The Royal Australian Air Force Memorial is on ANZAC Parade, the principal ceremonial and memorial avenue of Canberra, the capital city of Australia. The Royal Australian Air Force was formed on 31 March 1921, being preceded by the Australian Flying Corps that saw service in World War I. This memorial commemorates the 50th anniversary of the formation of the RAAF (initially as the Australian Air Force, the 'Royal' prefix being added in August 1921), and the service of members of the RAAF. It was unveiled by Prince Philip, Duke of Edinburgh on 15 March 1973.