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  The Kansas-Nebraska act opened new territories to slavery with popular sovereignety. A bloody conflict over whether Kansas would become a slave state was triggered by it. Today, it is known as Bleeding Kansas.
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  The Republican party was formed by remnants of the Whig Party to oppose the spread of slavery.
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  In this case, Dred Scott, a slave, attempted to sue for his freedom. Unfortunately for him, the Supreme Court ruled that he was not a U.S. citizen because he was black. This sparked outrage within the abolitionist movement.
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  John Brown, a radical abolitionist, attempted to seize weapons from the armory at Harper's Ferry to arm slaves for a revolt. Unfortunately, he was captured by militias and the U.S. Marines and hanged. Northern abolitionists honored him as a hero, and Southerners were horrified by it.
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  Lincoln won the election with 40% of the popular vote over Democrat John C. Breckinridge, Constitutional Unionist John Bell, and Northern Democrat Stephen Douglas. This triggered the secession of seven southern states.
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  In response to Lincoln's election, South Carolina seceded.
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  In response to Lincoln's election, Mississippi seceded
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  In response to Lincoln's election, Florida seceded.
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  In response to Lincoln's election, Alabama secedes.
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  In response to Lincoln's election, Georgia secedes.
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  Louisiana seceded in response to Lincoln's election
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  In response to Lincoln's election, Texas seceded.
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  After Fort Sumter was resupplied, Confederate artillery fired on Fort Sumter.