The Vietnam War (also known colloquially as Vietnam or Nam as well as the American War or Kháng chiến chống Mỹ, the Resistance War Against America in Vietnam) 1 was a conflict in which the Democratic Republic of Vietnam (DRVN, or North Vietnam) and its allies fought against the Republic of Vietnam (RVN, or South Vietnam) and its allies. North Vietnam's allies included the National Front for the Liberation of South Vietnam, the Soviet Union and the People's Republic of China. South Vietnam's allies included the United States and South Korea. US combat troops were involved from 1965 until their official withdrawal in 1973. A large number of civilian casualties resulted from the war, which ended on April 30, 1975 with the re-unification of Vietnam.
Background
The Vietnam War began after the division of Vietnam into two zones with a de-militarized zone (DMZ) between them. The Vietnam War ostensibly began as a civil war between feuding governments. Being Western-oriented and perceived as less popular than Read more at Wikipedia.org