G. I. Jerk
A soldier who starts trouble then runs like a coward when it gets real. He's got a badge but no brains and thinks he's a hero.
He started a food fight with the mess hall and ran out when the chef chased him with a ladle.
He yelled at a tank and then hid behind a bush when it fired.
He claimed he could beat a whole platoon, then cried when he got hit by a bullet.