History of Vietnam since 1945 unstable as no government could keep power for long. There were more coups, often more than one every year. The Communist-run Viet Cong expanded their operation and scored some significant military victories during this period. In 1965, US President Lyndon Johnson sent troops to South Vietnam to secure the country and started to bomb North Vietnam, assuming that if South Vietnam fell to the Communists, other countries in the Southeast Asia would follow, in accordance with the domino theory. Other US allies, such as Australia, New Zealand, South Korea, Thailand, the Philippines, and Taiwan also sent troops to South Vietnam.
1961 in the Vietnam War The NSAM also called for South Vietnam to improve its military establishment and mobilize its resources to prosecute the war. Thus, Kennedy stopped short of what many of his advisers, including General Taylor, had advised: the introduction of U.S. combat soldiers into South Vietnam. Kennedy's decision not to introduce combat troops surprised the Defense Department which had been assembling forces to be assigned to Vietnam, including Farm Gate aircraft. However, Kennedy's decision was a visible and undeniable violation of the Geneva Accords of 1954, still technically in force. President Kennedy approved the use of herbicides in Viet Nam to kill