- Mar 11 Citizenship granted to Prussian Jews
- Mar 14 US Congress authorizes war bonds to finance War of 1812
- Mar 15 1st Russian settlement in California at Russian River
- Mar 19 The first Spanish constitution is enacted, one of the earliest constitutions ever promulgated
Massive Earthquake in Caracas, Venezuela
Mar 26 Earthquake measuring 7.7 on the Richter scale destroys 90% of Caracas, Venezuela and kills an estimated 15,000 to 20,000 people