Hitlerjugend on only one was left with the 89.Infanterie-Division.
Some wrecked Sturmpanzer IVs locations were noted following Operation Totalize 8/9th August around the Normandy village of Cintheaux on the Caen-Falaise main road. One was found 1.5 km north west of Cintheaux in the field south east of the junction of the D23 with the road, now track, called La Maisonnette by the cross roads. Two were found near each about 750 m south west of Cintheaux along a track that runs south west from the town limits sign on the D183. A fourth was reported in a field to the west of the D167 about 1 km south south west of Cintheaux.
On 10 August 1944, only five of the ten vehicles were reported in a working condition. The situation was the same the next day. On 11 August 1944 the 1st Company, 217.Sturmpanzer-Abteilung was reported attached to the 271.Infanterie-Division.
On 16 August 1944 the 217.Sturmpanzer-Abteilung reported that between 1 to 15 August 1944 the battalion had lost ten men killed, twelve were missing and thirty-five were wounded. Only seventeen Sturmpanzer IVs were combat ready. Fourteen were under repair and predicted to be ready in less than three weeks.
The Battalion’s remaining Sturmpanzer IVs continued to see action supporting the SS-Panzer-Divison Hitlerjugend and the 89.Infanterie-Division. Both units fought on the same front in Normandy.
Those that escaped the Falase pocket were reformed and saw action during the battle of the bulge, Ardennes offensive. It reached St. Vith, but got no further. The unit was finally captured in the Rhur pocket in April 1945.


Objective Falaise by Georges Bernage
Sturmpanzer-abteilung 216 by Attilios on Panzer-central, World War II German Army Research,, Achtung Panzer
The Sd.Kfz.166 Brummbär on Wikipedia
Sturmpanzer IV article


Dimensions (L-W-H) 5.9 m x 2.8 m x 2.52 m
(19ft 5in x 9ft 5in x 8ft 3in)
Total weight, battle ready 28.2 tons (62,170 lbs)
Armament 15 cm (5.9 in) StuH 43 L/12 (Series 1), StuH 43/1 L/12 (series 2-4) (38 rounds)
7.92 mm Machinengewehr 34 (external machine gun)
Armor 10 mm to 100 mm (0.39 – 3.93 in)
Crew 4-5 (commander, driver, gunner, 2 loaders)
Propulsion Maybach HL120TRM V-12 watercooled, gasoline, 300 bhp (221 kW)
Speed 40 km/h (25 mph) road, 24 km/h (15 mph) off-road
Suspension Leaf springs
Range 210 km (130 miles)
Total production Approx. 316

Sd.Kfz.166 Brummbär, July 1944, Normandy
Early Brummbär from the Sturmpanzer Abteilung 217, Caen area, Normandy, France, July 1944.
Sd.Kfz.166 Brummbär, Warsaw
Early Sd.Kfz.166 from the St.Pz.Abt.218 in Warsaw, August 1944.
Brummbär, Italy, 1944-45
Sturmpanzer Abteilung 216, Italy, fall 1944.
Sd.Kfz.166 Brummbär, Zimmerit
Late production Sd.Kfz.166 Brummbär with Zimmerit paste and metallic rim roadwheels, now preserved at the Saumur Museum.
Sd.Kfz.166 Brummbär, Schürzen, Germany, 1945
Late production Brummbär with the “ambush” type camouflage, Eastern Germany, 1945.


Brummbär at Saumur
Late type Brummbär at the Saumur tank museum, covered with Zimmerit.
Brummbär, front, Saumur museumBrumbär in Italy, Anzio-Nettuno area Brummbär, Deutsch Panzermuseum MünsterFront view of the BrummbärFront right view of the BrummbärBrummbär track detailBrummbär drivetrain detailBrummbär drivetrain detail - leftBrummbär, Aberdeen proving groundsBrummbär next to a Tiger in the Anzio-Nettuno area

Video about the Brummbär

Germans Tanks of ww2
Germans Tanks of ww2

WW2 German Assault Guns

Sturmgeschütz III Ausf.C-G

Germany (1940-1945)
Assault Gun – 9,400 Built

The most prolific German AFV

Production data does not lie. Although quite underrated by Allied intelligence during WW2 and still somewhat underestimated today, the StuG III was, nonetheless, the most produced tracked German AFV during the conflict. Its evolution mirrored that of the more famous Panzer IV. At first, the StuG was a simple derivative of the Panzer III for infantry support only, but ended as one of the most important German vehicles of the war. With its low-profile and low-cost, it was the real battlehorse of the Wehrmacht, shifting from a close support vehicle to a tank-hunter of first magnitude, soldiering without interruption anywhere from North Africa to Europe and Russia. The crews loved it because of its low profile and good armor, and the infantry it was supporting was grateful for its firepower and availability.

Hello dear reader! This article is in need of some care and attention and may contain errors or inaccuracies. If you spot anything out of place, please let us know!

Design of the StuG III

Hull protection

The first production version was based on the Panzer III Ausf.F chassis, and had the frontal armor raised to 50 mm (1.97 in), instead of the 30 mm (1.18 in) of the original pre-series. In detail, the 50 mm (1.97 in) thick driver front plate was inclined to 9°, the hull nose was inclined to 30° and 50°, also 50 mm (1.97 in) thick. The superstructure and hull sides were 30 mm (1.18 in) thick, vertical, while the tail plates, also 30 mm (1.18 in), were inclined at 10 and 30°. The roof was almost horizontal, 10 mm (0.39 in) thick. The rear engine deck was 16 mm (0.63 in), while the belly plate measured 15 mm (0.59 in). The gun mantlet and recuperator were 50 mm (1.97 in) thick. Later, the superstructures sides received 8 mm (0.31 in) additional plates inclined at 30°, and aimed at defeating the French tungsten-core AP shells.


The armored casemate was short and large, covering part of the mudguards after the addition of 8 mm (0.31 in) side slopes. There was a large opening on the front, for the bulky main gun mounting. The frontal double slope was heavily armored, up to 50 mm (1.97 in) on the Ausf.A. There were two small two-piece hatches for the driver at the front, two larger two-pieces hatches for the crew on the casemate rear, and open space at the left for the commander’s periscope. The engine could be accessed through two large two-piece and two smaller one-piece hatches on the rear deck. The driver had a reinforced vision slit and a binocular sight.

Throughout the evolution of the StuG, this frontal part was up-armored, while the up-gunned version had two kind of mountings, the regular one on the Ausf.F and the “pig nose” for the largely overhauled Ausf.G, which helps distinguish between the two models.

Crew positions & equipment

Because of its small height, access was easy through the roof’s hatches. Three were posted directly above the driver (left), gunner (right) and commander’s (left) seats. In addition, if the tank toppled over or if the hatch was obstructed, the driver could still escape through the steering brake inspection hatch in the glacis plate. The driver was given a visor mounted in the front plate and could use the KFF2 periscopes in fully protected mode. He had a fixed sight slit in the superstructure left wall, but was blind on the right. The commander and gunner’s hatches were of equal size, and hinged to the sides. The gunner had a Sfl.ZF periscopic gun sight at his disposal, with an aperture on the superstructure front. The commander had a SF.14Z scissors periscope that protruded from the opened hatch in raised position. Otherwise it was folded down, the binocular being strapped on the left wall. His seat was spring loaded and could be raised while buttoned up, and was adjustable in height, locked into position with a foot pedal. This allowed a fully raised position for direct observation, or with the periscopes. The seat was hinged on the left wall and could be folded out of the way. However, the gunner’s seat was fixed to the gun mount, a common artillery practice.


