Eisenhower.
North Vietnam started the war against South Vietnam; the US went to the aid of the South.
The US went, fought, and departed.
Yes.
President Eisenhower sent US Military Advisers to South Vietnam in 1955.
See answer below.
The full might of the US military minus nuclear weapons.
It was obvious North Vietnam wasn't going to quit; so the US declared victory and went home (from the GI's perspective).
The United States went into war with Vietnam in the year 1965.
{| |- | 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. |}
Vietnam is a leading coffee producer in Asia and also is the world's largest producer of Coffea Robusta species of coffee.
Over 11,000 US Servicemen UNDER twenty years old were killed in the Vietnam War.
US Army General Maxwell Taylor went to Vietnam, and on 01 November 1961 wrote a letter to President Kennedy recommending US Troops for Vietnam.