Final answer:
The Underground Railroad was a network of secret routes and safe houses that aided slaves in escaping to freedom with the help of abolitionists.
Explanation:
The Underground Railroad was a network of secret routes and safe houses used by nineteenth-century black slaves in the United States to escape to Northern free states and Canada with the aid of abolitionists. The term is also applied to the abolitionists who aided the fugitives. Some routes led to Mexico or overseas. It consisted of meeting points, secret routes, transportation, safe houses, and assistance from various backgrounds.
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