The wing was reactivated in Thailand in April 1970, replacing the 4258th Strategic Wing. Until inactivated in September 1975, the 307th was the only regular Air Force SAC wing in Southeast Asia. Using aircraft and crews loaned from other SAC wings, the 307th provided KC-135 aerial refueling of U.S. aircraft in Southeast Asia and conducted conventional bombardment operations as directed through the Military Assistance Command, Vietnam (MACV). Ended all combat operations on 14 August 1973. The final B-52 left the wing in June 1975, but the wing continued some KC-135 Air refueling and RC-135 reconnaissance operations until inactivated in September 1975.