In 1758, the order was given to reinforce Fort Niagara and all men and loyal natives were called to defend it. The fort continued to operate until 1759, during the Seven Years' War. The fort's garrison was instructed to evacuate and burn Fort Rouillé should Fort Niagara be captured. Following the French defeat at Fort Niagara in July 1759, the garrison at Fort Rouillé burnt down the fort, and withdrew to Montreal. After the fall of Fort Niagara in July 1759, the British under Lieutenant Francis came to Rouillé and found only burnt timbers.