During the French Revolution France established a state-sponsored atheistic religion called the Cult of Reason to replace Catholicism. It only lasted about a year and was later banned by Napoleon.
Napoleon was once interested in considering a submarine as a weapon in his military arsenal to combat ships. When it came time to look at the Nautilus, designed by American inventor Robert Fulton, Napoleon decided that Fulton was a swindler and a charlatan after learning the vessel leaked.
Napoleon’s planned invasion of the United Kingdom was financed by the Louisiana Purchase, with the US getting part of the money from a loan from a British Bank. So the UK was essentially funding an invasion of themselves.
Napoleon had a healthy obsession with Australia his whole life. Had he won at Waterloo he intended to name part of Australia “Terre Napoléon” (Napoleon Land) and brought back 200+ species of Australian flora and fauna to France, making Josephiné the first person in history to breed black swans.
One of the adversities that the Napoleonic army faced in Russia was the fact that the buttons of their uniforms may have turned to dust. Tin was the major metal used to make buttons and the bonding structure of tin atoms begins to change when temperatures drop below 13°C.
French Texans planned to use a primitive submarine to smuggle Napoleon, from exile, into America and start another Empire there.