Most the German Soldiers (extra's) in the movie are United States Air Force Enlisted men on Permissive TDY, I was overseas at the time when the memo came through asking for volunteers to help make the movie. I remember the US Army Enlisteds being upset they were not allowed to go on TDY.
I wasn't referring to the extras, I was referring to the actors. BTW, I was in the Army in Germany shortly before the film was made, and I understand. We had work to do.