The Three Stooges "Back From The Front" (1943)

The Stooges are merchant sailors whose ship is sunk by a Nazi sub. They sneak on board a Nazi freighter, and disguise themselves as German sailors. Before long their presence is discovered, and forced to devise a way to subdue the crew and take control of the vessel. They disguise themselves as Hitler, Goering and Gobbels to fool the ship's officers.