From the 14th century onwards, the successive conflicts of the Hundred Years’ War between France and England forced the construction of new fortifications on the eastern side of Mont-Saint-Michel. The fortress, defended by a few knights and men-at-arms loyal to the King of France, was thus reinforced by a stone wall flanked by several defensive towers. On several occasions and for almost 30 years, the Mont managed to resist the assaults of the English army.