Tanks! Assault Guns and Tank Hunters Sturmgeschtz. Assault guns were primarily used during World War II by the forces of Nazi Germany and the Soviet Union. Early in the war, the Germans began to create makeshift assault guns by mounting their infantry support weapons on the bed of a truck or on obsolete tanks with the turret removed. Later in the war, both the Germans and the Soviets introduced fully armored purpose-built assault guns into their arsenals.
These behemoths could Destroy Any Tank on the Battlefield.

http://en.wikipedia.org/wiki/File:Germany06_086.jpg

http://en.wikipedia.org/wiki/Assault_gun

http://www.achtungpanzer.com/sturmgeschutz-iii-sturmgeschutz-iv.htm

Pt. 1