The USAF 4133rd Bomb Wing (Provisional) composed of units from various other wings deployed to Southeast Asia. The B-52F was the first Stratofortress model to participate in combat. The 7th and 320th Bomb Wings bombed suspected Viet Cong enclaves in South Vietnam in June of 1965 under Arc Light. B-52Ds of the 28th and 484th Bomb Wings deployed to Guam in March and April of 1966, replacing the B-52Fs. Over the next few years, 11 more B-52D wings were rotated to combat duty in Southeast Asia. While on duty at Andersen AFB, the B-52Ds were assigned to the 4133rd Bomb Wing (Provisional), which had been established on 01 February 1966. Vintage original Vietnam war machine-embroidered patch, size is 3.25" by 3.75".