The T-54 and T-55 tanks are a series of main battle tanks (according to some sources) although not recognized as MBT by Soviet and Russian sources, instead classifying them as medium tanks [1] (the very concept of “main battle tanks” was applied only to tanks beginning with T-64A, armed with 125-mm tank gun) that were designed in the Soviet Union.

The first T-54 prototype appeared in March 1945, just as the Second World War ended. The T-54 entered full production in 1947 and became the main tank for armored units of the Soviet Army, armies of the Warsaw Pact countries, and others. T-54s and T-55s were involved in many of the world’s armed conflicts during the late 20th and early 21st century.