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.
America in Vietnam America in Vietnam America in Vietnam is a book by Guenter Lewy about America's role in the Vietnam War. The book is highly influential, although it has remained controversial even decades after its publication. Lewy contends that the United States' actions in Vietnam were neither illegal nor immoral, and that tales of American atrocities were greatly exaggerated in what he understands as a "veritable industry" of war crimes allegations. The text returned to the limelight during the 2004 US Presidential Election, when it was cited by several groups supporting the reelection of George W. Bush, in contending that Democratic presidential