Hail, Hero! (1969)

"The generation gap is more than just long hair, loud music, or a misunderstanding of ideals between father and son. It is a void from which a new force must emerge, a new hero!"

Carl Dixon decides to quit school and enlist in the Army, even though he's already run afoul of the law as a Vietnam protestor. It is our hero's intention to use love, rather than bullets, to combat the Viet Cong. Needless to say, his idealism is no match for the harsher realities of war.