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 Ashdown poured into the country, sweeping aside all resistance and taking control of the various Anglo-Saxon kingdoms. In 871, only the Anglo-Saxon kingdom of Wessex still offered resistance. It was ruled by King Ethelred of Wessex, but two of his brothers had already been king and died. Now, only he and his younger brother Alfred were left. The Danes, full of confidence after success at Reading, marched west to attack the Saxons who had retreated up onto the Berkshire Downs to reassemble their armies. Alfred had to act quickly to avoid defeat. The King’s troops had to be quickly mustered from