The AAPC served in all theatres of World War I as well as staffing the Paymaster’s Branch in London.
Authority to raise Home Forces Citizen Pay Units was provided in 1916, which is currently celebrated as the origin of the Corps.
As the threat of a new war approached a small nucleus of the AAPC was reformed consisting of 40 part-time Citizens Military Force officers.
Correcting this shortage is best illustrated by a true story of a group of recruits at the time: “Prove anyone who worked in a bank”.
During the Vietnam War the RAAPC provided pay support to Australian soldiers in Saigon, Nui Dat and Vung Tau.
Later this support was extended to cover SEATO exercises in Thailand, the Philippines and the survey operations conducted throughout Indonesia and West Irian.