As an ex Military Policeman, with a lot of experience in traffic control, I found Ty Hardins portrayal of an MP quite ludicrous. Then again being more of a fictionlised account of the battle it should not have surprised me.
Redcap
Yes Redcap but, don't forget, Hardins character was really a German soldier posing as an American and the MP part was a total ruse as to confuse the Americans and cause alot of chaos behind the lines. And in the real Battle of the Bulge, the Germans did have many of their own English speaking soldiers dress up in GI clothes and go behind the lines to disrupt everything they could.