Answer:
1781 at the Battle of Yorktown.
Step-by-step explanation:
The battle of the Yorktown took place on October 19, 1781, and it proved to a vital event which was conclusive to the end of the Revolutionary War. While the Americans on the losing side, General Washington planned a surprise attack on the British forces under General Lord Charles Cornwallis, with the French allies. After the battle and the surrender of Cornwallis, one-third of the British forces laid their arms and the British Parliament passed a resolution in March 1782 calling for the government to end the war.