The Soviet

Soviet Union

The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 T-28 was among the world's first medium tank

Medium tank

Medium tank was a classification of tanks; the medium being intermediate in size and weight and armament between heavy tanks and light tanks.The medium tank concept has been eclipsed by the main battle tank.-History:...

s. The prototype was completed in 1931 and production began in late 1932. It was an infantry-support tank intended to break through fortified defences. The T-28 was designed to complement the heavier T-35

T-35

The T-35 was a Soviet multi-turreted heavy tank of the interwar period and early Second World War that saw limited production and service with the Red Army. It was the only five-turreted heavy tank in the world to reach production but proved to be slow and mechanically unreliable...

, with which it shared many components.
The type would not have that much success in combat, but it played an important role as a development project for the Soviet designers.