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Also I would recommend reading 'The things that they carried' or at least the "The Sweetheart of the Song Tra Bong" chapter.
Long story short this dude at a remote field medical outpost smuggles his high school sweetheart into vietnam. At first things are cool, he gives her a tour of the base and stuff, she learns how to cook food for the local vietnamese. Then she starts taking in interest in his job, whenever the choppers bring in causualties she helps pinch severed arteries among other things. Eventually the other guys start taking a liking to her, teaching her how to shoot and such, its at this point she stops wearing her dresses, and cuts her hair