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 the Catalaunian Plains 10, 100, 1000, and 10,000, but no real estimates of Hunnic military capacity can be determined. Their barbarian allies, however, do receive mentions at other times in other sources: in 430 A.D. The Hunnish king Octar was defeated by a force of 3000 Neckar Burgundians who would later come under Hun subjugation, and Heather estimates that both the Gepids and the Amali Goths could have each fielded a maximum of 15,000 men at the Battle of Nedao in 454. Therefore, the total Hunnic forces could have plausibly been in excess of 48,000 men. This is somewhat supported by the Chronicon