Delta Farce(2007)

Down on his luck after losing his job and his girlfriend on the same day, Larry decides to join his neighbor, Bill, and his combat-happy buddy, Everett, for a relaxing weekend of drinking and target practice. But when the three hapless guys are mistaken for Army Reservists by the hard-nosed Sergeant Kilgrove, they're loaded onto an army plane headed for Fallujah, Iraq--and mistakenly ejected in a Humvee somewhere over Mexico. Convinced they're actually in the Middle East, the clueless wannabe soldiers save a rural village from a siege of bandits and become local heroes. But when Carlos Santana, a ruthless, karaoke-loving warlord, strikes back, Larry, Bill and Everett have to lay down their beers and take up their arms--and prove they just might be real soldiers after all.