Louis III (863/65—5 August 882) was King of West Francia (a precursor to the Kingdom of France) from 879 until his death in 882. He succeeded his father and ruled over West Francia in tandem with his brother Carloman II. Louis controlled the northern part of West Francia (Neustria), including the capital of Paris, while Carloman controlled the southern portion (Aquitania). Louis ruled from March 880 to 5 August 882, when he died and left the rest of West Francia to his brother. His short reign was profoundly influenced by his military success, including his defeating Northern Vikings in August 881.