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.
Opposition to United States involvement in the Vietnam War the Vietnam War was partly attributed to greater access to uncensored information through extensive television coverage on the ground in Vietnam. Beyond opposition to the draft, anti-war protesters also made moral arguments against U.S. involvement in Vietnam. That moral imperative argument against the war was especially popular among American college students, who were more likely than the general public to accuse the United States of having imperialistic goals in Vietnam and to criticize the war as "immoral." Civilian deaths, which were downplayed or omitted entirely by the Western media, became a subject of protest when photographic evidence of casualties emerged.