Great Heathen Army Anglia and spent the winter of 869–70 at Thetford. There was no peace agreement between the East Anglians and the Vikings this time. When the local king Edmund fought against the invaders, he was captured and killed. In 871, the Great Summer Army arrived from Scandinavia, led by Bagsecg. The reinforced Viking army turned its attention to Wessex, but the West Saxons, led by King Æthelred's brother Alfred, defeated them on 8 January 871 at the Battle of Ashdown, slaying Bagsecg in the process. Three months later, Æthelred died and was succeeded by Alfred (later known as Alfred the Great),
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