Viking Age by a Viking leader called Bagsecg and his five earls. Aided by the Great Heathen Army (which had already overrun much of England from its base in Jorvik), Bagsecg's forces, and Halfdan's forces (through an alliance), the combined Viking forces raided much of England until 871, when they planned an invasion of Wessex. On 8 January 871, Bagsecg was killed at the Battle of Ashdown along with his earls. As a result, many of the Vikings returned to northern England, where Jorvic had become the centre of the Viking kingdom, but Alfred of Wessex managed to keep them out of
Battle of Basing Battle of Basing The Battle of Basing was a battle on 22 January 871 at Old Basing in what is now the English county of Hampshire. It was one of a series of battles that took place following an invasion of the then kingdom of Wessex by an army of Danes. Both battle and campaign are described in the "Anglo-Saxon Chronicle". The Danes had established a camp at Reading, and the previous battles of Englefield, Reading and Ashdown had proved indecisive, with victories to both sides. Two weeks after the Saxon victory at Ashdown, the armies met again at Basing.