Under Frankish inheritance traditions, all sons inherit part of the land, so four kingdoms emerged: centered on Paris, Orléans, Soissons, and Rheims. Over time, the borders and numbers of Frankish kingdoms were fluid and changed frequently. Also during this time, the Mayors of the Palace, originally the chief advisor to the kings, would become the real power in the Frankish lands; the Merovingian kings themselves would be reduced to little more than figureheads.A couple hundred years in the history of France, today's "History of" country. We are proceeding in alphabetical order through the world's 206 countries, reading their Wikipedia "History of" pages. France has one of the most interesting pages, and I couldn't begin to summarize the summary there.
By this time Muslim invaders had conquered Hispania and were threatening the Frankish kingdoms. Duke Odo the Great defeated a major invading force at Toulouse in 721 but failed to repel a raiding party in 732. The mayor of the palace, Charles Martel, defeated that raiding party at the Battle of Tours (although the battle took place between Tours and Poitiers) and earned respect and power within the Frankish Kingdom. The assumption of the crown in 751 by Pepin the Short (son of Charles Martel) established the Carolingian dynasty as the Kings of the Franks.
Here's the Battle of Tours, which happened in 732, as depicted by Charles de Steuben in 1837: