In August 1964 the Royal Australian Air Force (RAAF) sent a flight of Caribou transports to the port town of Vũng Tàu. By the end of 1964, there were almost 200 Australian military personnel in the Republic of Vietnam, including an engineer and surgical team as well as a larger AATTV team. To boost the size of the Army by providing a greater pool for infantrymen, the Australian Government had introduced conscription for compulsory military service for 20-year-olds, in November 1964, despite opposition from within the Army and many sections of the broader community. Thereafter, battalions serving with 1 ATF all contained National Servicemen. With the war escalating the AATTV increased to approximately 100 men by December.