I was able to get this along with several other Donald Duck cartoons on tape. In the opening title, a man sings "The army's not the army anymore, it's better than it's ever been before." After his physical, Donald enters the army with Pete as his drill seargent. In the end, poor Donald ends up peeling potatoes in the mess hall. In this first army short of Donald, we also learn that his middle name is Fauntelroy by reading it on his draft card.
Review of Donald Gets Drafted
