Vietnam By Summer 1954 The French Lose Control over Vietnam 1954 Dividing Vietnam 1960 President Kennedy Pledges Support to South Vietnam 1963 The Assassination of Ngo Dinh Diem 1963 A Buddhist Monk burns himself in the streets of Saigon 1963 Kennedy's Assassination 1963 Johnson Sworn in as President 1964 The Gulf of Tonkin 1964 President Johnson increases aid to South Vietnam 1968 The Tet Offensive