After the United States' entry into World War II, Fort Dix Army Air Base was used as a training and facility for numerous service units under First Air Force. Once organized and prepared for overseas duty, these units provided support and technical sections for the group requirements as a whole: "Flying control", "Ordnance", "airfield security", "firefighting", "Post Exchange" (PX), "Special Services", "Mail", "Transportation" ("motor pool"), "Communications", "Radar", "Gunnery instruction", "Personal Equipment", and "Weather" (Meteorology). The service group also had its own mess section. The service group had approximately 30 officers and 300 to 400 enlisted men. This training continued until 1944.