1968 Event Famous photo: Saigon police chief Nguyen Ngoc Loan executes a Viet Cong officer with a pistol shot to head 1968 Event Viet Cong's Tet offensive begins 1967 Event 25,000 U.S. and South Vietnamese troops launched Operation Junction City, offensive to smash Viet Cong stronghold near Cambodian border 1965 Event Viet Cong offensive against U.S. base Da Nang, begins 1962 Event U.S. begins spraying foliage in Vietnam to reveal Viet Cong guerrillas 1660 Death St. Vincent de Paul, Vincentian Cong founder, dies
