We have a document with 3429th ORD MAM letterhead, stating to the commanding officer of Company C, 423d Infantry, that he was deserving a Bronze Star for campaign Rhineland. It was dated in June of 1945. The report of separation states he was ETO in March of '44 and arrived back in Nov. '45. He was an auto mechanic in real life and that was his job in the army, so it would make sense he was part of an ORD MAM.
He never talked much about the war, but did mention that he was not in D Day, but was part of the Battle of the Bulge, which was a rather large operation.
I have requested his OMPF and any other records from NARA, but I am not hopeful of finding much or anything anytime soon.