Vietnam War By cat 1954 The Dividing of Vietnam 1954 President Eisenhower Pledges Support to South Vietnam 1956 Ngo Dinh Diem refuses to hold the elections 1960 President Kennedy Pledges Support to South Vietnam 1963 The Assassination of Ngo Dinh Diem 1964 The Gulf of Tonkin Incident and Gulf of Tonkin Resolution 1964 President Johnson increases aid to South Vietnam 1968 Paris Peace Talks 1968 The Tet Offensive 1975 The Fall of South Vietnam