Ajax the killer gorilla has escaped from the zoo. Donald's nephews dress up as a gorilla, but soon Donald encounters the real gorilla, and they chase each other until the radio broadcasts instructions for subduing Ajax.
Donald is stuck on KP at an air training base. Sergeant Pete gives him a huge pile of potatoes to peel first, then gives him some tests: close your eyes and touch fingers, pin the tail on the airplane. He finally gets sent aloft, only to discover it's a parachute jump. Eventually, both Donald and Pete end up falling with no chutes and a bomb.
Donald Fauntleroy Duck gets his draft notice and goes in, past all the amazingly enticing recruiting posters, to sign up. First he has to pass the physical. Despite his flat feet, he makes it. Donald wants to fly, but first he has to make it through Sergeant Pete's boot camp. He has a terrible time with close-order drills, and standing at attention without moving when he's over an ant-hill proves a real challenge. Eventually, Donald ends up on endless KP.