ISU-122
The ISU-122 (acronym of Istrebitelnaja - or Iosif Stalin-based - Samokhodnaya Ustanovka 122) was a Soviet assault gun used during World War II, mostly in the anti-tank role. == History and purpose == A prototype of the ISU-122 (in Russian ИСУ-122) heavy self-propelled gun was built at the Chelyabinsk Kirov Plant (Chelyabinskiy Kirovskiy Zavod (ChKZ), Chelyabinsk, Russia), in December 1943.