Changi Air Base or Changi Air Base (West) (Changi West Complex), formerly RAF Changi, is an airfield military airbase of the Republic of Singapore Air Force located at Changi, in the eastern tip of Singapore. Sited at two locations to the east and west of Singapore Changi Airport, it co-shares runway facilities with the civilian airport and currently occupies a third runway slated for future expansion for civilian use by Singapore Changi Airport. Together, the two airfields house 121 Squadron, 112 Squadron, No 145 Squadron, the Field Defence Squadron, the Air Logistics Squadron and the Airfield Maintenance Squadron. The air base badge carries the motto: "Together in Excellence".HistoryRAF ChangiFirst completed as a British artillery camp in 1940, it was used together with the nearby Changi Prison for housing many of the Allied prisoners-of-war (POWs) after the fall of Singapore in 1942. The construction of the airfield was initiated by the occupying Imperial Japanese forces using those same Allied POWs as forced labourers, building two unpaved landing strips between 1943 and 1944, intersecting in a cross layout and in approximately north-south and east-west directions. The airfield facility became a Royal Air Force station and was renamed RAF Changi in 1946 after the Japanese surrender. Imprisoned Japanese troops were then made to improve the runways, reinforcing the north-south runway for military aircraft and adding perforated steel plates to the east-west runway.