I was an infantryman in the field in Vietnam. There are only 2 Vietnam movies that are even close to real - this one and Apocalypse Now, and they are both as close as a movie can get.
Hamburger Hill gets it right in many ways, the banter among the grunts, the fatalism mixed with the desire to survive a vicious war, the emotional stress of seeing your fellow GI's become casualties. The GI jargon used in the writing is the most authentic in any movie about that war. But most of all it depicts the incredible, to me mystical, bravery which drives any man into terrible battle in any war, on any side. This movie is an unpretentious marvel.
As for Apocalypse Now, it gets it right in a very different way. Everything in that movie actually happened in Vietnam, crazy as each scene may be to one who wasn't there. Take it scene by scene. Believe everything you see. (Except, of course, the whole Col. Kurtz - private army - assassination theme, which was out of the book about war in South Africa. It made a great hook for this movie, but no U. S. Army senior officer ever went off the deep end like that.)
