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 Reading (871) force marched on Reading. The assault was directed mainly at a gateway through the ramparts, and fierce and bloody fighting followed, before the attack was repulsed. Among the many dead of both sides was Æthelwulf. The Saxon forces were forced to retreat, allowing the Danes to continue their advance into Wessex. Following the Battle of Reading, Æthelred and Alfred reformed their army, and a few days later won a famous victory at the Battle of Ashdown, forcing the Danes to retreat to Reading once more. Two weeks later the Danes won the Battle of Basing, and then, on 22 March,