Henry de Montfort was a notable figure in the 13th century, known primarily for his role in the Barons' War against King Henry III of England. He was the son of Simon de Montfort, a prominent leader who sought to reform the English monarchy and increase the power of the barons. Henry supported his father's efforts and became involved in the political struggles of the time. After his father's death at the Battle of Evesham in 1265, Henry continued to fight for the baronial cause. He played a significant role in the ongoing conflicts and was involved in various military campaigns. His contributions helped shape the political landscape of medieval England.