John invades Gwynedd in 1211 with the…
August 1211 CE
John invades Gwynedd in 1211 with the aid of almost all the other Welsh princes, planning according to Brut y Tywysogion "to dispossess Llywelyn and destroy him utterly".
The first invasion is forced to retreat, but in August John invades again with a larger army, crosses the River Conwy and penetrates Snowdonia.
Bangor is burnt by a detachment of the royal army and the Bishop of Bangor captured.