 Following their victory, the Neustrians joined with Radbod, King of the Frisians and invaded Austrasia, aiming towards the Meuse river to take the heartland of the factions support.It is at this moment that Charles Martel is first mentioned in all historical records, when notes him surviving being imprisoned by his step-mother Plectrude.Charles managed to escape and mustered an Austrasian army to face the encroaching Radbod and the Neustrians.