Chilperic II
In 716, Ragenfrid and Dagobert's successor, Chilperic II, fought deep into the heartland of Arnulfing power: the Maas and Ardennes. They allied with Dagobert's old enemy, Duke Radbod of Frisia, and defeated their rival Charles near Cologne, in which he had been besieging Plectrude and Theudoald. Ragenfrid went and Chilperic forced Plectrude to surrender most of the Austrasian treasury, her grandson's claim to the mayoralty, and acknowledge Chilperic as king.