It ended officially with the Paris Peace Accords negotiated by Henry Kissenger and ratified by the U.S. Congress.
1955.
President Nixon ended the US offensive participation in the war. President Ford conducted US defensive operations for rescue and evacuation, until the end of the war on 30 April 1975.
No.
They approved the funding.
The TET offensive of 1968 is considered by many to have been the beginning of the US's end of involvement in Vietnam.
Containment .
President Eisenhower sent US Military Advisers to South Vietnam in 1955.
Australia was an ally of the US and sent troops to fight in both WWII and Vietnam.
The United States only committed large numbers of American troops in Vietnam.
{| |- | 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. |}
1. From a guerrilla war to a conventional war. 2. From war in only South Vietnam to open warfare against North Vietnam.
People didn't like conscription.