The Great Army of the Danes invades Wessex, and, after two sieges, Alfred forces King Guthrum to agree to withdraw. When the leader of the Great Army breaks his word and invades Wessex in early winter, he nearly succeeds in capturing Alfred and destroying the last independent Saxon kingdom in Britain. King Alfred hides in the forest, until he finds a base deep in the fastness of a marsh. From there he starts to strike back. He deals with the traitors...