As a teenage slave, Harriet Tubman stood up to an overseer who was trying to harm another slave. From that time forward, Tubman (above left) fought against unfairness and for what she believed was right. She helped hundreds of African Americans escape on the Underground Railroad. TIME For Kids? Biographies help make a connection between the lives of past heroes and the events of today. Harriet Tubman's courage and ideals have inspired generations of Americans to fight for equal rights and to stand up for their convictions.