The Battle of Deorham (or Dyrham) was a decisive military encounter between the West Saxons and the Britons of the West Country in 577. The battle, which was a major victory for the Wessex forces led by Ceawlin and his son, Cuthwine, resulted in the capture of the Brythonic cities of Glevum (Gloucester), Corinium Dobunnorum (Cirencester) and Aquae Sulis (Bath). It also led to the permanent cultural and ethnic separation of Dumnonia (Devon and Cornwall) from Wales.