The Yoke's On Me.

The Stooges try to join the army but are labeled 4-F by the draft board due to Curly having water on the knee. After they decide to go on vacation until a job comes along, their father insists they aid the war effort instead by becoming farmers. In the interim, several Japanese-Americans escape a prison camp, and work their way onto the farm. Curly is the first to notice some suspicious activity (one of the escapees places a carved pumpkin on his head, spooking Curly).