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 and the Anglo-Saxons were forced to retreat while the Danes pursued. The Danish armies caught up with the Anglo-Saxons on the field of Ashdown, located somewhere near the border of Oxfordshire and Berkshire (the precise location is unknown). It was January 8, 871. The weather was cold and damp, and the Berkshire Downs were soaked and boggy. King Ethelred divided his army in two, positioning the halves on either side of a ridgeway. Ethelred commanded one side, Alfred the other. As the Danes approached, they also split their army. Alfred watched as the Danes drew nearer, waiting for the order