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
1965 in the Vietnam War Vietnam was a matter of much debate. One U.S. government estimate was that the Viet Cong army consisted of 40,000 full-time fighters and 80,000 to 100,000 part-time guerrillas. The Department of Defense's fact book estimated that the Viet Cong numbered less than 200,000 plus 39,175 political cadre. These numbers presumably included thousands of fighters and cadre infiltrated from North Vietnam during the previous five years. The first North Vietnamese army units dispatched to South Vietnam, consisting of three regiments (about 5,000 men), had arrived in South Vietnam in late 1964. A junior-level CIA analyst, Samuel A. Adams, had just begun