"Platoon", directed by Oliver Stone

Chris Taylor (Charlie Sheen) is a young, naive American who gives up college and volunteers for combat in Vietnam. Upon arrival, he quickly discovers that his presence is quite nonessential, and is considered insignificant to the other soldiers, as he has not fought for as long as the rest of them and felt the effects of combat. Chris has two commanding officers, the ill-tempered and indestructible Staff Sergeant Robert Barnes (Tom Berenger) and the more pleasant and cooperative Sergeant Elias Grodin (Willem Dafoe). A line is drawn between the two officers and a number of men in the platoon when an illegal killing occurs during a village raid. As the war continues, Chris himself draws towards psychological meltdown. And as he struggles for survival, he soon realizes he is fighting two battles, the conflict with the enemy and the conflict between the men within his platoon. Written by Jeremy Thomson
Source: imdb.com

My Touch! War movies are definitely not my cup of tea: "Fuck you man! No I Fuck You you fucker.. Shoot HIM YOU FUCKER"... well... it's not my cup of tea. But, I know Platoon is a MUST in term of cinema history so... I did my duty... Veni Vidi Vici.... that's it.
No seriously it's very interesting movies coz you are just as fresh as Chris jumping out from the chopper and going to "do you share about your country"... and slowly... you turn you mind and change... and get scared of yourself.