Decades: 1790s 1800s 1810s 1820s 1830s - 1840s - 1850s 1860s 1870s 1880s 1890s
Years: 1842 1843 1844 1845 1846 - 1847 - 1848 1849 1850 1851 1852
January 4 - Samuel Colt sells his first revolver pistol to the United States government.
January 13 - The Treaty of Cahuenga ends the Mexican-American War in California.
January 16 - John C. Fremont is appointed Governor of the new California Territory.
January 30 - Yerba Buena, California is renamed San Francisco.
February 19 - The Donner Party is rescued. It is noted that some of the survivors seem to be remarkably well-fed considering their ordeal.
February 22 - Mexican-American War: The Battle of Buena Vista - 5,000 American troops under General Zachary Taylor use their superiority in artillery to drive off 15,000 Mexican troops under Antonio Lopez de Santa Anna defeating the Mexicans the next day.
March 9 - Mexican-American War: United States forces under General Winfield Scott invade Mexico near Veracruz.
March 29 - Mexican-American War: United States forces led by General Winfield Scott take Veracruz after a siege.
May 7 - In Philadelphia, the American Medical Association (AMA) is founded.
July 1 - The United States issues its first postage stamps.
July 24 - After 17 months of travel, Brigham Young leads 148 Mormon pioneers into Salt Lake Valley, resulting in the establishment of Salt Lake City.
July 26 - Liberia gains independence.
September 6 - Henry David Thoreau leaves Walden Pond and moves in with Ralph Waldo Emerson and his family in Concord, Massachusetts.
October 12 - German inventor and industrialist Werner von Siemens founds Siemens AG & Halske.
Mexican-American War (1846-1848)
Year in topic
1847 in literature
Wuthering Heights - Emily Bronte
February 11 - Thomas Alva Edison, US inventor.
April 10 - Joseph Pulitzer, journalist and newspaper publisher
March 3 - Alexander Graham Bell, father of the telephone.
November 26 - Princess Dagmar of Denmark, later Emperess consort of Tsar Alexander III of Russia.
January 19 - Charles Bent, New Mexico pioneer
March 9 - Mary Anning, British paleontologist
March 11 - Johnny Appleseed, pioneer, agronomist
May 14 - Fanny Mendelssohn, composer and pianist
Charles Hatchett, English chemist who discovered niobium