In 577 Ceawlin, with his son Cuthwine, led the Gewisse against the Britons at 'Deorham' (Dyrham in Gloucestershire). They reportedly killed three kings, Coinmail, Condidan, and Farinmail. Ceawlin and Cuthwine captured Gloucester, Cirencester and Bath. West Saxons then colonized the lower Severn valley. The importance of this victory was that it gave the West Saxons access to the western sea. This also divided the Britons so they could no longer communicate by land. But it was territory later Wessex kings would not be able to hold. In 584 Ceawlin defeated the Britons at Fethanlea (Oxfordshire) but his ally Cutha was killed there.