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
Japanese people in Vietnam to Vietnam. During World War II, on September 22, 1940, Japan invaded Vietnam and began constructing military bases to strike against the Allies in Southeast Asia. Japanese troops remained in Vietnam until their surrender to the Allies in 1945. Some Japanese troops from the IJA stayed in Vietnam and were recruited into the ranks of the Viet Minh as NCO's and Officers were needed to train the Viet Minh in modern tactics. Some also simply assimilated and adopted Vietnamese names, as they had Vietnamese wives and girlfriends. In recent years, many natives of Japan have migrated to Vietnam, mostly to