The leader of the underground railroad who aided escaped slaves in the U.S. was Harriet Tubman. Born into slavery, she escaped and subsequently dedicated her life to helping others gain their freedom. Tubman made numerous trips back to the South, guiding enslaved individuals through a network of safe houses and aiding their journey to free states. She became a key figure in the abolitionist movement, symbolizing courage and resilience. Tubman's legacy continues to inspire as a champion for justice and human rights.