Original: After escaping from slavery , into which she was born , she made thirteen missions to rescue more than 70 slaves using the network of antislavery activists and safe houses known as the Underground Railroad .
Simplified: Harriet Tubman ( born Araminta Ross ; c. 1820 or 1821 -- March 10 , 1913 ) was an African-American abolitionist , humanitarian , and Union spy during the American Civil War .