The French celebrate that day because it commemorates the Storming of the Bastille on July 14, 1789. It was a turning point of the French Revolution. Also, Fete de Federation was held on July 14,1790. It was a way to celebrate the constitutional monarchy in France.
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~Bob Ross™
The U.S. used every form of media to promote propaganda, including radios, posters, leaflets, comic books, movies, magazines, newspapers.