In the eighth century a Frankish commander halted a Muslim army that had advanced from Spain, at the battle usually called Tours or Poitiers. Who led the Frankish force?

Explication

The commander named here led the Frankish forces at that eighth-century battle, and the standing he won by it is a large part of why his family rose to hold the Frankish crown itself. Charlemagne is the classic confusion, but he was born more than a decade after the fighting and took no part in it whatever.