The man and woman each grow up in, a suburban? metropolis? and they are very close, and hold each other very dear.
Soon, the Vietnam War arrives, and the boy seems to love the war, although, for reasons he does not even know--friends, family, TV, Nixon, "the silent majority."
The girl, comes to become an activist in hating the war, everything about it, every single aspect, down to the GI grunts that are sent down to "massacre" the vietnamese.
He disregards the girl, and decides to, willingly, and early, sign up for the war. Then, it's made apparent that she does not support this decision, she probably seems torn that he took this road that she advised to not take.
Soon, the boy--willingly, and early--joins the war. The news breaks the girl, as she had advised him to not take such a road down to hell.
He trains, begins to have reciprocal sentiments to this harsh training, and abuse of young men. Although, he just braves it through, just like the rest. Then, he makes the journey to Vietnam (by Mai Lai)
In Vietnam, he witnesses uncovered brutality, and unforeseen massacre. MAI LAI MASSACRE, he partakes in, but just watches all around him burn--his thoughts, his ideas, his sanity.
He goes AWOL to escape and return to his beloved girlfriend. Maybe she is already married? maybe she is not a hippie anymore? maybe she is still a hippie?
The story has to end happily. The girl is in peace--somewhat.