SOMUA S35

SOMUA S35. The SOMUA S35 was a French cavalry tank developed in the mid-1930s and considered one of the most advanced medium tanks of its era at the outbreak of World War II. It featured a well-sloped, cast armour hull, a potent SA 35 gun, and good mobility, serving as the primary armored vehicle of the French Cavalry Corps. Despite its technical qualities, its impact was limited by French doctrine, production numbers, and the strategic circumstances of the Battle of France.

Development and design

The S35 was developed by the Société d'Outillage Mécanique et d'Usinage d'Artillerie (SOMUA) in response to a 1934 specification from the French Cavalry for an Automitrailleuse de Combat (AMC) to equip its light mechanized divisions. The design team, led by engineers at SOMUA, created a revolutionary vehicle that utilized a cast armour hull and turret, a technique also seen on the Renault R35. Its main armament was the excellent 47 mm SA 35 gun, the same weapon used in the Char B1 bis turret, which could defeat most contemporary German tanks like the Panzer III and Panzer IV. The tank was powered by a 190 hp SOMUA V8 petrol engine, giving it a top speed of 40 km/h, and it employed a leaf spring suspension system. A significant tactical limitation was its one-man turret, which forced the commander to also act as gunner and loader, a common flaw in French tanks of the period like the Renault R35.

Operational history

The S35 entered service with the French Army in 1936, equipping the armored cavalry regiments of the 1st Light Mechanized Division and 2nd Light Mechanized Division. During the Battle of France in 1940, these units saw intense combat, notably during the Battle of Hannut and the Battle of Gembloux, where they demonstrated their superiority in direct engagements against the Wehrmacht's Panzer IIIs. However, French doctrine often used them in static defensive roles or in piecemeal counter-attacks, failing to leverage their mobility for concentrated armored thrusts. Following the Armistice of 22 June 1940, approximately 297 captured S35s were refurbished and used by Nazi Germany under the designation Panzerkampfwagen 35-S 739(f), seeing service on various fronts including the Balkans campaign, the Eastern Front, and in Normandy with 21st Panzer Division. Some were also transferred to the Kingdom of Italy for use by the Italian Army.

Variants

The primary variant based on the S35 chassis was the SOMUA SAu 40, a self-propelled gun prototype which mounted a 75 mm APX gun in a fixed superstructure. This vehicle was intended to provide infantry support but never entered mass production. The Germans created several field modifications, including converting some tanks into artillery tractors or ammunition carriers. A proposed but unbuilt upgrade was the SOMUA S40, which was to feature an improved suspension system and welded armour, but its development was halted by the Fall of France.

Operators

The primary operator was the French Army during the early years of World War II. After 1940, the main operator became Nazi Germany, which used the tanks in various secondary roles and in allied units. A smaller number were supplied by Germany to its ally, the Kingdom of Italy. Post-war, a few captured vehicles were briefly evaluated by the United States Army at the Aberdeen Proving Ground and may have been used for training.

Surviving vehicles

Several SOMUA S35 tanks survive in museums worldwide. A notable example is displayed at the Musée des Blindés in Saumur, France. Another is part of the collection at the Kubinka Tank Museum near Moscow. One vehicle is preserved at the Munster Tank Museum in Germany, and a further S35 is located at the American Heritage Museum in Stow, Massachusetts. These vehicles are important artifacts for the study of interwar French tank development.

Category:World War II tanks of France Category:Cavalry tanks Category:Vehicles of the Wehrmacht