Harriet Tubman worked with the Union Army, successfully leading a raid that freed 750 people from slavery—in one night.

This raid attacked the Combahee River, where Confederates placed sea mines. Freedom fighters destroyed 7 plantations, while Harriet organized the liberated onto boats for their escape.

Her work as a Union spy and scout was crucial to their success. Harriet Tubman was the first woman to lead a major military operation in the U.S.