Complex sentence: Returning to France after Napoleon's fall, he was made chevalier of St. Louis in 1814; and in 1823, governor of Bordeaux, where, prematurely old through hard service and wound, he died.
Split into simpler sentences: Returning to France after Napoleon's fall, he was made chevalier of St. Louis in 1814. In 1823, governor of Bordeaux, where, prematurely old through hard service and wound, he died.