The main gun was the Krupp 7,5 cm Kanone L/24 (24 caliber long). This was basically a short barrel gun tailored to fire HE rounds at fortifications and enemy positions. It was an adaptation of the 7,5 cm KwK L/24 tank gun originally designed for the Panzer IV. It was well capable of destroying blockhauses and pillboxes at short, medium or even long ranges when in maximal elevation. The 7.5 cm Kampfwagenkanone-37 L/24 was given several types of ammunition during the war. The K.Gr.rot.Pz. was an armor piercing capped shell, the Kt.Kw.K. was a canister, anti-personal shot, the Nbgr.Kw.K. was a smoke round, the Gr.38 Hl/A was the main early High Explosive Anti-Tank round, as well as the /B and /C models. Last but not least was the standard HE round, the 7.5 cm Sprgr.34, which was the heaviest of all (7-8 kg).
The HEAT rounds, especially useful due to the gun’s low velocity (385 m/s), were capable of defeating between 39 and 41 mm (1.54-1.61 in) of armor between 100 and 500 m (110-550 yd), whereas at 2000 m (1.24 mi) it fell to 30 mm (1.18 in) with low hit probability. Normal provision was 54 rounds.
With the arrival of the longer Stu.K. L/40, penetrating ability of the rounds was improved, and a battery of tests followed. As a result, the total load was reduced to 44, and the round proportions were changed. 12% of the shells were K.Gr.rot. Pz (armor piercing, capped, with tracer and explosive filler), 65% were HE rounds, or Sprenggranaten, and 23% smoke shells, or Nebelgranaten. Eventually, a fourth type was introduced, with increased efficiency against armor, thanks to the shaped charge principle. This was the HEAT or Gr.38 HL round. It was designed for excellent fragmentation performance, but was still very effective against softskin targets. The initial design was less successful than the K.Gr.rot. But, after the introduction of the HL/A & B, the numbers supplied to frontline units steadily grew. As an indication, an Ausf.D was captured in North Africa crammed with 88 rounds, including 20 HL/As and 35 K.Gr.rot., signalling an increase in tank to tank use.
Initially, there was no secondary machine-gun, the tank relying solely on accompanying infantry for close quarter defense, which made sense when its tactical use was first envisioned. By the time of the up-gunned G version, however (December 1942), a single Maschinengewehr 34 protected by a mask was mounted on top of the superstructure. Personal weapons included, generally, a MP 38 light machine-gun and several P 38 automatic pistols. For maximal “safe” fire, indirect targeting was used, but at the expense of accuracy. Better accuracy was reached at short range (less than 500 m/550 yd), due to the low velocity of the projectile and possible errors when adjusting the proper arc.
In this matter, the quality of optical instrumentation was paramount. With the Ausf.C, D and E, a new ZF1 targeting sight was introduced, with a reticle pattern including seven triangles separated by four mils. The distances between triangles was used for aiming at moving targets. Their separation and height helped the gunner to estimate the range, marked by 100 m intervals out of a range of 1500 m, with a secondary scale for 6000 m range. Due to the limited arc of 24° (12° on each side), the whole tank had to be moved frequently to deal with relatively close moving targets.


The engine was the mass-produced, dependable Maybach HL 120 TRM V-12 gasoline, giving around 300 PS (296 hp or 221 kW) and a power/weight ratio of 12.6 hp/tonne, connected to a driving six-speed transmission. The wheeltrain comprised six paired rubberized roadwheels mated on torsion arms, and three double return rollers per side. The drive sprockets were at the front, whereas the idlers were at the rear. The tracks were made of mild steel and identical to the Panzer III model.

Performances, facts & figures

Here are the extended specs for the Ausf.D (1941).

  • Top speed: 40 km/h (25 mph)
  • Maximal sustained top speed on road: 24 km/h (15 mph)
  • Cross-country speed: 10-12 km/h (6-7 mph)
  • Range (roads): 155 km (96 mi)
  • Range (cross country): 95 km (60 mi)
  • Trench crossing: 2.5 m (8 ft)
  • Fording: 0.8 m (2ft7in)
  • Step climbing: 0.6 m (1ft11in)
  • Gradient climbing: 30°
  • Ground clearance: 0.39 m (1ft3in)
  • Ground pressure: 0.9 kg/cm2
  • Power to weight ratio: 13.5 metric hp/ton
  • Combat weight: 20.7 metric tons
  • Dimensions (short barrel): 5.40 x 2.92 x 1.95 m (17ft8 x 9ft6 x 6ft4)

The “short barrel” series, Ausf.A to E

These versions were known by the Waffenamt as the Sd.Kfz.142.
Technical drawing of the StuG III Ausf.A-The Ausf.C was only produced for a single month, in April 1941, with 50 vehicles coming out of the factory. Nearly identical to previous versions, they had the main gunner’s forward view port eliminated (it was seen as a shot trap) and replaced by a relocated periscope in the front left of the casemate. The idler was also new. The campaign of France had shown the value of the StuG, and 150 Ausf.Ds were ordered, followed by 500 Ausf.Es.
-The Ausf.D was virtually identical, only receiving an on-board intercom. 150 were delivered between May and September 1941. It was simply an upgrade of the C on the production line. There was, however, a dip in effective deliveries due to the shortage of Maybach HL 120 TRM engines, which were being sent as replacements to the Eastern front depots.
-The Ausf.E replaced the previous version on the production line, with 284 delivered until February 1942. The side superstructure received rectangular armored boxes for extra radio equipment and storing six more rounds (reaching a total of 50), while a MG 34 with 7 drum-type magazines was installed on the right rear side of the casemate for close defense. The commander vehicles were given SF14Z stereoscopic scissor periscopes.

