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Fugitive Slave Act
This required northerners to return slaves. It became a crime to help freed slaves. It made the north mad! -
Compromise of 1850
In this compromise, California became a free state, the slave trade was banned in DC, and a stronger Fugitive Slave Act was passed. -
Uncle Tom's Cabin
Harriet Beecher Stowe's story of a kindly old slave and his harsh treatment by his master made many northerners aware of the evils of slavery. It created abolitionists.