“The Vietnam War was a Cold War-era proxy war that occurred in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. This war was fought between North Vietnam- supported by the Soviet Union, China and other communist allies- and the government of South Vietnam- supported by the United States, Philippines and other anti-communist allies. The U.S. government viewed its involvement in the war as a way to prevent a Communist takeover of South Vietnam. The United States ran an extensive program of psychological warfare during the Vietnam War. Psychological warfare is a term used to denote ‘any action which is practiced mainly by psychological methods with the aim of evoking a planned psychological reaction in other people,’ typically intended to reduce an opponent’s morale. A number of strategies and programs were used by the governments of South Vietnam and the United States during the Vietnam War to win the popular support of the Vietnamese people and to help defeat the Viet Cong insurgency. …”
South Vietnamese Propaganda | From McFarlin Tower
W – State of Vietnam referendum, 1955
Google – The Vietnam War: The Definitive Illustrated History

Vietnamese War Attacking Propaganda Poster