John, King of England Normandy and Anjou until 1259, but John's continental losses and the consequent growth of Capetian power in the 13th century proved to mark a "turning point in European history". John's first wife, Isabel, Countess of Gloucester, was released from imprisonment in 1214; she remarried twice, and died in 1217. John's second wife, Isabella of Angoulême, left England for Angoulême soon after the king's death; she became a powerful regional leader, but largely abandoned the children she had had by John. John had five legitimate children, all by Isabella. His eldest son, Henry III, ruled as King of England for the
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