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Passed in 1820, the Missouri Compromise admitted Missouri into the United States as a slave state, and Maine as a free state. It also banned slavery in the Louisiana Purchase lands located north of the 36º 30' line.

No,  I do not think that the Missouri Compromise was a lasting solution to the between slave and free states because if a state like California were to join the United States, it would be difficult since it was north and south of the 36º 30' line.

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In 1846, David Wilmot proposed the idea of the Wilmot Proviso, where slavery would be prohibited in the areas conquered after the Mexican War.

The Wilmot Proviso was protested by the Southerners because they were the ones who mainly used slaves, and such a proposal could mean the beginning of the end of slavery for them.

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In the summer of 1848, a national third-party movement supported the idea of free public land for settlers and opposed slavery in the western territories.

Though the Free Soil Party did not win the presidential election, they attracted very dedicated followers, leading to many people thinking about life without enslavement in the new states in the West.

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This compromise admitted California as a free state, let New Mexico and Utah decide whether they wanted to be slaves states or free states, and defined a new Texas-New Mexico border.

The Compromise of 1850 was hard to pass because Californa had asked it could join the United States as a free state, but it was a problem since it did not match the requirements between the free and slave states in the US Senate.

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This act provided for the seizure and return of runaway slaves who escaped from one state into another or federal territory.

Henry David Thoreau was an abolitionist and gave lectures that were in favor of slaves, as well as defending other abolitionists, such as John Brown.

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This act repealed the Missouri Compromise, created two new territories, and promoted popular sovereignty. This also was the start of an uprising often referred to as the "Bleeding Kansas."

Douglas wanted to repeal the Missouri Compromise and replace it with the Kansas-Nebraska Act because he believed that the Missouri Compromise was causing too much of a disagreement between the North and the South.

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The Kansas-Nebraska Act allowed the settlers to decide whether Kansas would enter the Union as a free state or a slave state. Many activists from both sides flooded in and attempted to influence people one way or another. Many of these clashes led to violence, hence the name "Bleeding Kansas."

I believe that this violence would have occurred either way because if the Missouri Compromise was not repealed, the South would get into many fights with the North because they did not support the Compromise.

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This was a legal case in 1857, in which the US Supreme Court ruled that a slave could not be entitled to freedom even after entering a free state. African Americans would never be seen as US citizens, no matter where you were born.

No, I do not think that the Supreme Court can always be trusted, because back then, there were many people who would vote for the master just because he's white, or just because they did not want to vote for a black African American. There were many flaws in the system of the US Supreme Court.

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In 1858, a series of debates took place between Democratic senator Stephen A. Douglas and Republican Abraham Lincoln. These debates were largely based on slavery and its extension into different territories.

The Freeport Doctrine helped Douglas because many people needed slavery, and believed that it was helpful. This doctrine, however, was hurtful to his cause because many people also believed that slavery was morally wrong, and was not needed.

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In 1859, John Brown (an abolitionist) takes a small group to Harper's Ferry, Virginia in an attempt to start a revolt against slavery at the institution of slavery.

Yes, I do think that John Brown was justified in his plan because there needed to be someone who would take that first step into helping abolish slavery for good.

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The presidential Election that took place in 1860 was mostly between Republican Abraham Lincoln and Democratic Stephen Douglas. This election was mostly based on slavery and states' rights.

Lincoln took advantage of the split Democratic Party and took a plurality of the vote. This helped him with the presidential election of 1860.

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This was the withdrawal of 11 slave states from the Union during 1860 and 1861 after Abraham Lincoln was elected president.

No, I do not think this could have been a long-term solution because these states would eventually need to work with the Union to figure out trade, and they would need a considerate amount of time, considering they don't have a governing document yet.

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There was a battle at Fort Sumter, resulting in one casualty. This was the official start of the Civil War in the United States.

Abraham Lincoln prevented an outbreak of violence by first surrendering. This mainly worked, though it did show weakness from the North.