Redesignated the 307th Strategic Wing was reactivated at U-Tapao Air Base, Thailand on January 21, 1970, replacing the 4258th Strategic Wing.  The 307th was the only regular Air Force SAC Wing stationed in Southeast Asia.  Using aircraft and crews loaned from other SAC wings, the 307th conducted conventional bombardment operations and provided KC-135 aerial refueling of U.S. aircraft in Southeast Asia as directed through the Military Assistance Command, Vietnam.   It ended all combat operations on August 14, 1973.   The final B-52 left the wing in June 1975, but the wing continued some KC-135 and refueling and RC-135 reconnaissance operations until inactivated.