The Underground Railroad was a secret network of abolitionists (people who wanted to abolish slavery). They helped African Americans escape from enslavement in the American South to free Northern states or to Canada. The Underground Railroad was the largest anti-slavery freedom movement in North America. It brought between 30,000 and 40,000 fugitives to British North America (now Canada).
This is the full-length entry about the Underground Railroad. For a plain language summary, please see The Underground Railroad (Plain-Language Summary).