The ISU-152 was a Soviet self-propelled gun developed and used during World War II. The ISU-152 continued to be used postwar until the 1970s. It was unofficially nicknamed zveroboy (Russian: Зверобой; “Beast killer”. The ISU-152 was developed to provide the Red Army with a heavy self-propelled assault gun to support infantry and armor in the attack.
Additional Information: en.wikipedia.org/wiki/ISU-152