Cliched wartime heroics co-directed by Wayne and based on Robin Moore's novel. The Duke stars as a Special Forces colonel, leading his troops against the Viet Cong. Painfully insipid pro-war propaganda, notable as the only American film to come out in support of U.S. involvement in Vietnam. Truly embarrassing but did spawn the hit single "Ballad of the Green Beret" by Barry Sadler.