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Slavery had a big impact because it caused great economic, political, and social tensions between the North and South, leading to armed conflict.

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While the Compromise of 1850 wanted to resolve the issue of slavery, it the exacerbated tensions and contributed to the outbreak of the Civil War.

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The Rebellion sparked fear in the South, leading to stricter slave codes and a hardening of attitudes towards slavery.

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Bleeding Kansas was a period of intense conflict in the Kansas Territory over the issue of slavery.

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The Battle of Fort Sumter was the first military engagement after Southern states has seceded from the Union. The firing signaled that the conflict had escalated from political disagreements to armed conflict.

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Abraham Lincoln's Election took place just before the Civil War.

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Brown's raid was seen as a direct threat to the Southern way of life, as many Southerners feared a larger plot to incite slave rebellions and abolitionist movements.

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The Wilmot Proviso proposed to ban slavery in territories gained from Mexico in 1846.

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The compromise admitted Missouri as a slave state and Maine as a free state to maintain the balance in Congress, but it also banned slavery in the Louisiana Purchase territories.

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The Kansas-Nebraska Act allowed popular sovereignty to decide the issue of slavery in new territories, leading to Bleeding Kansas.

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The First Battle of Bull Run shattered the illusion of a quick and easy victory for both sides, revealing the bloody reality of war and forcing a reassessment of strategies.

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The victory at Chancellorsville boosted Confederate morale and reinforced the perception that the Army of Northern Virginia was invincible. However, the heavy casualties, including Jackson's death, ultimately undermined the Confederacy's long-term strategy

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The Dred Scott decision, which ruled that Black people could not be citizens and that Congress could not ban slavery in territories, significantly exacerbated pre-existing tensions between the North and South, ultimately pushing the nation closer to civil war.