How did africans in the south contribute to the war effort in the north?

Africans in the South contributed significantly to the war effort in the North during the Civil War by serving in various capacities, including as soldiers, laborers, and support personnel. Many escaped enslaved individuals joined the Union Army, with around 180,000 African American soldiers serving, playing crucial roles in battles and helping to turn the tide of the war. Additionally, they provided vital logistical support by working on supply lines, constructing fortifications, and serving as scouts and spies. Their contributions were instrumental in the Union's victory and helped to reshape perceptions of African Americans in American society.