 The plant also produced more than 100 SU-76i assault guns, a variant of the original Soviet SU-76 based upon the chassis and hulls of captured German Panzer III tanks and StuG III assault guns/tank destroyers, most of which fell into Soviet hands following the German defeat at the Battle of Stalingrad in early 1943.After World War II, the state made large investments in the reconstruction and expansion of the Uralmash plant.This modernisation favoured both increased output and the production of new machines and equipment—shovels, drilling rigs, crushers and mills.