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The Tallmadge Amendment stated the Missouri could only join the union as a free state. This started the tension between Northerners and Southerners

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The Missouri Compromise annexed Missouri as a slave state, and Maine as a free state. This balanced the amount of free and slave states, yet still caused outrage among both the North and South.

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Texas was annexed as a slave state, which angered the North as the more slave states there were, the more political power the South would have.

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The Wilmot Proviso stated that slavery would not be permitted on any land acquired from Mexico. This caused outrage among Southerners and increased the tension between the two parties.

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The Compromise of 1850 admitted California as a free state, and allowed the Utah and New Mexico territories to choose tp become a free or slave state. Rather than making everyone happy, this compromise caused outrage in the North and South and increased tensions between the North and South. The South also thought about peacefully leaving the Union as a result of the compromise.

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Uncle Tom's Cabin was published in 1852 and showed everyone the horrors of slavery. This book made northerners even angrier about slavery.

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The Kansas-Nebraska act allowed settlers to vote on whether Kansas and Nebraska would become free or slave states, this not only violated the Missouri compromise, but also caused anger amongst the North and South leading to tensions increasing and a big fight to break out.

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Bleeding Kansas was a byproduct of the Kansas-Nebraska act. People came to Kansas some for and some against slavery and started fighting, this left many wounded and increased tensions between the North and South to an all time high.

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The Dread Scott Decision was a ruling made by the Supreme Court about a man who believed that his trip to Missouri made him a free man. They ruled that he was not a free man and that he didn't even have the right to take the case to the supreme court because he was an African American. This caused outrage in the North.

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John Brown's raid horrified the South. John Brown raided Harpers Ferry for weapons to give to abolitionists in order to simply kill every slave owner. This horrified the South for obvious reasons, and set the scene for a civil war.

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Abraham Lincoln is elected president which told the South that they no longer had more political power than the North. This caused the South to Secede from the Union leading to the civil war.