The SU-85 was a Soviet self-propelled gun used during World War II.Its construction was based on the chassis of the T-34 medium tank.Soviet self-propelled guns were meant to serve either as assault guns or as tank destroyers – The SU-85 fell into the latter category.The designation ‘85’ signifies the vehicle’s armament – anti-aircraft gun, the 85mm D-5S gun, characterized by a high rate of fire.The SU-85 was mainly used to eliminate the newest types of German tanks.