Complex sentence: Reactivated in 1972 as a provisional B-52D Stratofortress squadron at U-Tapao Air Base, Thailand, it flew combat missions over Indochina until 15 August 1973 when combat missions ended.
Split into simpler sentences: Reactivated in 1972 as a provisional B-52D Stratofortress squadron at U-Tapao Air Base, Thailand. Flew combat missions over Indochina until 15 August 1973 when combat missions ended.