 The 7 BW is one of only two B-1B Lancer strategic bombardment wings in the United States Air Force, the other being the 28th Bomb Wing at Ellsworth Air Force Base, South Dakota.Its origins date to the 1918 establishment of the 1st Army Observation Group (later 7th Bombardment Group), one of the 15 original combat air groups formed by the United States Army before World War II.The 7th Operations Group carries the lineage and history of its highly decorated World War II predecessor unit.