People v. Hall
ruling forbids Chinese to testify in American courts.
In an antislavery demonstration, William Lloyd Garrison burns a copy of the U.S. Constitution.
Republican party founded to oppose expansion of slavery.
Fugitive slave Anthony Burns is freed when a mob attacks the Boston courthouse where he is being held; two thousand U.S. troops are called out to capture and return him to his master; he is freed by purchase one year later.
Scientific observation of a sperm and egg fusion provides evidence that men and women contribute equally to reproduction.
The American or Know-Nothing Party founded.
Commodore Matthew C. Perry negotiates the Treaty of Kanagawa, opening two Japanese ports to U.S. trade.Kansas-Nebraska Act supercedes Missouri Compromise.