Eisenhower, Kennedy, LBJ, Nixon, and Ford.
President Eisenhower in 1955 (some sources might state 1954).
President Eisenhower dispatched US military detachments there in 1954 and 1955.
Eisenhower had US personnel present in South Vietnam to help the transition of French withdrawal in 1954; when they were gone, he promptly dispatched US troops to bolster South Vietnamese defenses in 1955.
Under the Eisenhower administration, US Military Advisers were sent to Vietnam in 1955.
Eisenhower, '55
Eisenhower.
Eisenhower sent troops to South Vietnam so they can fight North Vietnam because North Vietnam wanted to take over South Vietnam and they did.
Partition of Vietnam happened in 1954.
Nothing
Eisenhower.
Eisenhower