When Perry arrives in Vietnam, he’s certain that he and everyone else fights for a good and noble cause. This certainty gives him strength, while each event that makes him question it increases his trauma. Each soldier gives his version of the war’s just and noble cause, and although their range suggests a concerning lack of clarity on the war’s aims—ensuring freedom for the Vietnamese people, defeating communism, and protecting American interests overlap but are distinct rationales—they all provide a positive reason for each man to risk his life.