On the level fields outside the small colonial village of Yorktown occurred one of the great decisive battles of world history and one of the most momentous events in American history. Here, on October 19, 1781, after a prolonged siege, Lord Cornwallis surrendered his British Army to an allied French and American Army force under George Washington, virtually ending the American Revolution and assuring American independence. While hostilities did not formally end until 2 years later—on September 3, 1783, when the treaty was signed—in reality the dramatic victory at Yorktown had ended forever the subservience of the American colonies to England. Because of this victory the United States became truly a free and independent nation.