Operation Crimp Westmoreland requested further reinforcement and US and allied forces increased to 44 battalions which would be used to directly bolster the ARVN. Australia's growing involvement in Vietnam reflected the American build up. In 1963, the Australian government had committed a small advisory team, known as the Australian Army Training Team Vietnam (AATTV), to help train the South Vietnamese forces. However, in June 1965 the decision to commit ground troops was made, and the 1st Battalion, Royal Australian Regiment—originally commanded by Lieutenant Colonel Ivan 'Lou' Brumfield—was dispatched. Supporting 1 RAR was 1 Troop, A Squadron, 4th/19th Prince of Wales's Light Horse
Australian Army Training Team Vietnam later. Serong would later be seconded, and in one capacity or another would remain in Vietnam until the fall of Saigon in 1975, serving as a senior advisor to both the US and South Vietnamese governments. On arrival, the unit joined a large group of US advisors and were dispersed across South Vietnam in small groups. Three groups were dispatched to South Vietnam's northern provinces, training members of the Army of the Republic of Vietnam (ARVN) at the National Training Centre at Dong Da and South Vietnamese Regional Forces (RF) at Hiep Khanh, while a fourth was based at the