Why was it a mistake for general cornwallis to move his troops to yorktown?

RIGHT, It was on a peninsula and easily surrounded by enemy ships.

Explanation:

American troops in command of Lafayette staged raids Cornwallis and held him in the South.

Cornwallis made a blunder mistake. He should send the part of his Army to the North but he brought them to the Yorktown peninsula.

George Washington saw this moment as a great opportunity to ambush Cornwallis on the peninsula.

Also, the French fleet under Admiral de Grasse headed over to cut off Cornwallis.

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