What happened at the battle of Yorktown?
See the explanation.
In my history book, it says, "In April 1781, Cornwallis wrote that he was 'quite tired of marching about the country.' He moved his army to Yorktown, a sleepy tobacco port on Chesapeake Bay in Virginia, for a good rest.
By the time Cornwallis was settling into Yorktown, France had sent nearly 5,000 troops to join Washington's army in New York. In August, Washington learned that another 3,000 troops were scheduled to arrive soon in 29 French warships.
Washington used this information to set a trap for Cornwallis. Secretly, he moved his army south to Virginia. When they arrived, they joined the French and surrounded Yorktown on land with more than 16,000 troops.
Meanwhile, the French warships showed up just in time to seal off the entrance to Chesapeake Bay. Their appearance was a crucial help to the Americans. Now Cornwallis was cut off from the British navy and any hope of rescue by sea.
The trap was sprung on October 6, 1781. Joseph Martin watched as a flag was raised to signal American and French gunners to open fire on Yorktown. 'I confess I felt a secret pride swell in my heart,' he wrote, 'when I saw the 'star-spangled banner' waving majestically.' The shelling went on for days, until 'most of the guns in the enemy's works were silenced.'
With Yorktown exploding around him, at first Cornwallis clung to the hope that the British navy would come to his rescue. When no ships arrived, he finally agreed to surrender."