1798

1798 (MDCCXCVIII) was a common year starting on Monday in the Gregorian calendar and a common year starting on Friday in the Julian calendar.

• January 22 – Coup d'état in the Netherlands (Batavian Republic). Unitarian Democrat Pieter Vreede makes an end to the power of the parliament (with a conservative-moderate majority).
• 7 March – French forces invade the Papal States and establish the Roman Republic
• April 7 – The Mississippi Territory is organized from territory from Georgia and South Carolina and is later twice made larger to include disputed land claimed by both the U.S. and Spain
• April 26 – France leaves Geneva
• May 24 – Irish nationalists start bloody rebellion against British occupation.
• June 12 – French take Malta
• June 12 – Coup d'état in the Netherlands (Batavian Republic). Moderates depose Pieter Vreede.
• July 1 – Napoleon's troops land in Egypt
• July 14 – The Alien and Sedition Acts become United States law making it a federal crime to write, publish, or utter false statements about the United States government
• July 21 – Napoleon defeats Mameluke forces near the Pyramids
• July 24 – Napoleon occupies Cairo
• July 30 – Selim III defeats Napoleon in Egypt
• July 31 – Second elections in the Netherlands (Batavian Republic). No general elections this time.
• August 1 – Horatio Nelson defeats the French navy under Admiral Brueys at the Battle of the Nile. Nelson himself is injured on the head.
• August 22 – French troops land at Killala in County Mayo to assist Irish rebellion.
• September 18 – Lyrical Ballads published anonymously by Samuel Taylor Coleridge and William Wordsworth

• Franz Xaver, Baron Von Zach, Scientific Editor, Astronomer, begins editing journals about navigation and the geographic positions of cities.
• XYZ Affair in the U.S., followed by naval battles, but no war is declared.
• First mechanical music boxes
• Alessandro Volta and La Place discover electricity
• The Afghans Army occupied Lahore in Punjab
• Aarau is the temporary capital of the Helvetic Republic
• Alois Senefelder invents lithography
• Eli Whitney contracts with the US Federal Government for 10,000 rifles, which he produces with interchangeable parts
• Charles Brockden Brown publishes the first American Novel Wieland or The Transformation an American Tale

• French Revolution (1789-1799) Revolutionary Wars (1792-1802)-Second Coalition/Egyptian Campaign
• May-October – Irish Rebellion of 1798

for more information, see Category:1798 births.

for more information, see Category:1798 deaths.