John of Montfort was a notable figure in the 14th century, recognized for his role as a military leader and nobleman in the region of Brittany. He was born in 1331 and became the Duke of Brittany after a tumultuous period of conflict and power struggles in the area. His life was marked by his involvement in the Hundred Years' War, where he aligned with the English against the French. John of Montfort's legacy includes his efforts to secure Brittany's independence and his contributions to the region's political landscape during a time of significant upheaval.