How did slaves help the union?

Slaves helped the Union by serving as a vital labor force, particularly in agricultural and logistical roles, which allowed Union forces to focus on military operations. Many escaped slaves joined the Union Army, contributing to the fight against the Confederacy and boosting troop numbers. Their involvement not only provided essential manpower but also undermined the Confederate economy by depleting its labor source. Additionally, the Emancipation Proclamation in 1863 further empowered enslaved individuals to fight for their freedom and the Union cause.