Final answer:
Napoleon fooled Americans with The Cadore Letter, a forgery that claimed to lift the trade embargo.
Step-by-step explanation:
Napoleon fooled Americans with The Cadore Letter. The Cadore Letter was a forgery created by Napoleon to trick the Americans into believing that he had lifted the trade embargo known as the Berlin and Milan Decrees. The letter stated that American ships would be allowed to trade with France, but in reality, Napoleon had no intention of lifting the embargo.