Emperor Napoleon I is defeated at the Battle of Laon in France.

Napoleon Bonaparte, later known by his regnal name Napoleon I, was a French general and statesman who rose to prominence during the French Revolution and led a series of military campaigns across Europe during the French Revolutionary and Napoleonic Wars from 1796 to 1815. He led the French Republic as First Consul from 1799 to 1804, then ruled the French Empire as Emperor of the French from 1804 to 1814, and briefly again in 1815. He was King of Italy from 1805 to 1814 and Protector of the Confederation of the Rhine from 1806 to 1813.

The Battle of Laon, fought on March 9–10, 1814, was a pivotal engagement during the waning months of the Napoleonic Wars. Blücher's Prusso-Russian force defeated French Emperor Napoleon at Laon town.

March 10 is the 69th day of the year in the Gregorian calendar; 296 days remain until the end of the year.