Sept - Oct 1781, The Battle of Yorktown, also known as the Siege of Yorktown. General George Washington's defeat of Lord Cornwallis's British army, causing the British to surrender and ending the American Revolutionary War. The British were being defeated by the American colonists, causing the British government to negotiate an end to the American Revolution, giving colonists their freedom.
The Siege of Yorktown, Oct 19, 1781, was a decisive victory by a combined assault of American forces led by Gen George Washington and French forces led by the Comte de Rochambeau over a British Army commanded by Lt General Lord Cornwallis. The culmination of the Yorktown campaign, it proved to be the last major land battle of the American Revolutionary War in North America, as the surrender of Cornwallis' army prompted the British government eventually to negotiate an end to the conflict.