The Magna Carta could not stabilize the Crown's power in the long run, and open rebellion arose against Henry III between 1258 and 1265, in the Baron's War. Led by the king's brother-in-law Simon de Montfort, a coalition of barons tried to impose reforms on the king. The parties were successful in turns. Eventually the king and his son the future king Edward I defeated the barons and Simon's army was killed alongside himself.
|Middle English Period, Political, History|