1st January » French rule ends in Haiti. Haiti becomes the first black republic and second independent country in North America after the United States
14th February » Karadjordje leads the First Serbian Uprising against the Ottoman Empire.
16th February » First Barbary War: Stephen Decatur leads a raid to burn the pirate-held frigate USS Philadelphia 1799 6.
21st February » The first self-propelling steam locomotive makes its outing at the Penydarren Ironworks called Pen-y-Darren Ironworks in Wales.
4th March » Castle Hill convict rebellion named Castle Hill Rebellion: Irish convicts rebel against British colonial authority in the Colony of New South Wales.
10th March » Louisiana Purchase: In St. Louis, Missouri, a formal ceremony is conducted to transfer ownership of the Louisiana Territory from France to the United States.
21st March » Napoleonic Code Code Napoléon is adopted as France French civil law (legal system) civil law.
5th April » High Possil Meteorite: The first recorded meteorite in Scotland falls in Possil.
25th April » The western Georgian kingdom of Imereti accepts the suzerainty of the Russian Empire
13th May » Forces sent by Yusuf Karamanli of Tripoli to Battle of Derne named retake Derna from the United States e.g Americans attack the city.
14th May » The Lewis and Clark Expedition departs from Camp Dubois and begins its historic journey by traveling up the Missouri River.
18th May » Napoleon named Napoleon Bonaparte is proclaimed Emperor of the French by the French Senate.
15th June » New Hampshire approves the Twelfth Amendment to the United States Constitution, ratifying the document.
11th July » Burr–Hamilton duel called A duel occurs in which the Vice President of the United States Aaron Burr mortally wounds former United States Secretary of the Treasury or Secretary of the Treasury Alexander Hamilton.
12th July » Former United States Secretary of the Treasury Alexander Hamilton dies a day after being shot in a Burr–Hamilton duel named duel.
11th August » Francis II, Holy Roman Emperor named Francis II assumes the title of first Emperor of Austria.
1st September » 3 Juno known as Juno, one of the four largest asteroids in the Main Belt, is discovered by the German astronomer Karl Ludwig Harding.
25th September » The Lakota people named Teton Sioux (a subdivision of the Lakota) demand one of the boats from the Lewis and Clark Expedition as a toll for allowing the expedition to move further upriver.
9th October » Hobart, capital of Tasmania, is founded.
30th November » The Democratic-Republican Party Democratic-Republican-controlled United States Senate begins an impeachment trial of Federalist Party (United States) Federalist Associate Justice of the Supreme Court of the United States Supreme Court Justice Samuel Chase
2nd December » At Notre Dame Cathedral in Paris, Coronation of Napoleon I or Napoleon Bonaparte crowns himself List of French monarchs or Emperor of the French, the first French Emperor in a thousand years.