How did the US become involved with the defense of South Vietnam by the time of President Kennedy's assassination in 1963?
Involvement in South Vietnam began in 1953 under the Eisenhower
administration with 900 military advisors and US Air Force pilots
flying for CAT (Air America). When President Kennedy was elected in
November of 1960, Ike advised him that Vietnam and Southeast Asia
were the critical area and needed a high priority for military