Battle of Edington Forces Viking Retreat from Wessex
On May 21, 878, according to the Anglo-Saxon Chronicle, King Alfred the Great’s forces defeated the Great Heathen Army led by Guthrum at the Battle of Edington in southwestern England. The victory pushed Viking forces back and paved the way for the Treaty of Wedmore, under which Guthrum was baptized and withdrew to East Anglia. This deal stabilized Alfred’s kingdom and helped secure the survival of an independent English realm, which later chroniclers saw as a foundation for a unified England.