In the 1830s, abolitionism became a political force to be reckoned with. In the face of harassment and mob violence, Black and white abolitionists staged rallies, published newspapers, and flooded Congress with antislavery petitions. Increasingly, they made up the rank and file of the Underground Railroad.

But pro-slavery forces emboldened kidnappers to roam the streets of northern cities, hunting for fugitive slaves and free Black people, many of them children. In New York City, Black activists fought back with a radical new self-defense organization.

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