Jarhead(2005)

Set during the Gulf War, the episodic tale follows Anthony Swofford (a.k.a. "Swoff"), a third-generation enlistee, from his sobering stint in boot camp to active duty, where he's sporting a sniper's rifle and a hundred-pound ruck sack on his back, while moving through Middle East deserts with no cover from the intolerable heat. As well, he advances with no protection from the Iraqi soldiers--and there's always a potential enemy sighting, just over the next horizon. Swoff and his fellow Marines sustain themselves on humor and camaraderie as they tread the blazing desert fields in a country they don't understand, against an enemy they can't see, for a cause they don't fully fathom.