Brigham Young leads Mormon followers west.
John C. Frémont proclaims the Bear Flag Republic in California.
Iowa becomes a state
W. T. G. Morton successfully uses anesthesia.
Zachary Taylor defeats the Mexicans in two battles north of the Rio Grande.
Congress votes to accept a settlement of the Oregon boundary issue with Britain, thereby ending joint occupancy.
Tariff of 1846.
Colonel Stephen Kearny occupies Santa Fe.
Wilmot Proviso introduced.
Convention of New England Workingmen votes to adopt resolution against slavery.
U.S. wins Battle of Palo Alto; beginning of Mexican War.General Taylor advances on Monterrey