With the French cruising offshore, he besieged the army of General Cornwallis at Yorktown, just to the east of Williamsburg. In large part because of effective French aid, both at sea and on land, this campaign culminated five weeks later with the surrender of Cornwallis’ force. The British army continued to hold New York City, but the war effectively was over. It would take another twenty-two months to arrive at a signed peace treaty, and many months more for both sides to ratify it.