Erispoe met Charles in Angers (possibly in secret) in the days following the battle and concluded a peace treaty in return for being invested with the counties of Rennes and Nantes. South of the Loire, the "Pays de Retz" was detached from the County of Poitou and granted to him as well. Charles and Erispoe also created a baptismal alliance, whereby Charles stood as godfather at the baptism of Erispoe's infant son Conan, but whether in 851 or 856 is unknown. Finally, in 851 Charles gave Erispoe royal regalia (robes at least) and Erispoe in turn pledged himself to Charles with the giving of hands and an oath of fidelity. Erispoe subsequently overate at the banquet given in his honour.