Napoleon Bonaparte left Egypt to return home to France.
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During World War I, Japan officially declared war on Germany.
India became the fourth nation to successfully land a spacecraft on the Moon.
Chris Messina Tweeted #barcamp, which became the first use of a hashtag on Twitter.
The Albert Bridge opened in London, England.
During the French Revolution, a mass levy was adopted, making it compulsory for any able-bodied men aged 18 to 25 to join military service.
