The Type 54/55 tanks are a series of Soviet main battle tanks introduced just as the Second World War ended. The first T-54 prototype appeared in March 1945 and entered full production in 1947. It became the main tank for armored units of the Soviet Army and their client states.
The T-54/55 series eventually became the most-produced tank in military history. Estimated production numbers for the series range from 86,000 to 100,000. They were replaced by the T-62, T-64, T-72, T-80, and T-90 in the Soviet armies.