The “long barrel” series, Ausf.F and F8

These series were known by the Waffenamt as the Sd.Kfz.142/1.
-The Ausf.F was an all-out improvement dictated by war experience against Russian tanks and the urgent need for high velocity guns on every platform available. It appeared on the production line in March 1942. The gun was the new 7.5 cm StuK 40 L/43. This 3.3 m long barrel was a real game-changer, with a muzzle velocity of 740 m/s when fed with the armor-piercing Panzergranat-Patrone 39. The Pzgr.Ptr.39 was indeed proven to defeat 99 mm (3.9 in) of sloped armor at point-blank range (100 m), and still 63 mm (2.48 in) at 2000 m. The optimal engagement range was 500 m, due to the lack of a turret, were it could pierce through 91 mm (3.58 in) of armor at a 30° angle slope. This was proven enough to destroy the most common T-34 tanks and saw the role of the StuG shifting from an infantry support vehicle to an ubiquitous tank-hunter. Another change was the exhaust fan added to the rooftop. By June 1942, with the production rate increasing, 30 mm (1.18 in) appliqué armor was bolted to the lower frontal plate, while the gun was upgraded to the StuK 40 L/48. In total, 366 were produced until September 1942.
-The Ausf.F8
This version appeared in September 1942 and 250 vehicles were built up to December. The name was derived from the chassis version of the Panzer III it was based on, the 8th, or Ausf.J/L, which had increased rear armor. The hull was characterized by towing hook holes extended from the side walls. It was armed, from the beginning, with the new 7.5 cm StuK 40 L/48, which could defeat 96 mm (3.78 in) of angled armor at 500 m, and 85 mm (3.35 in) at 1000 m (30° slope). With the same ammunition, the 3.6 m long barrel had better muzzle velocity, reaching 760 m/s for the Pzgr.Ptr.39. After October, 30 mm (1.18 in) of appliqué armor were bolted on to the front during the production run. Some were later retrofitted with side skirt armor.
Technical drawing of the StuG III Ausf.G

The Ausf.G

The Ausführung G stood apart from the other production versions. It was, in essence, the main production run for the entire StuG series, with more than 8400 rolling of the line from December 1942 to April 1945, equivalent to the total production of all Panzer IV types combined. This tremendous effort was due to a complete reorganization (by Albert Speer) of the production, spread between other manufacturers like MIAG (in 1943) and many suppliers. This was done in order to avoid disruptions caused by the increasingly efficient Allied bombing campaigns. It was, of course, further increased by the gradual replacement of the Panzer III with the StuG III on the same production lines.
Simplification and standardization helped to further reduce costs and delays. The main superstructure was simplified. The side sloped armored boxes were eliminated, and the casemate sides were extended half-through the mudguard width. This extra storage allowed to store even more rounds. The engine/fighting compartment rear wall was strengthened, the ventilation fan relocated further back and appliqué armor was standardized. Furthermore, the upper MG 34 was factory-fitted, protected by a squared mask.
By March 1943, simplification pushed to drop the driver’s periscope. Metal return rollers were also required due to the lack of rubber. Rubber saving road wheels had been already tested briefly in November 1942, but not adopted. By May 1943, Alkett started fitting Schurzen (spaced armored side skirts), but it was rushed out and the fixations were later proven inadequate at Kursk (this was corrected in March 1944). 80 mm (3.15 in) armor plates were used instead of appliqué armor. The main gun was unchanged, but characterized by its cast rounded topfblende pot mantlet after November 1943. Postwar, it was called “pig-head” (Saukopf or Saukopfblende). There was no coaxial mount, and the mantlet was 45 mm to 50 mm (1.77-1.97 in) thick. By June 1944, this mantlet was in short supply and the traditional trapezoid-shape mantlet reappeared alongside. In June 1944, it received a coaxial MG 34. Another big change was the adoption of a rotating cupola with periscopes, later replaced by a fixed, welded one, because of the sudden shortage of ball bearings. These had shot deflectors generalized by February 1944. Zimmerit anti-magnetic coating was factory applied for just a year, from September 1943 to September 1944.
In all, Alkett was responsible for delivering 7500 StuGs, while MIAG built 2586. The former also carried out the conversion of 173 older Panzer IIIs to the StuG III Ausf.G standard, and 142 were based on the late Panzer III Ausf.M chassis. The massive bombing raids of November 1943 let Krupp devise a substitute based on their Panzer IV chassis, which was presented and accepted by Hitler in December. This model was known as the Sturmeschütz IV and overall 1140 were built, using a modified StuG III superstructure. Until the end of the war, numerous “field” modifications appeared, as older Ausf.C/Ds were retrofitted with the long KwK 40 L/48 gun, vehicles were repaired and fitted with the Panzer IV cupola, coaxial MG 34s were fitted and some vehicles even had their front supestructure cement-plastered for added protection, while saving steel. There was even a Soviet model built on captured StuG III and Panzer III chassis’ (chiefly at Stalingrad), called the SU-76i, and armed with a Soviet 76.2 mm (3 in) S-1 AT gun, with added protection. No less than 201 were delivered by Zavod 37 at Sverdlovsk, including 20 commander variants. Delivery started in the autumn of 1943, but, in the fall of 1944, they were withdrawn and used for training.

Minor variants

The StuH 42

In 1942, a variant of the Ausf.F received a 4.1 in (105 mm) howitzer under the ordnance name Sturmhaubitze 42, Sd.Kfz.142/2. It was a late reversion to the close infantry support rôle, but with a more modern chassis, as more Ausf.F/8s (long) and Ausf.Gs were used for the antitank rôle. The howitzer was derived from a 10.5 cm leFH 18 with electric fire and a muzzle brake, although the latter was often omitted due to the lack of materials. About 1300 vehicles were built by Alkett from March 1943 to March 1945, after an initial delivery of 12 vehicles tested from repaired F and F/8s between the fall of 1942 and January 1943.
Sturmhaubitze III technical profile

StuG III (Flamm)

In 1943, ten early versions, stored in depots, were chosen to be modified, the main gun being replaced by a Schwade flamethrower. Their operational use however is dubious, as no report stated their use in combat and in 1944 they were returned to the depot.

Sturm-Infanteriegeschütz 33B

As early as 1941, the StuG III chassis was chosen to carry the heavy 15 cm sIG 33 howitzer for close infantry support. Development took time however, and in the end, twenty-four vehicles were so converted and all delivered in October 1942. Twelve of them were diverted to the battle of Stalingrad with the StuG Abteilung 177, and arrived on 8 November 1942, in order to offer an efficient way to to deal with this urban environment. It was already too little too late. All were lost in combat or captured, while the other half was sent to the 23rd Panzer Division. The 15 cm howitzer was the same already used on a Panzer I chassis in 1940, and the Panzer II based “15 cm sIG 33 auf Fahrgestell Panzerkampfwagen II (Sf)” in North Africa. The price tag for the StuIG 33b was 20,450 DM. Thirty rounds were carried in two parts, shells and cartridges, partly stored inside the large bins installed behind the casemate, over the engine deck. The casemate itself was 10 mm (0.39 in) thick, with an extra layer of appliqué armor at the front (20 mm/0.79 in), and entirely enclosed except for the rear, to allow easy access to the ammunition.

