The Stug (meaning assault gun) were a series of armoured vehicles used by both the German Army and the SS armored formations during WW II. Initially they were intended as mobile, armored gun platforms, providing fire support to the infantry to destroy bunkers, pillboxes and other entrenched positions. As the war progressed a number of aspects of the StuG series made them a valued supplement to the Panzer forces.The Ausf A version was introduced in time for the Polish campaign of 1939.