The 36th Air Division was activated to solve the organizational and jurisdictional problems caused by placing two combat wings at Davis-Monthan AFB in 1951. The division first flew B-29s and B-50 Superfortresses for bombardment operations, but by late 1954 it was completely equipped with B-47 Stratojet medium bombers. Conversion from KB-29s to KC-97s for refueling began in the summer of 1952 and ended in 1954.