Final answer:
The French tricked General Henry Clinton by creating a diversion that made him believe they were planning to attack New York City, thereby preventing him from sending troops to assist General Cornwallis.
Step-by-step explanation:
In the American Revolutionary War, the French utilized a deceptive tactic to prevent General Henry Clinton from sending troops to assist General Cornwallis. They staged a strategic maneuver to mislead Clinton into believing that they were planning to attack New York City. This faux threat diverted Clinton's attention and resources away from Cornwallis, allowing the American forces to gain an advantage in the Battle of Yorktown.
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