Barons War

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Barons' War (1263–67) In English history, conflict between Henry III and his barons, led by Simon de Montfort. In 1261 Henry renounced the Provisions of Oxford (1258) and Westminster (1259) that had proposed he rule through a council of barons rather than rely on favourites. The barons decided to force the king to submit and defeated Henry's army in the battle of Lewes (1264). Henry's son, the future Edward I, formed an army which defeated the barons, and Montfort was killed at the battle of Evesham (1265).