Davis–Monthan Air Force Base (DM AFB) (IATA: DMA, ICAO: KDMA, FAA LID: DMA) is a United States Air Force base located within the city limits approximately 5 miles (8.0 km) south-southeast of downtown Tucson, Arizona. It was established in 1925 as Davis-Monthan Landing Field. The host unit headquartered at Davis–Monthan is the 355th Fighter Wing assigned to Twelfth Air Force, part of Air Combat Command (ACC).