In the year 793, Vikings raided the monastic community at
Lindisfarne, in the Northumbrian kingdom of Bernicia. It was the ominous beginning to a series of assaults on England; the following year, Vikings pillaged the monastery at Jarrow. It is unlikely that the Vikings were making deliberate attacks on Anglo-Saxon scholarship by targeting these places of learning; monasteries were known to be full of valuable objects, and monks were probably not expected to be formidable opponents. The raiders were interested in loot and, later, in land; over the next hundred years, the once-powerful Anglo-Saxon kingdoms of Northumbria, East Anglia, and Mercia crumbled before increasingly extensive Viking incursions. The Scandinavian takeover of England was not significantly halted until the West Saxon
king Alfred, driven into a hideout in the marshes of Somerset, somehow managed to organise the remnants of the local Anglo-Saxon militia and to defeat the Danish forces at the battle of Edington in 878.