The StuG: A new concept in warfare One of only a handful of the brand new StuG III to see service in the West, this dusty StuG III Ausf. A shows the scars of combat on its frontal armour. By the size of the holes, possibly an anti-tank rifle. Location unknown, May/June 1940. In May of 1940, during Operation ‘Fall Gelb’, a new concept made his debut on the battlefield: The Sturmartillerie (Assault Artillery). The Germans called it the Sturmgeschütz (literally Assault Gun), or StuG for shorts.