Underground Railroad: A network of secret routes and safe houses used by enslaved African-Americans to escape into free states and Canada with the aid of abolitionists.
Frederick Douglass: An escaped slave who became a prominent activist, author, and public speaker. He became a leader in the abolitionist movement that sought to end the practice of slavery before and during the Civil War.
William Lloyd Garrison: A prominent American abolitionist, journalist, suffragist, and social reformer. He is best known as the editor of The Liberator (1831–65), which gained nationwide notoriety for its uncompromising advocacy for emancipation.