Vale of White Horse being removed to show the white chalky soil beneath. This figure gives name to the hill, the range and the Vale. It is 114 m (374 ft) long and highly stylised, the neck, body and tail varying little in width. The origin of the figure is unknown. Tradition asserted it to be the monument of a victory over the Danes by King Alfred, who was born at Wantage, but the site of the Battle of Ashdown (871 CE), has been variously located. Moreover, the figure has been dated to the Bronze Age, so it pre-dates the battle by many centuries.
Halfdan Ragnarsson led by Bagsecg, bolstering the ranks of Halfdan's army. According to the "Anglo-Saxon Chronicle", the Danes battled the West Saxons nine times, including the Battle of Ashdown on 8 January 871. However, the West Saxons could not be defeated, and Halfdan accepted a truce from Alfred, newly crowned king of Wessex. The Army retreated to the captured town of London and stayed there over the winter of 871/872. Coins minted in London during this period bear the name Halfdan, identifying him as the leader of the army. In autumn of 872 the Army returned to Northumbria to quell a revolt