IS-4: Invincible Steel, Kind Teammates - World of Tanks

IS-4: Invincible Steel, Kind Teammates - World of Tanks The IS-4 is a Soviet tier 10 heavy tank. The project was developed by the Design Bureau of the Chelyabinsk Kirov Plant starting in December 1943. In April 1944 two prototypes of the Object 701 were built. After prototype trials, the design was improved. In late 1944 and early 1945 two more prototypes underwent trials. The Object 701 No. 5 was recommended for adoption into service. However, production was called off in favor of the IS-3 just entering mass-production.