The Siege of Yorktown took place from September 28 to October 19, 1781, during the American Revolutionary War. It was a decisive battle where American and French forces, led by General George Washington and General Rochambeau, surrounded the British army commanded by General Cornwallis. The siege effectively cut off British supplies and reinforcements. After weeks of bombardment and dwindling resources, Cornwallis surrendered on October 19, marking a significant victory for the American forces. This defeat led to the eventual negotiation of peace and the recognition of American independence, shaping the future of the United States.