Rent Ernest in the Army (1997)

This movie finds Ernest as a ball retriever at a driving range with aspirations of driving army trucks like real army people. His buddy assures him that if he joins the reserves, he can party every weekend while driving the big green trucks. So Ernest joins up. But coincidentally, his unit suddenly gets called up to the Persian Gulf as peace keepers monitoring a border dispute. The border dispute goes rapidly out of control, and Ernest winds up on the front lines. The fate of the civilized world is in his hands!