Battle of Arfderydd
The Battle of Arfderydd (also known as Arderydd) was fought in medieval Britain in AD 573, according to the Annales Cambriae. The opposing armies are identified in a number of Old Welsh sources but vary between them, perhaps suggesting several allied armies were involved. The main adversaries appear to have been Gwenddoleu ap Ceidio and either the princely brothers Peredur and Gwrgi or King Rhydderch Hael of Strathclyde. Gwenddoleu was defeated and killed in the battle. His bard, Myrddin Wyllt, reportedly went mad and ran into the forest.