Harriet Tubman was an African American abolitionist and political activist who played a crucial role in the fight against slavery in the United States. Born into slavery around 1822 in Maryland, Tubman escaped to freedom in the North in 1849. She then worked as a conductor on the Underground Railroad, a network of safe houses and secret routes that helped enslaved individuals escape to freedom. Tubman made approximately 13 dangerous missions to the South, personally guiding about 70 people to freedom.

Tubman also worked as a spy, scout, and nurse for the Union Army during the American Civil War. She was the first woman to lead an armed expedition in the war, helping to liberate over 700 enslaved individuals. After the war, Tubman continued her activism in the fight for women's suffrage and civil rights. She became involved in the women's suffrage movement and worked with prominent activists such as Susan B. Anthony.

Harriet Tubman's extraordinary courage and dedication to the cause of freedom have made her a celebrated figure in American history. She is often referred to as the "Moses of her people" for her leadership and determination in helping enslaved individuals escape to freedom. Tubman's legacy continues to inspire generations of people to fight against injustice and oppression. In recognition of her incredible contributions, in 2016, the U.S. Treasury Department announced that Tubman would be featured on the redesigned $20 bill.