Wheeler Army Airfield (IATA: HHI, ICAO: PHHI, FAA LID: HHI), also known as Wheeler Field and formerly as Wheeler Air Force Base, is a United States Army post located in the City & County of Honolulu and in the Wahiawa District of the Island of O'ahu, Hawaii. It is a National Historic Landmark for its role in the 7 December 1941 Japanese attack on Pearl Harbor.