The Battle of Mechain was fought in Powys, Wales, in 1070, for rule of the Welsh kingdoms of Gwynedd and Powys. The battlefield may be near Llanfechain in northern Powys. A written account is included in the Brut y Tywysogion, the medieval Welsh chronicle of the princes. It is also referred to in the work of medieval poets such as Lewys Glyn Cothi.
After the murder of Gruffydd ap Llywelyn, Harold Godwinson married his widow Ealdgyth and divided Gruffydd's realm into the traditional kingdoms of Gwynedd and Powys, the rule of which were given to Bleddyn ap Cynfyn and his brother Rhiwallon ap Cynfyn. Gruffydd left two sons— Maredudd and Idwal–who in 1070 challenged Bleddyn and Rhiwallon at Mechain in an attempt to win back part of their father's kingdom. However, both sons were defeated, Idwal (or Ithel) being killed in combat and Maredudd dying of exposure after the battle.
Rhiwallon was also killed in this battle, leaving Bleddyn to rule Gwynedd and Powys alone.
"Battle of Mechain". www.llanfechain.org.uk. Archived from the original on 7 October 2011. Retrieved 22 December 2009.
The site of Battle of Mechain lies on Caradoc Rocks (Undifferentiated), bedrock that formed in the Caradocian. The rock here is mudstone, siltstone and sandstone.
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