The Battle of Aclea occurred in 851 between the West Saxons and Danish Vikings, possibly near Oakley, Bedfordshire or Water Oakley, Berkshire. The West Saxons, led by Æthelwulf, King of Wessex were already responding to another wave of Viking incursions. Little is known about the battle and the most important source of information comes from the Anglo-Saxon Chronicle which recorded that: The Battle of Aclea was a rare victory for Wessex, but stopped any major assault for another 15 years.