Historic:

The Sturmgeschütz III (StuG III) assault gun was Germany's most-produced armoured fighting vehicle during World War II. It was built on the chassis of the proven Panzer III tank, replacing the turret with an armored, fixed superstructure mounting a more powerful gun. Initially intended as a mobile assault gun for direct-fire support for infantry, the StuG III was continually modified, and much like the later Jagdpanzer, was widely employed as a tank destroyer.

Info: StuG.III Ausf.F StuG.Abt.191, Eastern Front 1942