Uprisings of workers in Germany and France are put down; William Weitling and Joseph Weydemeyer, friends of Marx and Engels, flee to the U.S.
Ohio rescinds Black Laws.
John Humphrey Noyes starts the Oneida Community.
Free-Soil Party formed.Treaty of Guadalupe Hidalgo; ends war with Mexico, U.S. gains California and New Mexico, and Mexico recognizes U.S. annexation of Texas.
Wisconsin admitted to the Union.
Zachary Taylor elected President.
Blacks disenfranchised in Wisconsin.Discovery of Gold in California (January 24).
Karl Marx and Friedrich Engels publish The Communist Manifesto
Presbyterian church splits over slavery issue.Women's Rights Convention held in Seneca Falls, New York (July 19).