Battle of Beran Byrig
At the Battle of Beran Byrig or Beranburh the West Saxons are said to have defeated the Britons at Barbury Castle hillfort near Swindon in or around 556 AD according to the Anglo-Saxon Chronicle.
The Chronicle's entry for the year states:
The control of Barbury Castle and its surroundings is likely to have been strategically important for both sides, as it lies on the Ridgeway, a principal regional communication route.