Complex sentence: Following U.S. Army service in World War II in the Battle of the Bulge where he became a Prisoner of War he obtained a degree at the University of Southern California under the G.I. Bill.
Split into simpler sentences: Following U.S. Army service in World War II in the Battle of the Bulge where he was taken prisoner of war (POW). He later obtained a degree at the University of Southern California under the G.I. Bill.