Atlas of Battles

battle, medieval

Battle of Bryn Derwin

Battle of Bryn Derwin was a battle fought on 1 June 1255 at Eifionydd, in what is now United Kingdom. The recorded result: Victory for Llywelyn ap Gruffudd.

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Fought1 June 1255
WhereEifionydd, United Kingdom52.990N, 4.290W
OutcomeVictory for Llywelyn ap Gruffudd
BelligerentsLlywelyn ap GruffuddagainstOwain Goch ap Gruffudd; Dafydd ap Gruffudd

Record

Date1 June 1255
PlaceEifionydd, United Kingdom
52.990N, 4.290W
KindBattle, medieval
Territorial changeLlywelyn ap Gruffudd takes possession of the entirety of Gwynedd Uwch Conwy
Battle of Bryn DerwinBattle of Bryn DerwinBattle of Bron yr ErwBattle of TuthillBattle of TuthillSiege of CaernarfonSiege of HarlechBattle of Bron yr ErwBattle of TuthillSiege of HarlechDublinBirminghamManchesterBlackpoolDundalkDroghedaDouglas100 km52.990N, 4.290W
The recorded site, with the nearest other engagements in the atlas. Present-day coastlines, rivers and borders; towns from Natural Earth.

Nearest engagements

Elsewhere in 1255

Battle of Bryn Derwin is one of 629 engagements of the 13th century in the atlas and one of 753 in present-day United Kingdom.

Sources

Identity, coordinates, dates and the war from Wikidata Q4870579, released under CC0. Result, belligerents, commanders, strength and casualties from the infobox of the English Wikipedia article Battle of Bryn Derwin, revision 1370108214, read 2026-11-14, licensed CC BY-SA 4.0; the article's text is not reproduced here. Present-day country and state from Natural Earth. Dates before 1582 follow the Julian calendar as recorded.