Æthelred of Wessex of Mercia, appealed to him for help against the Vikings. Æthelred and his brother, the future Alfred the Great, led a West Saxon army to Nottingham, but there was no decisive battle, and Burgred bought off the Vikings. In 874 the Vikings defeated Burgred and drove him into exile. In 870 the Vikings turned their attention to Wessex, and on 4 January 871 at the Battle of Reading, Æthelred suffered a heavy defeat. Although he was able to re-form his army in time to win a victory at the Battle of Ashdown, he suffered further defeats on 22 January at
Five Boroughs of the Danelaw around 2700 ft ("c." 650 hides). The following burhs were not part of the Five Boroughs, but were Danish settled towns with large armies and ruled in a similar manner. These Danes often acted in allegiance with those of the Five Boroughs and the Danish King of East Anglia. First recorded invading newly ceded Mercian territories with their allies in 913, the Northampton Danes were initially very successful. However, on their return they were defeated by local Mercian forces near Luton, losing many horses and weapons. In December 914, their strength was further depleted when a number of Northampton Danes