Northwest Field is a military airfield on the West Pacific island of Guam. Originally built during World War II, Northwest Field was closed as an airfield in 1949 but has been used for other military activity since, including housing a satellite tracking station, air defenses, and being used for training.

The 315th Air Division is an inactive United States Air Force formation. Originally designated the 315th Bombardment Wing, it was activated in July 1944 at Peterson Field, Colorado as a command organization for four very heavy Boeing B-29 Superfortress bombardment groups. It supervised the 16th, 331st, 501st and 502nd Bombardment Groups in the Mariana Islands during the last stages of the Second World War. Its last assignment was with Pacific Air Forces, based at Tachikawa Air Base, Japan, where the division was inactivated in April 1969.