A Welsh army was raised by the lord of
Brycheiniog (
Brecknockshire),
Hywel ap Maredudd, containing men from Brycheiniog as well as men from Northern
Gŵyr that despised the Norman rule in Southern Gŵyr. The Normans sallied out expecting to meet a small collection of Welsh raiding bands, however the scale of the Welsh army took them by surprise. The two armies met on the common of Carn Coch. In a violent melee, the Welsh army emerged victorious, the Normans having lost around 500 men. == Aftermath ==