1846 events in history

Jan 5 The United States House of Representatives votes to stop sharing the Oregon Territory with the United Kingdom
Jan 28 The Battle of Aliwal, India, is won by British troops commanded by Sir Harry Smith
Jan 31 After the Milwaukee Bridge War, Juneautown and Kilbourntown unify as the City of Milwaukee, Wisconsin
Feb 4 The first Mormon pioneers make their exodus from Nauvoo, Illinois, westward towards Salt Lake Valley
Feb 10 First Anglo-Sikh War: Battle of Sobraon – British defeat Sikhs in final battle of the war
Feb 19 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
Feb 20 Polish insurgents lead an uprising in Kraków to incite a fight for national independence
Apr 14 The Donner Party of pioneers departs Springfield, Illinois, for California, on what will become a year-long journey of hardship, cannibalism, and survival
Apr 25 Thornton Affair: Open conflict begins over the disputed border of Texas, triggering the Mexican–American War
May 1 The few remaining Mormons left in Nauvoo, Illinois, formally dedicate the Nauvoo Temple
May 7 The Cambridge Chronicle, America's oldest surviving weekly newspaper, is published for the first time in Cambridge, Massachusetts
May 8 Mexican–American War: The Battle of Palo Alto – Zachary Taylor defeats a Mexican force north of the Rio Grande in the first major battle of the war
May 11 President James K. Polk asked for and received a Declaration of War against Mexico, starting the Mexican–American War
May 13 Mexican–American War: The United States declares war on Mexico
May 23 Mexican–American War: President Mariano Paredes of Mexico unofficially declares war on the United States
Jun 14 Bear Flag Revolt begins – Anglo settlers in Sonoma, California, start a rebellion against Mexico and proclaim the California Republic
Jun 15 The Oregon Treaty establishes the 49th parallel as the border between the United States and Canada, from the Rocky Mountains to the Strait of Juan de Fuca
Jun 16 The Papal conclave of 1846 concludes. Pope Pius IX is elected Pope beginning the longest reign in the history of the papacy
Jun 19 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
Jul 7 Mexican–American War: American troops occupy Monterey and Yerba Buena, thus beginning the U.S. acquisition of California
Aug 10 The Smithsonian Institution is chartered by the United States Congress after James Smithson donates $500,000
Aug 22 The Second Federal Republic of Mexico is established
Sep 10 Elias Howe is granted a patent for the sewing machine
Sep 12 Elizabeth Barrett elopes with Robert Browning
Sep 14 Jang Bahadur and his brothers massacre about 40 members of the Nepalese palace court
Sep 19 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
Sep 23 Astronomers Urbain Jean Joseph Le Verrier, John Couch Adams and Johann Gottfried Galle collaborate on the discovery of Neptune
Sep 24 Mexican–American War: General Zachary Taylor captures Monterrey
Sep 25 U.S. forces led by Zachary Taylor capture the Mexican city of Monterrey
Oct 10 Triton, the largest moon of the planet Neptune, is discovered by English astronomer William Lassell
Oct 16 William T. G. Morton first demonstrated ether anesthesia at the Massachusetts General Hospital in the Ether Dome
Dec 26 Trapped in snow in the Sierra Nevadas and without food, members of the Donner Party resort to cannibalism
Dec 28 Iowa is admitted as the 29th U.S. state