- Mar 2 Long-distance communication speeds up with the unveiling of a semaphore machine in Paris
- Mar 3 1st US internal revenue act (taxing distilled spirits & carriages)
- Mar 3 Congress establishes US Mint
- Mar 4 First Jewish member of US Congress, Israel Jacobs (PA), takes office
- Mar 4 President Washington calls the US Senate into its first special session
- Mar 4 Vermont admitted as 14th state (1st addition to the 13 colonies)
- Mar 10 John Stone of Concord, Massachusetts, patents a pile driver
- Mar 10 Pope condemns France's Civil Constitution of the clergy
- Mar 11 Samuel Mulliken is 1st to obtain more than one US patent
Historic Publication
Mar 18 Robert Burns poem “Tam o’ Shanter,” is published in the "Edinburgh Herald"
- Mar 21 Captain Hopley Yeaton becomes 1st commissioned officer in the Revenue Marine, later the Revenue Cutter Service, the forerunner of the modern US Coast Guard