Athelstan completed the subjugation of Cornwall, fixing the River Tamar as the boundary between English and Cornish territory and expelling the Cornish from Exeter, which had had a mixed English-Cornish population. Earlier sources suggest Athelstan may have fought a battle in Cornwall. The Cornish kings were made to pay tribute and attend Athelstan court. This completed the western extension of English power that Alfred had begun.
West Saxon army under Athelstan
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