In 863, Charles negotiated the Treaty of Entrammes with Salomon, King of Brittany whereby western Anjou was recognised as a part of Brittany and the lay abbacy of Saint-Aubin in Angers was granted to Salomon, who commended himself to Charles and paid tribute.
He is a member of Pommeraie family, from Britanny and serves Laval Family, and possessed land of Verger Castle of Montigné and d'Entrammes (Mayenne).