In June 1965, the 310th Air Refueling Squadron moved to Walker from Schilling Air Force Base. The 310th had supported the Boeing B-47 Stratojets of the 310th Bombardment Wing at Schilling with Boeing KC-97s, but in preparation for its move to Walker, had re-equipped with KC-135s during 1964. This made the 6th a double-sized wing and one of the largest in SAC with its 60 heavy jet aircraft. Soon after, on 8 December 1965, the Department of Defense announced that Walker would close in connection with the drawdown of older model B-52s.