The T-100 tank was a Soviet heavy tank prototype designed in 1938-39 as a potential replacement for the T-35. It was developed by the OKMO design team at the S.M. Kirov Factory No. 185 in Leningrad.
The T-100Z tank, also known as the SU-100Y, was a self-propelled gun was a twin-turreted Soviet heavy tank designed in 1938-39, intended to replace the aging T-35 tank. The SU-100Y was used in the defense of Moscow in 1941.
