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Frederick Douglass was an American social reformer, abolitionist, orator, writer, and statesman. After escaping from slavery in Maryland, he became a national leader of the abolitionist movement in Massachusetts and New York, gaining note for his oratory and incisive antislavery writings.

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Dred Scott was an enslaved African American man in the United States who unsuccessfully sued for his freedom and that of his wife and their two daughters in the Dred Scott v. Sanford case of 1857, popularly known as the "Dred Scott case"

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In human social behavior, discrimination is treatment or consideration of, or making a distinction towards, a person based on the group, class, or category to which the person is perceived to belong.

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The American Civil War was a war fought in the United States from 1861 to 1865, between the North and the South. The Civil War is the most studied and written about episode in U.S. history.

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The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states on the status of territories acquired during the Mexican–American War.

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A blockade is an effort to cut off supplies, war material or communications from a particular area by force, either in part or totally. A blockade should not be confused with an embargo or sanctions, which are legal barriers to trade.

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Abraham Lincoln was an American statesman, politician, and lawyer who served as the 16th president of the United States from 1861 until his assassination in April 1865. Lincoln led the nation through the American Civil War, its bloodiest war and its greatest moral, constitutional, and political crisis.

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the state of being abolished; annulment; abrogation: the abolition of unjust laws; the abolition of unfair taxes. the legal prohibition and ending of slavery, especially of slavery of blacks in the U.S.