Just like in previous decades, the United States had to deal with the problem of slavery in the Western territories.
As shown in the previous section (
5.3), the US took over the
Mexican Cession land after the
Treaty of Guadalupe Hidalgo ended the
Mexican American War. California quickly needed statehood because of the massive settler influx during the
California Gold Rush, but there was no slave state seeking admission to the Union to keep the balance of states in the Senate.
The great statesmen of the day, Henry Clay, Daniel Webster, and Stephen Douglas passed five separate acts to keep the Union together (you need to know the first two; the last three are minor details):
While this Compromise was rightly hailed for keeping the Union together, it failed within just four years: the admission of more free states without slave states angered the South and the new Fugitive Slave Act caused outrage in the North.