Page "Gruffudd ap Cynan" Paragraph 10

Gruffudd fled to Ireland but in 1081 returned and made an alliance with Rhys ap Tewdwr prince of Deheubarth.

Rhys had been attacked by Caradog ap Gruffudd of Gwent and Morgannwg, and had been forced to flee to the St David's Cathedral.

Gruffudd this time embarked from Waterford with a force composed of Danes and Irish and landed near St David's, presumably by prior arrangement with Rhys.

He was joined here by a force of his supporters from Gwynedd, and he and Rhys marched north to seek Trahaearn ap Caradog and Caradog ap Gruffudd who had themselves made an alliance and been joined by Meilyr ap Rhiwallon of Powys.

The armies of the two confederacies met at the Battle of Mynydd Carn, with Gruffudd and Rhys victorious and Trahaearn, Caradog and Meilyr all being killed.

Gruffudd was thus able to seize power in Gwynedd for the second time.