John, King of England treatment of many of England's most powerful nobles. Although both John and the barons agreed to the " peace treaty in 1215, neither side complied with its conditions. Civil war broke out shortly afterwards, with the barons aided by Louis of France. It soon descended into a stalemate. John died of dysentery contracted whilst on campaign in eastern England during late 1216; supporters of his son Henry III went on to achieve victory over Louis and the rebel barons the following year. Contemporary chroniclers were mostly critical of John's performance as king, and his reign has since been the subject
Æthelbald, King of Wessex at the Battle of Hingston Down, reducing Cornwall to the status of a client kingdom. He died in the following year and was succeeded by his son Æthelwulf, who appointed his eldest son Æthelstan as sub-king of Kent, Essex, Surrey and Sussex, in the same year. Æthelbald was the second son of King Æthelwulf and probably of his first wife Osburh, who was the mother of Alfred the Great. As Æthelstan was old enough to be appointed king ten years before Alfred was born in 849, and Æthelbald took part in battle in 851, some historians argue that it is