In March 1963, the 578th became the 96th wing's sole strategic strike unit, as the wing's three B-47 squadrons were inactivated. This was, however, only a hiatus as the 337th Bombardment Squadron was activated again in September with Boeing B-52 Stratofortresses as part of SAC's program to disperse its B-52 fleet over a larger number of bases, thus making it more difficult for the Soviet Union to knock out the entire fleet with a surprise first strike. July 1964 saw another SAC realignment of its divisions. The 95th wing was reassigned to the 12th Air Division, but its place was taken by another Stratofortress outfit, the 461st Bombardment Wing at Amarillo Air Force Base, Texas. The 461st's time with the division was short, for exactly one year later, its replaced by the 11th Strategic Aerospace Wing at Carswell Air Force Base and the 494th Bombardment Wing at Sheppard Air Force Base, Texas, although the 494th's assignment was temporary, ending in October in preparation for the 494th wing's inactivation as the Air Force began to retire its early model B-52s. The division was inactivated in July 1966 and its 11th and 96th wings were reassigned to the 19th Air Division. Wings  Groups  Other