Washington and the Patriots were able to defeat the British at Yorktown through a combination of careful strategy and cooperation with their allies. The key to their victory was the arrival of a French fleet in the Chesapeake Bay, which effectively cut off the British army from their naval support.
Washington and his army then laid siege to the British forces at Yorktown, using artillery to bombard their positions and prevent them from receiving supplies or reinforcement. The French also played a crucial role in the battle, providing much-needed manpower and artillery support.
The British army was eventually forced to surrender at Yorktown, marking the end of the Revolutionary War in the United States. This victory was a significant turning point in the war and proved that the Patriots were capable of defeating the powerful British army.
Overall, Washington and the Patriots were able to defeat the British at Yorktown through careful planning and cooperation with their allies. This victory was a crucial step in securing American independence and establishing the United States as a new nation.