After the British surrender, Washington sent Tench Tilghman to report the victory to Congress. After a difficult journey, he arrived in Philadelphia, which celebrated for several days. The British Prime Minister, Lord North, is reported to have exclaimed "Oh God, it's all over" when told of the defeat. Washington moved his army to New Windsor, New York where they remained stationed until the Treaty of Paris was signed on September 3, 1783, formally ending the war. Although the peace treaty did not happen for two years following the end of the battle, the Yorktown Campaign proved to be decisive; there was no significant battle or campaign after the Battle of Yorktown and in March 1782, "the British Parliament had agreed to cease hostilities."