Important Historical Events of the year 1846, Year 1846 in History

List of 1846 Major News Events in History, Most Important Historical Events in 1846

What happened in the year 1846?

Date	Event
January 23, 1846	Slavery in Tunisia is abolished.
January 28, 1846	The Battle of Aliwal, India, is won by British troops commanded by Sir Harry Smith.
January 31, 1846	After the Milwaukee Bridge War, the United States towns of Juneautown and Kilbourntown unify to create the City of Milwaukee.
February 4, 1846	The first Mormon pioneers make their exodus from Nauvoo, Illinois, westward towards Salt Lake Valley.
February 10, 1846	First Anglo-Sikh War: Battle of Sobraon: British defeat Sikhs in the final battle of the war.
February 19, 1846	In Austin, Texas the newly formed Texas state government is officially installed. The Republic of Texas government officially transfers power to the State of Texas government following the annexation of Texas by the United States.
February 20, 1846	Polish insurgents lead an uprising in Kraków to incite a fight for national independence.
April 25, 1846	Thornton Affair: Open conflict begins over the disputed border of Texas, triggering the Mexican–American War.
May 1, 1846	The few remaining Mormons left in Nauvoo, Illinois, formally dedicate the Nauvoo Temple.
May 7, 1846	The Cambridge Chronicle, America's oldest surviving weekly newspaper, is published for the first time in Cambridge, Massachusetts.
May 8, 1846	Mexican–American War: American forces led by Zachary Taylor defeat a Mexican force north of the Rio Grande in the first major battle of the war.
May 12, 1846	The Donner Party of pioneers departs Independence, Missouri for California, on what will become a year-long journey of hardship and cannibalism.
May 13, 1846	Mexican–American War: The United States declares war on the Federal Republic of Mexico following a dispute over the American annexation of the Republic of Texas and a Mexican military incursion.
May 22, 1846	The Associated Press is formed in New York City as a non-profit news cooperative.
May 23, 1846	Mexican–American War: President Mariano Paredes of Mexico unofficially declares war on the United States.
June 14, 1846	Bear Flag Revolt begins: Anglo settlers in Sonoma, California, start a rebellion against Mexico and proclaim the California Republic.
June 15, 1846	The Oregon Treaty extends the border between the United States and British North America, established by the Treaty of 1818, westward to the Pacific Ocean.
June 16, 1846	The Papal conclave of 1846 elects Pope Pius IX, beginning the longest reign in the history of the papacy.
June 19, 1846	The first officially recorded, organized baseball game is played under Alexander Cartwright's rules on Hoboken, New Jersey's Elysian Fields with the New York Base Ball Club defeating the Knickerbockers 23–1. Cartwright umpired.
July 7, 1846	US troops occupy Monterey and Yerba Buena, thus beginning the US conquest of California.
August 22, 1846	The Second Federal Republic of Mexico is established.
September 10, 1846	Elias Howe is granted a patent for the sewing machine.
September 12, 1846	Elizabeth Barrett elopes with Robert Browning.
September 14, 1846	Jang Bahadur and his brothers massacre about 40 members of the Nepalese palace court.
September 19, 1846	Two French shepherd children, Mélanie Calvat and Maximin Giraud, experience a Marian apparition on a mountaintop near La Salette, France, now known as Our Lady of La Salette.
September 23, 1846	Astronomers Urbain Le Verrier, John Couch Adams and Johann Gottfried Galle collaborate on the discovery of Neptune.
September 24, 1846	Mexican–American War: General Zachary Taylor captures Monterrey.
October 10, 1846	Triton, the largest moon of the planet Neptune, is discovered by English astronomer William Lassell.
October 16, 1846	William T. G. Morton administers ether anesthesia during a surgical operation.
December 24, 1846	British acquired Labuan from the Sultanate of Brunei for Great Britain.
December 28, 1846	Iowa is admitted as the 29th U.S. state.