The Soviet T–28 was a multi-turreted tank that was among the world's first medium tanks. 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 (also multi-turreted), with which it shared turret designs. The type did not have much success in combat, but it played an important role as a development project for the Soviet designers. A series of new ideas and solutions were tried out on the T–28 which were later incorporated in future models.