1956
The French war came first (1946-1954).
The battle of Dien Bien Phu which was thought between March 13 - May 7, 1954. Please see the related link.
The first Indo-China war between Vietnamese troops and French forces started in 1946 and ended in 1954 with Vietnamese victory at Dien Biên Phu. US involvement in Vietnam started in 1955.
US involvement began in Vietnam before the French defeat. Military advisers, intelligence, weapons, aircraft and the full support of the CIA's Air America. Vietnam was a French colony from the 1860s till 1940, when it was seized by Japan. Ho Chi Minh organized a resistance movement against the Japanese (and also against French collaborators). In the later stages of World War 2 the U.S. sent miliatary advisers to Ho Chi Minh and President Roosevelt promised the Vietnamese that if they threw the Japanese out of the country they would get independence after World War 2. In 1946 the French 'repossessed' Vietnam and the guerrilla war continued. The French suffered a devasting defeat in 1954 and withdrew. The country was then divided into North and South. The North was Communist; the South was very badly governed by a bizarre anti-Communist regime. Gradually, the U.S. inceased its involvement. Large scale U.S. involvement dates from about 1961 onwards.
It may seem that, due to the way the Vietnam War is portrayed, France only entered Vietnam in the 1940s. In reality, she had held Vietnam at least since 1887. There isn't really a definite date. Essentially, she took Vietnam for the same reason other nations were taking colonies and building empires in the 1800s and earlier - it gave her more power, provided her with more raw materials, and helped her economically. Besides Vietnam, France also held Laos and Cambodia - she named this little patch of her Empire 'Indochina'.
A push factor for Europeans in New France was political and religious turmoil in Europe, leading them to seek stability and opportunities in the colony. A pull factor was the promise of land ownership and economic prosperity through fur trading and agriculture in the new settlement.
Total pull out.
The Vietnam War was the first war to be televised to the public. So America saw everything that was going on in Vietnam and wanted to pull out of the war.
Nixon said that he would pull troops out of Vietnam. Under a plan called "peace with honor", Nixon planned to negotiate an end to the war.
U.S. pull out
Couldn't be won. The North wouldn't quit.
Most of the hippies and liberals did not support the Vietnam. that's why we pulled out of Vietnam during the war. we did not pull out in world war one and world war 2 because america was geared in for the war, but Vietnam, not all of america was in for it.