Harriet Tubman played a critical role in the Underground Railroad as a leading figure in the fight against slavery. Escaping from slavery herself, Tubman made 13 missions back to the South, guiding over 70 enslaved individuals to freedom. She utilized various methods, including the North Star for navigation and networks of safe houses, to ensure the safety of those she helped. Tubman's bravery, resourcefulness, and commitment to abolition significantly contributed to the abolitionist movement and made her an enduring symbol of courage and resilience in the struggle for freedom.