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 France, Dauphine of Viennois of Burgundy. In 1316, her father became the King of France. The same year, her marriage with Guigues VIII of Viennois was contracted. In 1322, however, her young father died, which devastated the family. Although Isabella was still in grief, she was married in 1323, when she was just 11 years old. Guigues was killed while besieging the Savoyard castle of Perrière in 1333. He left the Dauphiné to his brother Humbert II. He was buried in Saint-André in Grenoble. In 1335, Isabella married John III, Lord of Faucogney. She was widowed a second a time as John died in