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Guilford Courthouse, North Carolina 
On 15 March 1781, the Americans inflicted heavy losses on the British, forcing General Cornwallis to retreat. He then changed his plans, and began his ill-fated invasion of Virginia, resulting in his defeat at Yorktown.

Charles Cornwallis 
The British surrendered at Yorktown on 19 October 1781. Although fighting continued for more than a year, the surrender effectively ended British hopes for a victory.

Answer:

1781

Explanation: