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The issue of slavery was extremely controversial, it was whether slavery should or shouldn't be outlawed in the states.  Northerners wanted to abolish slavery while Southerns wanted to expand it.  This deepened sectionalism between the North and the South because of their mixed beliefs on the issue of slavery for the future of the nation.

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In 1845, Texas was admitted as a slave state which resulted in the Mexican-American War. The annexation of Texas was very controversial because it would unbalance the ratio of slave states to free states. They held off annexing Texas until Polk became president. When it was finally annexed, after Polk became president, tension grew between the U.S. and Mexico.

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The Dred Scott v. Stanford controversy in 1846-1857 happened when Dred Scott's owner died while they were in a free state, Dred Scott argued that since he was a free state while his owner died, he should be considered a free black. The Supreme Court denied his freedom and ruled that no black could claim U.S citizenship or petition a court. This ruling by the Supreme Court deemed the Missouri Compromise unconstitutional which created more debates and tension between the North and the South.

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The Kansas Nebraska Act of 1854 nullified the Missouri Compromise, made Kansas and Nebraska states, and made it so that it was popular sovereignty that decided if a state would be a free state or slave state. Due to popular sovereignty, people were for and against slavery tried settling in the new territory Kansas in order for it to become the state they desire. This led to violence between both sides since they were both contesting the territory. This was known as bleeding Kansas and it created more tension between the North and the South.

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1859 - John Brown's Raid on Harpers Ferry

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1859 - John Brown's Raid on Harpers Ferry

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John Brown's Raid on Harper's Ferry had John Brown gather a group of people to start an attack that would hopefully bring a rebellion to slavery in the United States. The event would cause Southerner's to fear and to be angry at the Northerners as it would show what actions they would do to stop slavery. The actions would also be able to show insight on how violence would be needed to stop slavery throughout the United States.

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The Election of 1860 had 4 candidates, Abraham Lincoln, Stephen Douglass, John C. Breckenridge, and John Bell, running for president of the United States of America. The South would disagree with Abraham and try to make sure that he didn't win by taking him out of the ballot, but by the end of the election Abraham Lincoln won the election and became president. It would cause more tension between the North and the South as it would have the South see that they are becoming more powerless to the point that they cannot win an election if they wanted to. The events would be able to lead to the Civil War starting shortly afterwards.

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The seceding of South Carolina was the action where the state South Carolina would dismiss itself from the union and try to become their own country. The seceding would be caused by the results of the Election of 1860 occurring and having Abraham Lincoln, someone that opposed slavery, become president. The action of South Carolina seceding would begin to have some more Southern countries secede and join South Carolina.

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1861 - Shots Fired at Fort Sumter = Civil War Starts

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1861 - Shots Fired at Fort Sumter = Civil War Starts

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The Battle of Fort Sumter was the main action that would start the Civil War with the North against the South. The area would have the South battling the North on April 12th and would continue until the South surrendered on April 14th. After the Battle, President Lincoln would have people joining the army to fight for the North and go against the South. The action would lead to more states seceding and going to join the South in the Civil War.