The Boys in Company C (1978)

To keep their sanity in an insane war, they had to be crazy.

Disheartened by futile combat, appalled by the corruption of their South Vietnamese ally, and constantly endangered by the incompetence of their own company commander, the young men find a possible way out of the war. They are told that if they purposely lose a soccer game against a South Vietnamese team, they can spend the rest of their tour playing exhibition games behind the lines.