In order to deal with improved German tanks, the Soviets upgunned the T-34 in 1943, creating the T-34-85. This model had a much larger turret mounting an gun and a larger turret capable of holding 3-men, which finally allowed the tank commander to concentrate fully on maintaining tactical awareness of the battlefield. The Soviets also introduced the 122 mm-armed IS-2 heavy tank, which had heavier armor than the KV while maintaining the same weight. Most of its armor was concentrated in the front of the tank, where it was expected to take most of its hits.