Battle of the Conwy In 877 they partitioned Mercia, taking the east for themselves and leaving the west to Ceolwulf. Gwynedd was also under attack from the Vikings, and in 877 King Rhodri Mawr was defeated and driven out. He returned the following year, but immediately came under attack from Mercia, which was still trying to maintain its hegemony in Wales. King Alfred's victory over the Vikings at the Battle of Edington in May 878 relieved the pressure on Mercia, and in the same year Mercia defeated and killed Rhodri Mawr. Ceolwulf died or was deposed in 879, and he was succeeded as Lord
Battle of Ashdown to charge. However, his brother Ethelred had decided that he must pray before the battle and refused to advance until his prayer service was complete. Seeing that the Danish movement would cost him the advantage of high ground, Alfred decided to attack without help from his brother. The Anglo-Saxons' charged on the Danes on their side of the ridgeway. Although nothing specific is known about the fighting, it is likely that both sides employed shieldwalls from which to push and batter against each other. Eventually the Danes broke and fled across the downs. Only later did Ethelred launch his own