world war iii checkpoint charlie is 3 company tsbx39Some Soviet heavy tank battalions are still armed with the IS 3, rather than the T 10M. The IS 3 caused significant alarm in the West when introduced in 1945 due to its powerful armament and advanced protection, which combined raw thickness with complex angles. It would first see its first actions during the Sino Soviet split and subsequent border clashes of the late 1950s. The IS 3 heavy tanks first main combat action was during the 1956 Hungarian