 Private Duck is a camouflage painter. He paints a giant cannon with some very gaudy colors, until Sergeant Pete explains that the point is to make it so the cannon can t be seen. Donald finds a bucket of experimental invisible paint and makes the cannon disappear. Pete isn t happy with this, and knocks Donald into the paint, then chases him, until he runs into the general. As Pete tries to explain, Donald prods him with a cactus, then goes off to steal some pies. Eventually, Pete goes berserk and starts throwing grenades willy-nilly and gets in more trouble with the general.