Louis III of France ( born 863 â `` 865 , died 5 August 882 ) , king of Western Francia , was the second son of King Louis the Stammerer and Ansgarde . Louis III ( 863x65 â `` 5 August 882 ) was the King of France , still then called West Francia , from 879 until his death . The second son of Louis the Stammerer and his first wife , Ansgarde , he succeeded his father to reign jointly with his younger brother Carloman II , who became sole ruler on Louis 's death .