Final answer:
Harriet Tubman, a key figure in the abolitionist movement, influenced Lincoln to allow African Americans to fight in the Union army.
Explanation:
Harriet Tubman was the runaway slave and abolitionist who encouraged Abraham Lincoln to allow African Americans to fight in the Union army. She played a crucial role in helping slaves escape to freedom through the Underground Railroad, freeing over 300 people from Southern slavery. Tubman's bravery and activism contributed significantly to the eventual recognition of African Americans' freedom and their service in the Civil War.
Learn more about Harriet Tubman and African American participation in the Union army during the Civil War here:
https://brainly.com/question/278824
