Soviet WW2 era Heavy Tank Built:- 1943 to 1945 Total production:- 3,854 Main Armament:- 122mm D25-T tank gun A successor to the KV series of heavy tanks, the IS-2 went into service in April 1944 and was used as a spearhead by the Red Army in the final stage of the Battle of Berlin. On display at the Central Armed Forces Museum, Moscow, Russia.