The Americans, under General Richard Montgomery, had meanwhile led a strong force against Saint-Jean, and began to besiege the fortress in September. The garrison, commanded by Major Charles Preston of the 26th, was made up of 550 men from the 7th and 26th. However, supplies of food and ammunition were limited, and the defenders were forced to surrender in early November. The American force moved towards Montreal, which was evacuated, with the garrison – containing a small remnant of the 26th – sailing down the St. Lawrence towards Quebec City. Slowed by adverse winds and fog, and with their passage challenged by an American artillery battery and gunboat, the ships surrendered and the troops were taken prisoner; the regimental colours were wrapped around a cannon ball and dropped in the river so they would not be captured.