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U.S. Special Forces troops ("Green Berets") under the command of Colonel Mike Kirby defend a firebase during the Vietnam war. War correspondent George Beckwith accompanies Kirby and objects to both the war and the means by which it is executed. Kirby's firebase is overrun and his troops fight bravely to retake it. Kirby and a select group of his men are then ordered on a special mission to capture a high-level Viet Cong officer.