303rd Air Expeditionary Group

The 303rd Air Expeditionary Group is a provisional United States Air Force unit. In 2011, it was assigned to United States Air Forces Europe to activate or inactivate as needed.

The unit was first activated as the 303rd Bombardment Group in February 1942. During World War II, the 303rd was one of the first VIII Bomber Command B-17 Flying Fortress units in England. The group's "Hell's Angels" is recognized by the USAF as the first B-17 to complete 25 combat missions in the ETO on 13 May 1943, six days before the Memphis Belle, though 12 days after Delta Rebel 2. The group went on to fly more than 300 combat missions, more than any other B-17 group in the theater. The B-17 "Knock-out Dropper" was the first aircraft in Eighth Air Force to complete 50, then 75 missions. The group was awarded the Distinguished Unit Citation for completing an attack against a heavily defended target in January 1944.

The group was twice activated for brief periods by Strategic Air Command (SAC). During the first of these periods, from July 1947 to September 1948, the group was not equipped or manned. It was again activated at Davis-Monthan Air Force Base, Arizona in September 1951. However, SAC reorganized its combat wings to assign operational squadrons directly to the wing headquarters in June 1952 and the group was again inactivated.

Air Force Materiel Command activated the Global Hawk Systems Group in January 2005 during a reorganization called the Air Force Materiel Command Transformation to manage the acquisition and development of the Northrop Grumman RQ-4 Global Hawk. This group was consolidated with the 303rd as the 303rd Aeronautical Systems Group in June 2006. The consolidated group was inactivated in June 2010, when AF Materiel Command returned to its traditional directorate systems management organization.