Fortifications in Wessex c. 800 1066

The defence of the 9th-century kingdom of Wessex under King Alfred against the ''Great Viking Army'' is one of the major military achievements of Early Medieval history.

While the guerrilla warfare in the Somerset marshes and the battle of Edington are characteristic of Alfred''s military abilities, his definitive physical achievement was a series of some 30 well-structured fortifications (known as...