Operational history

Tactical doctrine

The manual Instruction of the employment of Sturmartillerie was first published in May 1940 and updated and re-printed in April 1942. By that time, limited war experience permeated the document in a few tactical re-adjustments, whereas advances in technology were more present. Both documents were combined for the second edition, with the contradictions duly noted. It is recalled that due to its nature, infantry support was the vehicle’s chief rôle, with the accompanying morale effect. It was also dependent on infantry in close combat due to its own vulnerabilities: Weak sides, roof and rear armor, lack of visibility, weak arc of fire and, moreover, no close defense system. It is stated that it can be used on the battlefield in the same way as the Panzer IV, and could deal even more successfully with AT guns due to its low profile and thick frontal armor. It could be only “infrequently” used as divisional artillery if the supplies allowed it. It could be attached, however, to theses organic units for special tasks requiring its mobility. It is recalled that it is not to be used for anti-tank tasks, only in case of self-defense. The edition of 1942, due to the improvements in shaped-charge rounds, states that this anti-tank rôle should be plainly approved.
Captured StuGs in Italy
The Sturmartillerie Abteilung, or StuG battalion, comprised a headquarter and three Sturmbatteries, each with six vehicles (three platoons of two StuGs). Revised in 1942, this is raised to seven vehicles, the extra StuG being given to the battalion commander. The Sturmartillerie Abteilungs were independent and only under the High Command authority, but, in some cases, a provisional organic inclusion in Divisions was allowed for special tasks. However, these units were rarely put under the command of an artillery commander. Efficient communication had to be ensured to allow a rapid redeployment of the Abteilung in support of various units inside the Division.
The manual states that the firing positions must be chosen with care, and well camouflaged to hide them from ground, but also air observation. A warning is issued not to split any platoons into smaller units in order to keep some amount of firepower, and only reserve this practice for exceptional short-duration support missions. Security missions, urban combat or night missions were also disapproved. It was recommended to gradually withdraw these platoons for refuelling and re-supply operations at the rear and, in any case, the vehicles had to be thoroughly serviced after 4/5 days of mission. Due to their lack of vision, close infantry cooperation was required to prevent any encounter with obstacles and mines. The rôle of infantry is especially crucial when dealing with possible side and rear enemy infantry attacks. The manual also strongly recommended surprise at any level of the engagement to ensure maximal lethality. Careful pre-positioning, camouflage, sufficient frontal arc of vision and firing without warning were all considered essential. Planning a safe retreat path, without obstacles to safely withdraw for refuelling and rearm is also noted. Smoke ammunition was to be used in this case and to blind the enemy flanking attacks. But, in the 1942 revision, the total allocated for smoke rounds was reduced to 10% of the total.
As breakthrough operations went, the Sturmartillerie Abteilungs only intervened after the breakthrough was done, but right after the first wave of battle tanks, and way before the arrival of tracked artillery and infantry. They were to secure the flanks, like the Panzer IV, of any anti-tank positions, and to prepare the terrain for infantry to follow, destroying fortified positions, especially concrete bunkers. Close cooperation with flame-thrower carrying assault engineers ensured maximal efficiency. It was recalled that only in the case of very close and very strong infantry support should these tanks be used in urban or forested areas.
StuG III of an SS unit in Italy
On the move, it was considered essential for the StuGs to not run at more than 25 km/h (15.5 mph) with large gaps between vehicles and “leap-frog” their way to the objective, allowing the infantry to catch-up and stay close. Crossing bridges had to be carefully handled, at no more than 8 km/h (5 mph) with 30 m intervals. In any case, fording was preferable whenever possible. When operating with an infantry division, the division commander retained the unit as long as possible under his own direct control. They were to be used in the interval between the advanced spearhead and the main body, and only in rare cases on the first line. On the march, they were placed under the column commander authority. With armored divisions they could also find themselves in the advanced guard.
In attack, Sturm. Abt. units were attached to infantry regiments. The manual made it clear that it is questionable to use StuGs for battery tasks on fixed targets, that could be instead disposed of by divisional artillery. The StuGs were best employed to deal with previously unknown enemy positions and nests of resistance, assisting the infantry to carve its way through deep enemy defensive lines, but with a backup of heavy infantry weapons or divisional artillery. In all cases, detailing attack procedures stated that the StuGs had to be ready to intervene after the infantry started the attack, or held in reserve after enemy positions were duly identified. In both cases, never spearheading an assault. The platoon commander was encouraged to constantly cooperate with the most advanced infantry platoons and never be put in control of an artillery commander.
When attacking, their chief targets were enemy AT guns, then fortifications. The initial formation helped make observation easier and favored rapid reaction against any spotted AT position. In case of a defensive action, StuGs were only to be used as a secondary resource, after the AT guns had been decimated or overrun. In that case, the StuGs were to advance to the shortest distance of fire, helped by their low stature. The 1942 manual recommended that 15% of the ammunition had to be AP rounds, instead of the 12% previously mentioned. In pursuit, StuGs had to be kept close to their infantry support at all times, in order to be aware of unseen enemy positions and deal with any resistance. In fighting withdrawal, StuGs were allotted to infantry units and could be used in rear guard actions in support of tanks.
Organisational structure: A Sturmbatterie originally comprised six StuGs -three platoons of two-, five Sd.Kfz.253 light observation halftracks for platoon leaders and battery commanders, six Sd.Kfz.252 light armored ammo carrier halftracks (decreased in 1940 to three each) and three Sd.Kfz.251 Hanomag medium halftracks for the replacement crews. Due to initial production delays, Panzer I, Sd.Kfz.265 recce and Sd.Kfz.111 supply vehicles were used instead. By 7 February 1941, the Sturmbatterie Abteilungs were renamed “Sturmgeschütz Abteilungs” with several “Sturmgeschütz batteries”.

The StuG in action

The StuGs were the unsung heroes of the German defense from 1943 to 1945, with more kills than the Panthers and Tigers altogether (20,000 claimed just in 1944). Their career as support tanks spanned for longer, but they were found efficient against lightly armored vehicles even with HE rounds. Sturmgeschütz crews were artillery men, but considered themselves as an elite, an image reinforced by the propaganda newsreels. Due to its availability, the StuG was used on every single front the Wehrmacht was committed to, from the shores of France and Norway to the Volga in the east, and Africa from the gates of Egypt to the Tunisian hills, and it was also generously distributed along Germany’s allies.
StuG III in Normandy

The Russian campaign (1941-42)

In its first 15 days of operation, Oberleuntnant Pelikan’s StuG unit destroyed 91 tanks and captured 23, destroyed 23 bunkers, ten armored trains and disrupted convoys, claiming hundreds of trucks. After a first engagement at Bialystock, the StuG Abt.285 fought on and built a significant experience on the roads of Leningrad between June and December 1941. Reorganization of the platoons occurred due to the lack of vehicles (only one StuG per platoon) towards the end of the year. The command vehicle was now a Sd.Kfz.253 instead of an open car. It was usual of the StuGs to identify the targets far away first, due to better optical instruments, the infantry providing side and rear close visual cover. In tank-to-tank combat, the StuG III proved superior to any Soviet tank encountered (T-26s and BT-5/7s for the most) until late 1941, when more encounters with the KV-1 drove concerns.
Due to the harsh conditions during the fall of that year, many breakdowns occurred even before the first snow fell, because of the soaked muddy terrain that took its toll in over-stressing the transmission. After that, with the cold sitting down, problems started appearing with the starters, broken torsion bars and broken or torn tracks. The culprit was the snow that, mixed with mud and gravels, froze up each night. Crowbars were used frantically by an exhausted crew each evening and each morning to keep the tank in running order, trying to eliminate the frozen dirt that clogged everything. In this regard, the StuGs did not fare better than the other Panzers, sharing the same mechanical parts on the chassis and narrow tracks more suited for the moderate climate of the west. With such a regime, the Abteilung was left with only ten StuGs operational on 10 December, the situation being even worse for other units. By the 31, the Abteilung 185 lost 6 StuGs in exchange for silencing or capturing 130 artillery pieces, 39 infantry guns, 34 mortars, 79 AT guns, 45 AA guns, 314 MGs, 91 tanks. The unit also spent nearly 60,000 rounds of 75 mm (2.95 in) ordnance of all types.
StuG III in the USSR, summer 1941
Form February to March 1942, Abteilung 185 was resupplied with better HEAT ordnance and claimed more difficult targets, 29 KV-1s, 27 T-34s and 2 KV-2s, but took eight losses. These claims only concerned irreversible losses, like hulls left burning or blatantly destroyed and not lightly damaged tanks that barely lost a track or had a damaged drivetrain. As reported, ammo expenditure was divided into 12,370 HE, 5120 AP, and 1360 HEAT rounds. This figure reflected the success of other StuG Abteilungs in operation on the Eastern Front. Despite having the short barrel, the early StuG Ausf.A to E succeeded in destroying more T-34s than taking losses themselves. But a revolution was brewing, as the new F series was intended to carry the long barrel Stu.K.40 L/43.

