France
The United States was tempted to help France fight the communists in Vietnam. In the 1950s, the American government sent millions of dollars of assistance to France to help with these efforts.
austraila and france
The US offered to help south Vietnam in 1961 to help Vietnam preserve its independence from the North. It was during the Cold War, and the US was fighting Communist Russia across the world.
US sent military aid to France in 1940 to help them take over Vietnam.
RVN (Republic of South Vietnam); which no longer exists.
Actually in the agreement was to help the french subdue Vietnam in exchange, France would help the the US in all future wars. Hence our utter disgust and vile sickness of Americans when France would not join us in Afghanistan or Iraq.
The US (not called the US back then, but the 13 colonies) separated from Great Britain during the Revoluntionary War of 1776. Vietnam separated from France during the French Indo-China War 1946-1954.
The US aided France during the 1st Indochina War, aka French Indochina War, aka the French War.
France
South Vietnam was considered an ally of the US.
US assistance to France was the precursor and the introduction of Army advisors was the actual point of US entry into the Vietnam War.