8th Air Force operated in the United Kingdom from May 1942 until redesignation on 22nd February 1944. It engaged mainly in bombardment of targets in Europe.
306th Bomb Group, U.S.A.A.F., informally known as The Reich Wreckers lost 10 members in transit from 401st Bomb Group when a B-17 crashed on Cave Hill, Belfast.
During the Second World War, members of 325th Service Group served as part of the U.S. Strategic Air Forces Service Command based in Northern Ireland.
3rd Combat Crew Replacement Center operated from Toome Airfield, Co. Antrim, readying pilots and crew for combat in U.S.A.A.F. B-26 Marauders and A-20 Havocs.
91st Bomb Group, U.S.A.A.F., informally known as The Ragged Irregulars sustained more losses in the Second World War than any other U.S. heavy bomb group.