The long barrel

Krupp already started worked on the s.Pak L/42 from January 1940, and the project evolved until March 1941. It was then shown to Hitler and an optimistic spring 1942 target was set for production. However, Wa Prüef 4 was ordered to cease work on the new gun design as the OKW, after evaluating the reports from losses due to T-34s and KV-1s, realized that not only protection needed to be increased, but the long barrel gun had to have an even greater muzzle velocity. Wa Prüef 4 then used this letter to require Rheinmetall to design a new gun with a 770 m/s muzzle velocity (with HE) and penetration of 80 mm/30° (3.15 in) at 1000 m. At first, Rheinmetall considered truncating the towed 7.5 cm Pak 40 L/46, born from similar specs. It had to be adapted to be fitted in the StuG casemate, posed recoil problems (90 cm were required) and the rounds were too long (969 mm long). The loading chamber was remodeled and shortened, while the rifled barrel chamber was kept intact. This resulted in the Kanone 40 7.5 cm L/43, complete with new compact shells. The high explosive filler was reduced in size, preventing the shell from breaking up during penetration. The Pz.Granate 39 had an armor piercing cap to prevent shattering on impact and a ballistic cap to reduce air friction, ensuring better velocity. Trials ended in February and production started in March, with 51 deliveries, and 66 in May, before a radical increase. In addition, a removable double chamber muzzle brake with four side ports was added to reduce recoil.
The Sturmgeschutz-Abteilung GrossDeutschland and the LSSAH were the first to receive 22 of the new Ausf.F in operations, built since March-April 1942. At the start of the summer offensive on the Eastern front, there were about 210 Ausf.Fs in operation (18 units). By November 1942, 448 Ausf.F/Gs served with 22 units. By the time Kharkov was retaken in February 1943, GrossDeutschland Division’s StuG units claimed 44 T-34s (whereas the Tigers only destroyed 30). Around Leningrad, the Abteilung 226, with its 41 StuGs (including replacements), claimed an impressive score of 221 T-34s and KV-1s among others, for 13 losses. By March 1943, Abteilung battery composition was changed and increased. By the time the summer offensive started, all 26 units were replenished with new StuG Ausf.Gs, for a total of 727 right before “Zitadelle” took place.
Reports in September showed that, in general, the StuGs fared extremely well (especially compared to the poor performances of the Tiger, Elefant and Panthers), probably giving the best performance so far in combat for any given German AFV. Interogations of captured Russian tank crews revealed that all units were given strict orders to not engage any combat with the StuGs. However, the German losses were attributed to better AT guns served by skillful crews, mines and even better AT rifles that could penetrate the commander cupola. Reports also stated that the regular tanks, like the Panzer IV, were not at ease in this kind of offensive due to their preference for mobility. With less refined optics, a high silhouette and poor cooperation with infantry, they were found less efficient in every way. So much so that it was reported from an anonymous tank commander “I would rather have one StuG Abteilung rather than an entire Panzerdivision”. A total of 423 confirmed kills were reported by the 11 Abteilungen engaged in August 1943, for the loss of only eight vehicles.
During and after the battle, reports also shown the good practice of using Schürzen (spaced) armor, that saved many StuGs from the numerous, well hidden AT rifles and light AT guns the Red Army deployed in prepared positions. Problems were reported with the lightly armored commander cupola and the ineffectiveness of the loader’s machine gun, but also with the engine and transmission. Helped by the flat landscape, the onboard 30-watt radio proved invaluable, with an effective range of 150 km, although sometimes 200 km and more were attained. By February 1944 the former Abteilungen were renamed Sturmgeschütz brigades, 31 vehicles strong each, whereas the Special Brigades 259, 278, 303 and 341 were authorized to have a total of 45 tanks each (14 per battery). In total, since 1940, 57 StuG Abteilungen (Brigades) were formed alongside twelve independent units, and acquired a great deal of experience, showing great versatility with the same success against both infantry and tanks. This was reflected in a very diverse ammo supply. In practice, due to their moral boost effect on the battlefield and to avoid withdrawing to resupply, crews usually preferred cramming extra rounds wherever possible.
According to another report of Hauptmann Markowsky from the III/Panzer-regiment 24, 24th Panzer Division at Krivoi-Rog, the mix of Panzer IV and StuG IIIs also gave excellent results, the StuGs being used like the Panzers, without any form of protection against infantry, and some were detached in the division as an ad-hoc tank-hunter unit. After nine days of heavy fighting, the regiment claimed 184 enemy tanks (mostly T-34s), 87 AT guns and 26 artillery pieces, for only four losses. Results were attributed to excellent training, experience and concentration on the German side. In fact, the attrition rate was mostly attributed to breakdowns. But the Hauptmann insisted that the unit strength was not diminished, but on the contrary, it increased, as instead of 10-15 vehicles per unit, 22 would be preferable.
In December 1943, another report from the III/Panzer regiment 36 stated that at least four scenarios of attack could be successful using StuGs in conjunction with Panzer IVs. One of them was a first wave attack, favored by the StuG low silhouette, spearheading the attack, while the Panzer IVs, with their revolving turret, provided side cover. This was an imperative condition, because if the StuGs were left to simultaneously engage a great number of targets at diverse azimuths, especially on a muddy/snowy terrain, that imposed frequent turns of the chassis and overtaxed the transmission, causing even more breakdowns. It was also noted that the lack of suitable protection for the machine-gun was critical when assaulting enemy infantry positions, due to AT rifle fire. It was also noted that, by far, engagement in close cooperation with Panzer-grenadiers was the most efficient way to deal with enemy infantry positions, both providing a mutual, almost symbiotic protection that worked wonders. In defense, they were also in their element. With their low profile, easy to camouflage, and excellent long-range sights, they could inflict tank damage at a distance without maneuvering, and then retire safely. However, compared results showed the superiority of the Panzer IVs on the offensive. From October to December, 17 Panzer IVs, on average, destroyed 136 enemy tanks, while the 13 StuGs claimed only 75. However, 20 Panzer IVs were complete write-offs compared to only 16 StuGs after 16 days of combat.

