TBH, it does copy "proper" war films in many ways. Over-optimistic recruits heading patrioticly into slaughter, demonisation of the enemy (though, it would be hard to humanise them...), friends dying heroic, but ultimately pointless deaths, as well as commenting on war in general, especially the propaganda of war.BenFace said:Starship Troopers.
Nobody said it had to be a real war...
Personally, my favourite war movie is full metal jacket. It's the only one I can think of which blames the training just as much as combat itself for the troops' mental states.
It also removes any sort of myths regarding soldiers in movies. A soldier is neither an unstoppable hero, or a broken shell. More often than not, especially considering the draft, he's just another man caught in the madness of a conflict he struggles to understand, just trying to survive.