Battle of Lewes Forces England’s King to Share Power
On May 14, 1264, the Battle of Lewes pitted King Henry III of England against rebellious barons led by Simon de Montfort in Sussex. De Montfort’s forces defeated the royal army and captured both Henry and his son, the future Edward I. According to contemporary chronicles, the victory effectively placed England under baronial rule for a time. The resulting “Mise of Lewes” curbed royal authority and paved the way for the more representative parliaments de Montfort would summon the following year.