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
Isabella of Angoulême England, Isabella was now mostly regarded as a mere Countess of La Marche and had to give precedence to other women. In 1241, when Isabella and Hugh were summoned to the French court to swear fealty to King Louis IX of France's brother, Alphonse, who had been invested as Count of Poitou, their mother, the Queen Dowager Blanche openly snubbed her. This so infuriated Isabella, who had a deep-seated hatred of Blanche for having fervently supported the French invasion of England during the First Barons' War in May 1216, that she began to actively conspire against King Louis. Isabella and