Defeat By Gwynedd
At this time the King of Gwynedd, between 1149 to 1150, Owain Gwynedd was exerting pressure on the borders of Powys, despite the fact that Madog was married to Susanna, Owain's sister. Madog made an alliance with Ranulf de Gernon, 4th Earl of Chester, but Owain defeated them at the Battle of Ewloe (Coleshill) in 1150 and took possession of Madog's lands in Iâl (English="Yale"]. In 1157 when King Henry II of England invaded Gwynedd he was supported by Madog, who was able to regain many of his Welsh lands. Even so he retained the lordships of Oswestry and Whittington. In 1159 Madog would seem to have been the Welsh prince who accompanied King Henry II in his campaign to Toulouse which ended in failure. Returning home to Wales Madog died about 9 February 1160 in Whittington Castle. He was buried soon afterwards in the church of St. Tysilio at Meifod, the mother church of Powys.
Read more about this topic: Madog Ap Maredudd