Editing 1791 (section)

=== January&ndash;March ===

* [[January 1]] &ndash; Austrian composer [[Joseph Haydn]] arrives in England, to perform a series of concerts.
* [[January 2]] &ndash; [[Northwest Indian War]]: [[Big Bottom Massacre]] &ndash; The war begins in the Ohio Country, with this massacre.
* [[January 12]] &ndash; [[Holy Roman Empire|Holy Roman]] troops reenter [[Liège]], heralding the end of the [[Liège Revolution]], and the restoration of its [[Prince-Bishopric of Liège|Prince-Bishops]].
* [[January 25]] &ndash; The [[Parliament of the United Kingdom|British Parliament]] passes the [[Constitutional Act 1791]], splitting the old [[Province of Quebec (1763–91)|province of Quebec]] into [[Upper Canada|Upper]] and [[Lower Canada]].
* [[February 8]] &ndash; The [[First Bank of the United States|Bank of the United States]], based in Philadelphia, is incorporated by the federal government with a 20-year charter and started with $10,000,000 capital.<ref name="Harper1791">''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p169</ref>
* [[February 21]] &ndash; The United States opens [[Portugal–United States relations|diplomatic relations]] with [[Kingdom of Portugal|Portugal]].
* [[March 2]] &ndash; [[French Revolution]]:
** The abolition of [[guild]]s is enacted.
** A mechanical [[semaphore line]] for rapid long-distance communication is demonstrated by [[Claude Chappe]] in Paris.
* [[March 4]] &ndash; [[Vermont]] is [[admission to the Union|admitted]] as the 14th [[U.S. state]].
* [[March 13]] &ndash; [[Thomas Paine]]'s chief work ''[[Rights of Man]]'' (first part) is published in London.<ref name=HF>{{cite book|title=The Hutchinson Factfinder|publisher=Helicon|year=1999|isbn=1-85986-000-1}}</ref>
* [[March]] &ndash; [[French Revolution]]: In France, the [[National Constituent Assembly (France)|National Constituent Assembly]] accepts the recommendation of its Commission of Weights and Measures that the nation should adopt the [[metric system]].