February 17– The British House of Commons votes not to allow MP John Wilkes to take his seat after he wins a by-election, on the grounds that he was an outlaw when standing.
March 16–Louis Antoine de Bougainville returns to Saint-Malo, following a three-year circumnavigation of the world with the ships Boudeuse and Étoile, with the loss of only seven out of 330 men; among the members of the expedition is Jeanne Baré, the first woman known to have circumnavigated the globe. She returns to France some time after Bougainville and his ships.
May 19– Cardinal Giovanni Vincenzo Antonio Ganganelli is elected as the 249th pope, succeeding the late Clement XIII and choosing to take the regnal name of Pope Clement XIV.
July 20– Recently appointed as the Governor of Spanish Louisiana, Irish-born soldier of fortune Alejandro O'Reilly sails into the French fort of La Balize with 21 Spanish ships, along with 2,056 soldiers, cannons and ammunition, and informs French Louisiana Governor Charles Philippe Aubry of his royal commission to take Louisiana on behalf of the King of Spain.
August 18–Brescia Explosion: The city of Brescia, Italy is devastated when the Church of San Nazaro is struck by lightning. The resulting fire ignites 200,000lb (90,000kg) of gunpowder being stored there, causing a massive explosion, which destroys 1/6 of the city and kills 3,000 people.
September– Massive droughts in Bengal lead to the Bengal famine of 1770, in which ten million people, a third of the population, will die, the worst natural disaster in human history (in terms of lives lost).
October 9– In the first encounter between the Māori people and Europeans (at the future site of Gisborne, New Zealand), one Maori is shot and killed after he steals a sword from one of the officers of the Cook expedition. Several more Māori are killed in fighting the next day.
↑Palmer, Alan; Palmer, Veronica (1992). The Chronology of British History. London: Century Ltd. pp.224–225. ISBN0-7126-5616-2.
↑Roll, Eric (1930). An Early Experiment in Industrial Organization: History of the Firm of Boulton and Watt 1775-1805. London: Frank Cass and Company. p.13.
↑Terry, Martin; Hall, Susan (2008). Cook's Endeavour Journal: The Inside Story. Canberra: National Library of Australia. p.90.
↑Jones, Oakah L. Jr. (1997). "Spanish Penetrations to the North of New Spain". In Allen, John Logan (ed.). North American Exploration, Volume 2: A Continent Defined. Lincoln: University of Nebraska Press. p.62.
↑Barrow, John (1807). Some Account of the Public Life, and a Selection from the Unpublished Writings of the Earl of Macartney. Vol.II. London: Cadell and Davies. p.151.