A 6th-century battle in sub-Roman Britain notable for its connection to the Myrddin Wyllt legend, one proposed origin of the Arthurian figure Merlin.
Key Facts
- Date (per Annales Cambriae)
- AD 573
- Location identified as
- Arthuret, near Longtown, Cumbria
- Welsh Triads classification
- One of the Three Futile Battles of Britain
- Defeated leader
- Gwenddoleu ap Ceidio (killed in battle)
- Associated legend
- Myrddin Wyllt, proposed origin of Merlin
Location
Cause → Event → Consequence
Tensions among sub-Roman British kingdoms in the late 6th century led to armed conflict between Gwenddoleu ap Ceidio and opposing forces, identified in Old Welsh sources as either the brothers Peredur and Gwrgi or King Rhydderch Hael of Strathclyde. The varying accounts across sources suggest multiple allied armies may have been involved on the opposing side.
The Battle of Arfderydd was fought in AD 573 on the plain between Liddel and Carwannok, near modern Arthuret in Cumbria. Gwenddoleu ap Ceidio was defeated and killed. The Welsh Triads record it among the Three Futile Battles of the Island of Britain, alongside the Battle of Camlann and the Battle of the Trees.
Following the defeat and death of Gwenddoleu, his bard Myrddin Wyllt reportedly lost his sanity and fled into the forest. This figure became one of several proposed origins for the Arthurian wizard Merlin, ensuring the battle's lasting presence in Welsh legendary tradition and medieval literary history.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Gwenddoleu ap Ceidio.
Side B
1 belligerent
Peredur, Gwrgi, Rhydderch Hael.