Battle of Vincy between Charles Martel and Ragenfrid.

The Battle of Vincy was a battle of the Frankish civil war of 715–18 fought near Cambrai, in the modern département of Nord. It was a contest between Charles Martel and the Austrasians on one side and the king of the Franks, Chilperic II, and his mayor of the palace, Ragenfrid, on the other.

Charles Martel, Martel being a sobriquet in Old French for "The Hammer", was a Frankish political and military leader who, as Duke and Prince of the Franks and Mayor of the Palace, was the de facto ruler of the Franks from 718 until his death. He was a son of the Frankish statesman Pepin of Herstal and a noblewoman named Alpaida. Charles successfully asserted his claims to power as successor to his father as the power behind the throne in Frankish politics. Continuing and building on his father's work, he restored centralized government in Francia and began the series of military campaigns that re-established the Franks as the undisputed masters of all Gaul. According to a near-contemporary source, the Liber Historiae Francorum, Charles was "a warrior who was uncommonly ... effective in battle".

Ragenfrid was the mayor of the palace of Neustria and Burgundy from 715, when he filled the vacuum in Neustria caused by the death of Pepin of Heristal, until 718, when Charles Martel finally established himself over the whole Frankish kingdom.