The Battle of Soissons of 718 is the last of the great pitched battles of the civil war between the heirs of Pepin of Heristal.

Since Pepin's death in December 714, his grandson and heir Theudoald, his widow Plectrude, his bastard son Charles Martel, his successor as mayor of the palace in Neustria Ragenfrid, and the new king Chilperic II had been waging a war for ascendancy.

Though Ragenfrid and Chilperic had begun with successes and Plectrude and Theudoald were removed early, Martel turns the tide of war and eventually forces the surrender of all his opponents.