Thanks for the interesting etamology of "Joe de". I love that sort of thing.

That it was used in "Battle Ground" explains why I associated it with Korea. "Battle Ground" is the first war movie I can remember going to with my Dad, and it was just before Korea broke out. I was 7 at the time so I really did not understand what was going on except that it was somehow different than WWII, mostly because Dad did not have to go away. Dad went into the Army in 1942 just after I was born and was only someone Mom talked about in my earliest memories.