US Military advisors were training the ARVNs in April 1956 in Vietnam. There was no "US invasion."
The US was an ally of South Vietnam; it was up to South Vietnam to repel the invasion from the north, with massive military assistance from the US (which, of course, ultimately failed).
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of south Vietnam.
The North Vietnam army was invading South Vietnam and Sv asked the US for help in repeling the Communist invasion.
1974
Japan went into Indochina before the US entered WWII.
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of South Vietnam.
The US was an ally of South Vietnam; it was up to South Vietnam to repel the invasion from the north, with massive military assistance from the US (which, of course, ultimately failed).
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of south Vietnam.
The North Vietnam army was invading South Vietnam and Sv asked the US for help in repeling the Communist invasion.
All out war, minus nukes and invasion of the north.
North Vietnam launched an invasion of South Vietnam.North Vietnam launched an invasion of south Vietnam.
The outcome of the war was the that invasion of South Vietnam by North Vietnam succeeded, and the US failed to prevent the unification of Vietnam into a single, communist country, which it has remained to this day.
Communists did.
The United States only committed large numbers of American troops in Vietnam.
1974
The US objective was to bolster the government of South Vietnam and keep it from being taken over by North Vietnam. The US spent much money and human life trying to achieve this goal, but in 1975 South Vietnam collapsed under a North Vietnamese invasion.
In the Vietnam War the US opposed the invasion of South Korea by North Korea. The fighters from North Korea, who used guerilla tactics, were known as the Viet Cong.