French War '46-'54; American War '55-'75.
Preserving the Republic of South Vietnam from being conquered by Communist North Vietnam.
War in RVN (South Vietnam) since 1955. War with North Vietnam since 1964.
1955-1975.
US Military personnel were in Vietnam from 1955 thru 1975.
i dont no
Peoples lives were shatted, birth defects, etc. Look up Long Term Effects of the Vietnam War on Google.
See: Battle of Long Tan
{| |- | The US involvement in Vietnam began in the 60's. The French had been involved in the war for a long time. Vietnam War went forward for a decade. |}
Because it caused a lot of dead, protests, riots, arguments, and headaches for a very long time.
for for years
Since 1955.
It lasted 10 years.