 Áed's incessant warfare with the Norse and Norse-Gaels, while militarily successful, proved to unexpected consequences in the long term for the position of the northern Uí Néill.Power and influence in the 10th and 11th centuries rested increasingly with kings who, like Máel Sechnaill, could exploit the wealth of new trading towns and the forces of the Norse and the Norse-Gaels.Máel Sechnaill's son Flann Sinna would later be King of Mide, High King of All Ireland.