Welsh/ Saxon conflicts timeline part 3
Viking attacks on Wales increase dramaticly around this time, you will find a timeline of viking attacks in this link Timeline of Viking Raids on the Welsh 822 Coelwulf of Mercia invaded north Wales and captures Deganwy from Gwynedd and occupies the whole of Powys. Ceolwulf of Mercia conquers Powys Annales Cambriae "The fortress of Deganwy was destroyed by the Saxons and they took into their power the regio of Powys". 828 The lands of Powys are liberated from Mercian occupation by Cyngen ap Cadell . The Pillar of Eliseg was probably commissioned at this time. 830 Egbert of Wessex invades Powys and forces Cyngen ap Cadell to submit. Egbert then withdraws his forces. 831 A.D. 831 The Saxons of Mercia came unawares by night, and burnt the monastery of Senghenydd, which stood in the place the castle now does. From thence they went to the Castle of Treoda, and burnt it, and escaped from thence over the Severn Sea ...