Alfred's Castle farmhouse was built within the abandoned prehistoric enclosure. King Alfred won a great victory against the Danes at the Battle of Ashdown, in AD 871. Being located just to the west of Ashdown House, Victorian antiquaries associated Alfred's Castle with the King's troop movements before the battle. The exact site of Alfred's battle has not yet been determined, however, so is a matter for debate. The most likely sites are near Compton and Aldworth in Berkshire. Excavations were carried out at Alfred's Castle from 1998-2000 by archaeologists from Oxford University, and post-excavation analysis is still ongoing (as of August 2011).
Danes (Germanic tribe) fortified trade settlements, so called longphorts. During the Viking Age, they established many coastal towns including Dublin (Dyflin), Cork, Waterford (Veðrafjǫrðr) and Limerick (Hlymrekr) and Danish settlers followed. There were many small skirmishes and larger battles with the native Irish clans in the following two centuries, with the Danes sometimes siding with allied clans. In 1014 AD, at the Battle of Clontarf, the Vikings were eventually defeated and the remaining Danish settlers gradually assimilated with the Irish population. The first Vikings appeared in Frisia, now part of the Netherlands and Germany, in 800 AD, when Danes plundered coastal settlements and