War in RVN (South Vietnam) since 1955. War with North Vietnam since 1964.
Preserving the Republic of South Vietnam from being conquered by Communist North Vietnam.
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.
French War '46-'54; American War '55-'75.
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.
Since 1955.
for for years
It lasted 10 years.