- February 2: Napoleon Bonaparte defeats the Papal States at the Battle of Ancona.
- February 19: The French and Austrian armies sign the Treaty of Campo Formio, ending the War of the First Coalition.
- October 12: Admiral Horatio Nelson destroys the French fleet at the Battle of Aboukir Bay.
- December 6: George Washington dies at Mount Vernon.
1798
- January 22: The French Directory establishes the Roman Republic.
- March 11: The United States and France sign the Treaty of Mortefontaine, ending the Quasi-War.
- May 19: Napoleon Bonaparte launches an invasion of Egypt.
- August 1: Admiral Nelson defeats the French fleet at the Battle of the Nile.
1799
- January 9: The British and Russian armies land in the Netherlands, beginning the War of the Second Coalition.
- March 25: Napoleon Bonaparte returns to France from Egypt.
- September 30: Napoleon overthrows the Directory and establishes the Consulate.
- November 9: Napoleon defeats the Austrians at the Battle of Marengo.
1800
- January 1: Prussia withdraws from the Second Coalition.
- February 9: The Treaty of Mortefontaine is ratified by the United States and France.
- June 4: Napoleon defeats the Austrians at the Battle of Hohenlinden.
- December 24: The Holy Roman Emperor, Francis II, signs the Treaty of Lunéville, ending the Second Coalition.
1801
- January 31: The Act of Union unites Great Britain and Ireland into the United Kingdom of Great Britain and Ireland.
- March 8: The Treaty of Amiens is signed, ending the war between France and Britain.
- June 12: Thomas Jefferson is elected President of the United States.
- December 12: Russia withdraws from the Second League of Armed Neutrality.