Battle of Bryn Derwin 1255
Recorded location from Wikidata; battle sites are often approximate.
About the battle
The Battle of Bryn Derwin was fought at Bwlch-derwin in Eifionydd, Gwynedd on June 1255, between Llywelyn ap Gruffudd and his brothers, Dafydd ap Gruffudd and Owain Goch ap Gruffydd.
Llywelyn had ruled over a truncated Kingdom of Gwynedd jointly with Owain since the death of the previous Prince of Wales, Dafydd ap Llywelyn, in 1246, having agreed in the Treaty of Woodstock to split Gwynedd west of the Conwy, but relations between the two men apparently deteriorated in the early 1250s.
The battle lasted for no more than an hour, and resulted in a victory for Llywelyn; Dafydd and Owain were both imprisoned. Dafydd was soon released and went on to play a central role in the royal government of Gwynedd until his defection and subsequent removal to England in the mid-1260s. Llywelyn reluctantly released Owain in 1277 under the terms of the Treaty of Aberconwy, after some 20 years of captivity.
Text adapted from the Wikipedia article Battle of Bryn Derwin (revision 1370108214), licensed under CC BY-SA 4.0. Changes: excerpted from the article lead section; shortened by selecting paragraphs and trimming at a sentence boundary; formatting and citations removed. No text added.
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