abstract:The Battle of Soissons of 718 was 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.