Great Heathen Army Anglia and spent the winter of 869–70 at Thetford. There was no peace agreement between the East Anglians and the Vikings this time. When the local king Edmund fought against the invaders, he was captured and killed. In 871, the Great Summer Army arrived from Scandinavia, led by Bagsecg. The reinforced Viking army turned its attention to Wessex, but the West Saxons, led by King Æthelred's brother Alfred, defeated them on 8 January 871 at the Battle of Ashdown, slaying Bagsecg in the process. Three months later, Æthelred died and was succeeded by Alfred (later known as Alfred the Great),
Battle of Tettenhall according to the "Anglo-Saxon Chronicle" defeated them and inflicted losses of many thousands including two or three kings. While little is known of the exact manoeuvres employed at the battle, it is obvious the allies trapped their Viking opponents and inflicted heavy casualties on them. The "Anglo-Saxon Chronicle" states that "many thousands of men" were killed, referring to the Danes. Seemingly unable to retreat, the Kings leading the Viking raid were both killed by the allied troops. With the Northern Danes subdued, the forces of Wessex and Mercia could be focused against those who had settled further south. It was