Veterans day By john.thorne Jul 15, 1960 Communists form National Liberation Front in South. Nov 1, 1963 Ngo Dinh Diem, South Vietnam's premier, slain in coup Jul 31, 1966 B-52s bomb DMZ, reportedly used by North Vietnam for entry into South Oct 21, 1967 South Vietnam National Assembly approves election of Nguyen Van Thieu as president Apr 1, 1972 Nixon responds to North Vietnamese drive across DMZ by ordering mining of North Vietnam ports and heavy bombing of Hanoi-Haiphong area Dec 24, 2013 Nixon orders “Christmas bombing” of North to get North Vietnamese back to conference table (Dec.)