The Americans won the Battle of Yorktown because the British were low on reinforcements and got the assistance of the French. The Battle of Yorktown was an important and historic battle because it was the last battle of the American Revolution. The British had won a series of victories against the Americans in past battles.
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No we haven’t because look at the world we’re living in right now. All these protest, racial discrimination.
They were getting new technology and China's advances through trade. The new information complemented their own discoveries and helped them in their development.