Events from the year 1846 in the United States. In this year, the United States declares war on Mexico, starting the Mexican–American War.
President: James K. Polk (D-Tennessee)
Vice President: George M. Dallas (D-Pennsylvania)
Chief Justice: Roger B. Taney (Maryland)
Speaker of the House of Representatives: John Wesley Davis (D-Indiana)
Congress: 29th
January 5 – The United States House of Representatives votes to stop sharing the Oregon Territory with the United Kingdom.
January 31 – The City of Milwaukee is incorporated in Wisconsin, merging Juneautown, Kilbourntown and Walker's Point following the Milwaukee Bridge War of 1845. Solomon Juneau is elected first mayor.
February 10 – Many Mormons begin their migration west from Nauvoo, Illinois to the Great Salt Lake, led by Brigham Young.
February 19 – In Austin, Texas, the newly formed Texas state government is officially installed.
February 26 – The Liberty Bell is cracked while being rung for George Washington's birthday.
April 25 – Mexican-American War: Open conflict begins over border disputes of Texas' boundaries.
May 8 – Mexican-American War – Battle of Palo Alto: Zachary Taylor defeats a Mexican force north of the Rio Grande at Palo Alto, Texas in the first major battle of the war.
May 13 – Mexican-American War: The United States declares war on Mexico.
June 10 – Mexican-American War: The California Republic declares independence from Mexico.
June 14 – Bear Flag Revolt: American settlers in Sonoma, California start a rebellion against Mexico and proclaim the California Republic.
June 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.
July 7 – Battle of Monterey: Acting on instructions from Washington, D.C., Commodore John Drake Sloat orders his troops to occupy Monterey and Yerba Buena thus beginning the United States annexation of California.
August 10 – Establishment of the Smithsonian Institution in Washington, D.C..
November – The Donner Party becomes snowbound.
December 28 – Iowa is admitted as the 29th U.S. state (see History of Iowa).
The portion of the District of Columbia that was ceded by Virginia in 1790 is re-ceded to Virginia.
Elias Howe patents the sewing machine.
Mexican–American War (1846–1848)
March 25 – William Lee D. Ewing, United States Senator from Illinois in 1834. (born 1795)
September 5 – James Alexander, Jr., United States Representative from Ohio from 1837 till 1839. (born 1789)
September 15 – Samuel A. Foote, 28th Governor of Connecticut from 1834 till 1835. United States Senator from Connecticut from 1827 till 1833. (born 1780)
December 29 – Alexander Barrow, United States Senator from Louisiana from 1841 till 1846. (born 1801)
1846 in the United States Wikipedia (Text) CC BY-SA