The Kliment Voroshilov (KV) tanks were a series of Soviet heavy tanks, named after the Soviet defence commissar and politician Kliment Voroshilov.
The KV series were known for their extremely heavy armour protection, which was capable of resisting all German anti-tank weapons up to 75 mm and 88 mm calibre, both of which were comparatively rare at the time of the initial German invasion of the Soviet Union in World War II.