North African campaign

The Sonderverband 288 deployed four StuG Ausf.Ds (short barrel version), which participated in the Gazala campaign with Kampfgruppe Menton. One was lost in Piraeus Harbor, and one captured by British armored cars en route. The two surviving were apparently in action at El Alamein (2nd battle). One was apparently used with the 90th Light Division until the surrender in Tunis. When reinforcements arrived in Tunisia, six F/8s from the 1./Sturmgeschütz-Abt. 242 were sent to serve with the Xth Pz. Div., but only four survived the crossing. These were placed with the Fallschirm Regiment Barenthin and Fallschirm Brigade Ramcke and lost in May 1943. StuGs were a rarity in North Africa, contrary to other theaters of operations.

Normandy summer 1944

Among the units which served there was the StuG Brigade 341, which fought at Brecey, Southern Avranches/Pontaubault in late July and Chartres in August. It had Ausf.Gs, as well as a few StuH 42s. Others were the StuG Brigade 394 and 243, the SS-StuG.abt.2, the Panzer Jäger Abteilung 130 and the 902 Sturmgeschütz Abteilung. These were helped, again, by their low profile and, of course, the hedgerow configuration. Also, the 2./Pz.Jg.Abt.331 saw action in the early summer as well as the PzAbt(Fkl)301. As an anecdote, StuG IVs of the 17th SS Pz.Grenadier division “Goetz von Berlichingen” also saw action in the early summer 1944. One was photographed disabled by US. Capt. Taynton after June 15, 1944.


StuH 42s were used by the FschPzDiv “Hermann Goering” in 1944, and the Ausf.Gs of the 15th Panzer Grenadier Division served in Sicily in the fall of 1943 and Italy in 1944. The Sturmgeschütz-Abteilung 107 was active with the XIII SS Corps, 1st Army, Army Group G in northern Italy in 1945. The Sturmgeschütz-Abteilung 242 was transferred in Italy in May 1943 and served later with the OB Süd reserve, based in Liguria in 1945. The Sturmgeschütz-Batterie 247 was formed in March 1943, served in Italy and later Sardinia, then Corsica. In October, it was sent back to Jüterborg and disbanded. Formed in January 1944, the Sturmgeschütz-Abteilung 907 was already sent in Italy, reinforced in Ferentino, and soldiered at Anzio and Monte Cassino. In February 1945 it was based in Liguria. Another “Italian” StuG unit, the Sturmgeschütz-Abteilung 914, was also formed in January and sent to Verona, before being renamed Sturmgeschütz-Brigade 720. It soldiered on with 10th Army in early 1945, then passed into Liguria with the LI Corps, 14th Army and mixed forces also comprising StuH 42s. An independent unit, the Fallschirm-Sturmgeschütz-Brigade Schmitz, was formed in Italy in January 1945 and soldiered on with the I Parachute Corps, 10th Army in Liguria. It was then known as the Fallschirm-Sturmgeschütz-Brigade 210. One of the shortest-lived units was the Sturmgeschütz-Abteilung 107, formed in March 1945 from the remnants of several units and attached to the XIII SS Corps, 1st Army, Army Group G.

StuG aces

The most incredible score was registered by an Ausf.F from the Stug.Abt.244 in Stalingrad in early September of 1942. It was commanded by Oberwachtmeister Kurt Pfreundtner and destroyed nine Soviet tanks in 20 minutes, which earned him the Knights Cross. Wachtmeister Kurt Kirchner (Stug.Abt.667) also succeeded in destroying 30 Soviet tanks in a few days by February 1942 (Northern Russia). Hauptmann Peter Franz, another “Knights Crosser” with the Stug.Abt. “Grossdeutschland”, destroyed 43 T-34/76s at the Battle for Borissovka (March, 14, 1943). Unteroffizier Horst Naumann (Stug.Abt.184) destroyed 12 tanks in a single action in January 1943 in the Demyansk area, and 27 enemy tanks in all. The Stug.Abt.667 was a reserve of talents, like Oberfeldwebel Rudolf Jaenicke (who destroyed 12 BT-2s loaded on rail platforms in July 1941). Von Malachowski and overall Oberwachtmeister Hugo Primozic also had enviable hunting records. Waffen SS StuG ace Walter Kniep, (2nd StuG.Abt., 2nd SS Panzer Division “Das Reich”) claimed 129 Soviet tanks for his unit between July and December 1943, for only two losses.

Other units

Little known were the Luftwaffe independent field units, the Sturmgeschütz-Abteilung 1 der Luftwaffe (formed in January 1944 for the I Fallschirm-Korps), at first partly equipped with Semovente M/42s. It saw action near Nancy (Eastern France) and the Ardennes in the winter 1944-45. The Sturmgeschütz-Abteilung 2 der Luftwaffe was formed in March 1944 and soldiered in Normandy, wiped out at the Falaise pocket and later rebuilt in September in Köln-Wahn. It fought at Arnhem and Amersfoot and in February 1945 at the Reichswald battle.

Other operators

The German allies, Romania, Bulgaria, Hungary, Italy, Spain, and Finland, also operated StuG IIIs.

Italian StuGs

According to Osprey NV StuG III-IV, page 42, three StuG Ausf.Gs were given to the Italian Army in May 1943. Their combat records are unknown. Photos of these are even rarer and did not help to determine their location or type.

Bulgarian StuGs

When the situation was desperate, 55 early type StuG III Ausf.Gs were sent to the Bulgarian ally, between February and December 1943, forming the bulk of the Bulgarian Armoured Division, along with Panzer IVs. At first, two self-propelled gun battalions were created (Sofia and Plovdiv). These were rapidly deployed and fought hard in Hungary in 1945, the survivors being kept into service until the mid-1950s. Photos shown some late Gs with the cast mantlets.

Hungarian StuGs

By June 1944, the 2nd Hungarian Armored Division received 10 StuG III Gs of the late type. Between August to November, Hungary received 40 StuGs to complement the few 43M Zrinyi. The German vehicles were allocated to tank hunter battalions of three batteries each with 10 vehicles. 130 Hetzers were also given in addition, to equip the newly form battalions. The 1st and 10th were equipped with Zrinyis, and the 1st battalion (7th) was equipped with StuGs and the remainder with Hetzers. According to the “Balaton book” these were of the early, mid and late Ausf.G type and some StuH 42s.

Finnish Sturmi

The latter were given in 1943-44 (59 in all) and served against the USSR with great efficiency (the first 30 destroyed 87 Soviet tanks for only 8 losses). 30 were received in 1943 and 29 in 1944. The second batch saw limited if no action. After the war, the StuGs remained frontline in the Finnish Army until better tanks were provided in the early 1960s.

Romanian TAs-3

100 StuGs were delivered in the autumn of 1943 to bolster the Romanian defense, after the crippling losses following the battle around Stalingrad. Officially, these were known as TAs, more precisely TAs T3 (to avoid confusion with the Panzer IV, which were named T4s). By February 1945, only thirteen were left after combat, with the 2nd Armoured Regiment in early 1945, but all were destroyed afterwards. 31 TAs were in inventory in November 1947. They were not survivors, but captured models supplied by the Red Army or damaged and repaired vehicles captured by the Romanian Army. They joined the scrapyard in 1954, due to a decision to use exclusively Soviet equipment.


