The T-10 was a Soviet heavy tank of the Cold War, the final development of the KV and IS tank series. It was accepted into production in 1952 as the JS-10, but due to the political climate in the wake of Stalin's death in 1953, it was renamed T-10. henceforth Had carried out many times modernized improvement . T-10A in 1956 Improve on T-10 base. Exchanged a new model gun barrel ,and New observation - aims system.