Robert I of France
Robert I (c. 860–923), younger son of Robert the Strong, ruled the county of Paris and the March of Neustria under his brother King Odo. He helped defend Paris against the Vikings in 885 and fought them for decades.
In 898 he recognised the Carolingian Charles the Simple as king. When Charles granted Chelles Abbey to his favourite in 922, Robert and the magnates revolted and crowned him king at Reims.
On 15 June 923 Robert's army defeated Charles at Soissons, though Robert himself fell in the fighting. The nobles then elected his son-in-law Rudolph of Burgundy king.