The Viking Great Army's arrival in 865 was recounted in the Anglo-Saxon Chronicle:.. According to the Chronicle, the Vikings spent years campaigning through the territory of the four Anglo-Saxon kingdoms -- East Anglia, Mercia, Northumbria, and Wessex... By 880, all the kingdoms had fallen to the Vikings except Wessex, with which they made peace... Excavations conducted [at Repton, the capital of Mercia] between 1974 and 1993 by Martin Biddle and his late wife, Birthe Kjolbye-Biddle, had revealed a small, heavily defended enclosure covering just an acre or two... some experts took these findings to suggest that the Great Army was...