The Soviets used a few captured units, with specific paintings and large spotting markings. Also, using repaired and captured hulls, they managed to build another 300 SU-76i self-propelled guns and tank hunters, equipped with standard Soviet 76 mm (3 in) guns in 1943-44. A derivative of the latter was the SG-122 “Artsturm”, as nicknamed by the Germans, housing the Soviet 122 mm (4.8 in) standard heavy howitzer. Only a handful (10) were so converted, but the conversion process did not go further, the result being judged unsatisfactory and hard to maintain.


Norway captured many StuGs in 1945, and Sweden tested the type in 1947, received from Norway. It inspired models like the Strv 103. The Norwegian StuGs were kept in service until 1951 and the ten Spanish vehicles until 1954.
After the war, Yugoslavia, Turkey and Syria also received StuGs.

Spanish StuGs

Due to the inadequacy of Spanish tanks in modern warfare, Franco’s Azul Division was given German Panzer IV E/F8 medium tanks, grouped inside the Tank Hunter Battalion 250. The unit was first blooded in October 1941, but the tanks soldiered on until February. The remnants fought a quite extraordinary defensive battle at Krasny Bor on February, 10, 1943, the armor being entrenched and protected. The “blue” division took 75% casualties in the course of the battle, but held its ground and inflicted around 11,000 casualties among Russian attackers.
Other attacks were repulsed later, but the lines became static for months. By October 1943, the Division was eventually replaced by the 81st Infanterie-Division and the 123rd Infanterie-Division, and was retired to Volosovo. In November 1943, a total of ten StuG III Ausf.Gs* were sent to replace part of the losses. But the unit was afterwards convoyed back to Spain, so battle records are unknown for these. (* Osprey NV StuG III-IV, page 42).

Yugoslavian StuGs

These were captured by Partisans and used sometimes on both sides (Ustachis alike). They survived the war and were kept in the new Yugoslav People’s Army for years.

Czechoslovakian Army StuGs

The post WW2 CS Army upgraded the Sturmgeschütz they had in their possession. They added a new shield for machine gun DŠK that was used on the Jagdpanzer 38(t) Hetzer. They were given the following designation Sh PTK 40/75N (years 1946-1949) and SD 75/40N (years 1949-1960). 40 were sold to Syria.

Syrian StuGs

The Syrian army purchased StuGs from France and Czechoslovakia. In 1956 they were deployed alongside Panzer IVs and T-34/85s, reinforced with extra steel plates. By the war of 1967, all were scrapped or stripped for spare parts, the remainder being used in dug-out positions and static pillboxes on the Golan heights. At least one was captured by Israel and is now displayed at Yad-la-Shiron Museum near Tel Aviv.

Links and resources about the StuG III

– Osprey Publishing – Fighting Armour of WW2 collection, Hilary Doyle, Tom Jentz, Peter Sarson, Sturmgeschutz assault gun 1940-42.
– Osprey Publishing New Vanguard 019 – Sturmgeschutz III, 1940-42, by Doyle, Jentz and Sarson.
– Osprey Publishing New Vanguard 037 – Sturmgeschutz III & IV, 1942-45, by Doyle, Jentz, Fuller and Sarson.-
– Osprey Publishing – Sturmartillerie: Spearhead of the infantry, by Thomas Anderson
The StuG III on Wikipedia
The Shadocks document detailing surviving German assault guns
The StuG on Achtung Panzer
A very thorough Russian article about the StuG.

StuG III Ausf.D specifications

4.95m x 2.97m x 2.16m (22ft 6in x 9ft 9in x 7ft 1in)
Track width 41 cm
Track length 12.5 cm
Total weight, battle ready 23.9 tons (52,690 lbs)
Armament 75 mm (2.95 in) StuK 40 L/48
1-2 x 7.9 mm (0.31 in) MG 34
Armor 9 to 60 mm (0.6 – 3.15 in)
Crew 4 (driver, commander, gunner, loader)
Propulsion Maybach HL120TRM V-12 watercooled gasoline, 300 bhp (221 kW)
Speed 40 km/h (25 mph)
Suspension Torsion bar
Range and consumption 155 km (96 mi), 260 l/100 km
Total production 9408 (10,000)

