With the exception of MIAs, all US personnel were out by April '75.
Pragmatism, "realpolitik". Negotiating the US pullout in Vietnam.
Because it was an unwinnable war. They didn't pull out they were defeated and ran.
1961 is the year most accepted by current historians.
Vietnam is a communist country. US forces are not allowed there. However, US veterans visit Vietnam as tourists every year.
Begin with websites: Statistics about the Vietnam War & Vietnam War Time-Line
1965
1944
1975
The United States went into war with Vietnam in the year 1965.
The US entered the Vietnam war after ww2 because the US wanted to control Communism or stop it completely and half of Vietnam was a commie country and the US did not want the Communism to spread so we entered to stop the commie side of Vietnam and to liberate the Democratic side
1978
US POW's were returned in 1973.