In 1951, the 308th was activated as a bombardment unit at Forbes Air Force Base, Kansas, and initially equipped with B-29s. Those aircraft were then replaced with new B-47E Stratojet swept-wing medium jet bombers in 1954, capable of flying at high subsonic speeds and primarily designed for penetrating the airspace of the Soviet Union. Also received KC-97 tankers. Over the next eight years, tie 308th conducted strategic bombardment training and air refueling to meet SAC's global commitments.