StuG III Ausf.B, Balkans
StuG III Ausf.B of an unidentified Panzergrenadier unit, Balkans, April 1941.
StuG III Ausf.B, Russia, 1941
Ausf.B, Russia, winter 1941-42.
StuG III Ausf.C in Russia
Ausf.C from the 192 Sturmgeschutz-Abteilung, Russia, early 1942.
StuG III Ausf.D, Deutsche Afrika Korps
Ausf.D Sonderverband 288, Deutsche Afrika Korps, 1942.
An upgunned StuG III Ausf.D in Laapland
Ausf.C/D mit 7.5cm L48 and “pig snout”, or Saukopf mantlet, Laapland, 1945.
StuG III Ausf.E
Ausf.E from an unknown unit, Eastern front, autumn 1942.
StuG III Ausf.F
StuG III Ausf.F, Panzer-Abteilung 191, Eastern front, 1942.
StuG III Ausf.F, Grossdeutschland, 1942-43
Ausf.F from the Sturmgeschutz Abteilung 1, GrossDeutschland Division, Russia, 1942-43.
StuG III Ausf.F in Russia
Ausf.F from the Sturmgeschutz Abteilung 210, Russia, 1942-43.
StuG III Ausf.F8, Normandy
Ausf.F8, Normandy, summer 1944.
StuG III Ausf.F, Normandy
Ausf.F/G with an ambush pattern camouflage, Normandy, 1944.
StuG III Ausf.G at Kursk
StuG III Ausf.G, Kursk, summer 1943.
Early StuG III Ausf.G, Tunisia, 1943
Early Ausf.G in Tunisia, February 1943.
StuG III Ausf.G in Dunkelgrau livery, Russia
Ausf.G early type in Dunkelgrau livery, unknown unit, Russia, spring 1943.
StuG III Ausf.G, Panzrgrenadier Division Totenkopf
StuG III Ausf.G from the Abt. Jagdpanzer Grenadier Division “Totenkopf”, Kursk, summer 1943.
StuG III Ausf.G, 23rd Sturmgeschütz Brigade
StuG III Ausf.G from the 23rd Sturmgeschütz Brigade in Russia, late 1943.
StuG III Ausf.G, Kharkov, 1943
Up-armored StuG III Ausf.G from an unidentified unit at the third battle of Kharkov, February 1943.
A StuG III Ausf.G recovered from a swamp in 2002
Ausf.G early type recovered in 2002 from a swamp at Vielike Luki, Russia, previously lost in 1943.
StuG III Ausf.G, Ukraine, fall 1943
Ausf.G early production, Ukraine, fall 1943.
Early StuG III Ausf.G, 202nd Assault Brigade
Ausf.G early production, 202nd Assault Brigade, 15th Panzerdivision, March 1945.
StuG III Ausf.G, Poland, 1944
StuG III Ausf.G operating in Poland, 1944.
Early StuG III Ausf.G, Holland, 1944
Ausf.G, early type, 13th SS Panzerdivision, Frundsberg Maastricht, Holland, September 1944
Finnish Sturmi
Finnish StuG III Sturmi, 1944.
StuG III Ausf.G with the pig snout mantlet
StuG III Ausf.G with pig snout mantlet, Belarus, 1944.
StuG III Ausf.G, Estonia, 1944
Ausf.G of the 2nd PanzerJager Abteilung in Estonia, 12th PanzerDivision, 1944.
StuG III Ausf.G, Laba, Germany
StuG III Ausf.G at Laba, Germany, 1945.
StuG III Ausf G with concrete armour
Ausf.G with extra concrete armor, destroyed in Romania, 1944.
Romanian Tas, Lt.Col. Matei
Romanian TAs of Lt.Col. Matei, September 1944
Romanian TAs in Czechoslovakia
Romanian TAs of the IInd battalion, 2nd Tank Regiment operating in Czechoslovakia and Austria in 1945.
Hungarian StuG III Ausf.G
Hungarian StuG Ausf.G late type of the 7th Assault Gun Battalion, 1944-45.
StuG III Ausf G with extra timber protection
Ausf.G of an unknown unit with extra timber protection, 1944-45.
StuG III Ausf.G, Eastern Hungary, March 1945.
StuG III Ausf.G with Saukopf, Eastern Hungary, March 1945.
StuG III with Saukopf mantlet, Grossdeutschland Division
Ausf.G with Saukopf (late model), GrossDeutschland Division, winter 1944-45.
StuG III command tank, Warsaw Uprising
Ausf.G Funk command tank, Panzer Abteilung 302, 19th Panzerdivision, Warsaw uprising, 1944.
Late StuG III Ausf.G, Hungary, 1945
Late Ausf.G, 7th Assault Gun Battery, Hungary 1945.
StuG III Ausf.G, Eastern Front, 1944-45
Ausf.G, unknown unit, Eastern Front, 1944-45
StuG III Ausf.G, Normandy
Ausf.G of the Panzer Abteilung 301, Normandy, France, 1944.
StuG III Ausf.G of the 2nd Panzerdivision
Ausf.G, 301st PanzerAbteilung (Fkl), 2nd Panzerdivision, Normandy, summer 1944.
StuG III Ausf.G, Warsaw Uprising
Ausf.G, 3rd Company, 302nd Panzer Abteilung, Warsaw uprising, September 1944.
StuG III Ausf.G with concrete armor in American colors.
Ausf.G with Saukopf, protected by concrete armor, captured by the Allies in 1945.
StuG III with Saukopf in Germany
StuG III Ausf.G with Saukopf, 12th Stürmgeschutz-Brigade Germany, February-March 1945.
StuG III Ausf.G in Russia
Sturmgeschutz III Ausf.G, early type, 23rd Sturmgeschutz-Brigade, Russia, 1943.
Another StuG III Ausf.G in Russia
Ausf.G in Russia, unknown sector, 1943.
StuG III Ausf.G in Italy
Ausf.G early type in Italy, 1944.
StuG III Ausf.G, Seelöwe Heights
StuG III Ausf.G, late type, on the Seelöwe Heights, April 1945
StuG III of the 12th Sturmgeschütz Brigade
Ausf.G of the 12th Sturmgeschutz Brigade, unknown location, 1945.
StuG III in Soviet colors
Soviet captured Ausf.G, Eastern Europe, winter 1944-1945.
Another StuG III pressed into service by the Red Army
Soviet captured late Ausf.G in Bohemia, April 1945
StuG III in Syrian service
Syrian up-armored StuG III, with a DshK HMG, in the late 1950s.


German Sturm-Infanteriegeschütz 33B equipped with the 15 cm sIG 33 howitzer for close infantry support, Stalingrad, fall 1942. Only 12 were deployed here, out of the 24 converted.

Sturmhaubitze 1942

StuH 42 prototype
Early prototype (Versurchserie) of the Sturmhaubitze 42.
StuH 42 in Russia
StuH 42 of the early Ausf.G type, with spaced armor, Russia 1944.
StuH 42 in Italy
StuH 42 Ausf.G, Flasshchirmjäger Division Hermann Goering, Italy, mid-1944.
StuH 42 with no muzzle brake
Late StuH 42 without the muzzle brake, one of the few produced in early 1945.


SU-76i, Red Army, Eastern Prussia, late 1944.
SG-122 Artsturm
SG-122 Artsturm, conversion of the SU-76i as a howitzer SPG, 1945 (not to scale).

Video about German assault guns


Leutnant Walther Oberloskamp on his StuG III
Lieutenant Walther Oberloskamp, Zugführer (platoon leader) in the Sturmgeschütz-Brigade 667, proudly showing his 40 victory rings on his personal StuG III. He was awarded, on 10 May 1943, the Knight’s Cross. This photo says scores about the average kill ratio of Sturmgeschutz units in operations – Credits:
StuG III in the Serbian military museumAusf.G in the Serbian military museum of Belgrade, 2008 – Credits: Slaven Radovic.
Another view of the same StuG III in BelgradeAusf G in the Serbian military museum of Belgrade, 2008.
StuG III in HelsinkiAusf.G in Helsinki.
StuG IIIG destroyed in Normandy, summer 1944StuG III Ausf.G destroyed in Normandy, summer 1944, perhaps in the Falaise Pocket.
Captured Syrian Army StuG III Ausf G, Yad-la-Shiron MuseumFront view of a former Syrian Army StuG IIIRear view of a former Syrian StuG IIIPreserved StuG III Ausf.BStuG III, Panzermuseum MunsterStuG III with Saukopf, Zimmerit and SchurzenBulgarian StuG III in SofiaStuH 42 at the Sinsheim museumEarly StuG III near StalingradStuG III preserved at the Dresden museumStuG III, Ukraine, winter 1942Finnish SturmiStuG III at the Belgrade museumStuG III, Brigade 303StuG III, Italy, 1944StuG III at the Koblenz museumStuG III being resuppliedsIG-33B, StalingradSU-76iStuG III production line at AlkettStuG III, Russia, summer 1941StuG III, Eastern Front, December 1942Camouflaged StuG III, Normandy, summer 1944Color photo of a StuG III in RussiaStuG III preserved in RussiaStuG crew on their vehicleEarly StuG III at the Victory Park in MoscowSturmi preserved at HaminaSturmi at the Parola museumStuG III in Russia, fall 1943Romanian TA-3 in MoraviaLate StuG III at the Parola museumStuG III Ausf.F8 at the Kubinka museumStuG III Ausf.G at KubinkaStuG III providing fire support, KharkovStuG III gun replacementSturmi in running orderStuG III as part of a memorialStuG III in Russia, August 1943StuG III attacking with infantrySG-122SU-76iSU-76i with commander cupolaSU-76iSU-76i frontsIG 33b blueprintStuG III Ausf.C blueprintStuG III Ausf.F blueprintStuG III Ausf.G blueprint
Germans Tanks of ww2
Germans Tanks of ww2