I am currently helping a friend learn more about his grandfather. His father knows almost nothing of his military career as well.
What we know so far is that he was in the Army during World War II. A newspaper marriage announcement said that he served in France, Belgium and Czechoslovakia. He was discharged at Camp McCoy, Sparta, WI in October 1947. He also received a Purple Heart and 5 campaign stars.
My friend's dad had written to the NARA in St. Louis. I didn't see the information he got back, but supposedly, it did not list his unit or gave a service record either.