Harriet Tubman was born into slavery in Maryland around 1820. She escaped in 1849 and became a conductor on the Underground Railroad, making over 13 missions to rescue more than 70 slaves. The Underground Railroad was a secret network that used safe houses and routes to help slaves escape to free states and Canada. Tubman later worked as a scout and nurse for the Union Army during the Civil War and continued supporting the cause of abolition and women's suffrage for the rest of her life until her death in 1913 at around 93 years old.