Vietnam War remained in the field for four days. Tellingly, South Vietnamese forces were again defeated in June 1965 at the Battle of Đồng Xoài. On 8 March 1965, 3,500 U.S. Marines were unilaterally dispatched to South Vietnam. This marked the beginning of the American ground war. U.S. public opinion overwhelmingly supported the deployment. The Marines' initial assignment was defensive. The first deployment of 3,500 in March 1965 was increased to nearly 200,000 by December. The U.S. military had long been schooled in offensive warfare. Regardless of political policies, U.S. commanders were institutionally and psychologically unsuited to a defensive mission. General William
Vietnam War Task Force in Phước Tuy Province. Australia, with decades of experience from both the Malayan Emergency and its AATTV role in 1962, recognised the necessity of a true counter-insurgency, which relied on providing village-level security, establishing civilian trust and economic incentives and improving ARVN capabilities. This brought Australian commanders into conflict with Westmoreland's conventional attrition warfare approach, since Australian ground forces were required to follow US doctrine. Nevertheless, Australian forces were generally the most capable at counter-insurgency, and they helped to train Regional Forces despite being under significant doctrinal constraints. Some 10,450 Filipino troops were dispatched to South Vietnam and