- Mar 1 Sunday observance in Netherlands regulated by law
- Mar 2 Signing of Kandyan treaty by British invaders and Sri Lankan King
- Mar 3 US declares war on Algiers for taking US prisoners & demanding tribute
- Mar 16 Willem I proclaimed King of the Netherlands, including Belgium
Napoléon Enters Paris
Mar 20 Napoléon Bonaparte enters Paris after his escape from Elba, begins 100-day rule
- Mar 24 Handel & Haydn Society of Boston founded
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