How
did the American patriots win the Battle of Yorktown?

The culmination of the Yorktown Campaign, the siege proved to be the last major land battle of the American Revolutionary War in the North American region, as the surrender by Cornwallis, and the capture of both him and his army, prompted the British government to negotiate an end to the conflict.

which sentences ? that question is incomplete

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )