Pons married Cecile of France, the widow of his mentor Tancred, Prince of Galilee, and daughter of Philip I of France. This marriage helped to reconcile the Norman and Provençal Crusaders, who had fallen out during the Siege of Antioch. In 1118 he allied with Baldwin II, the new king of Jerusalem, and in 1119 the two marched north to aid Roger of Salerno against an invasion by Il-ghazi. Roger decided not to wait for them, and he and his army were slaughtered at the Battle of Ager Sanguinis; Baldwin II was later taken hostage.