Marine Corps Air Station Kaneohe Bay or MCAS Kaneohe Bay (IATA: NGF, ICAO: PHNG, FAA LID: NGF) is a United States Marine Corps airfield located within the Marine Corps Base Hawaii complex, formerly known as Marine Corps Air Facility (MCAF) Kaneohe Bay or Naval Air Station (NAS) Kaneohe Bay.
The United States Army acquired 322 acres (1.30 km2) of the peninsula when President Woodrow Wilson signed executive order 2900 establishing the Kuwaaohe Military Reservation. Little is known about the operations of the fort, however, at the end of World War I, the military property was leased for ranching. In 1939, Kuwaaohe was reactivated, subjected to many name changes to include Camp Ulupa’u, and eventually named Fort Hase. Prior to and during World War II, Fort Hase grew from a humble beginning as a defense battalion to a major unit of the Windward Coastal Artillery Command. Navy planners began to eye the peninsula in 1939 as the home of a strategic seaplane base. They liked the isolated location, the flat plains for an airfield and the probability of flights into prevailing trade winds. In 1939, the Navy acquired 464 acres (1.88 km2) of the peninsula for use of the PBY Catalina Patrol seaplanes for long-range reconnaissance flights. One year later, the Navy owned all of the Mokapu Peninsula except for Fort Hase.