The Siege of Fort St. Jean (also called St. John, St. Johns, or St. John's) was conducted by American Brigadier General Richard Montgomery on the town and fort of Saint-Jean in the British province of Quebec during the American Revolutionary War. The siege lasted from September 17 to November 3, 1775. The fall of Fort St. Jean opened the way for the American army to march on Montreal, which fell without battle on November 13. General Carleton escaped from Montreal, and made his way to Quebec City to prepare its defences against an anticipated attack.