What BEST describes black soldiers' participation in the Civil War?

Black soldiers played a crucial role in the Civil War, serving in both the Union and Confederate armies, though predominantly in the Union. Approximately 180,000 African American men enlisted in the Union Army, contributing significantly to the war effort and fighting for their liberation and the end of slavery. Their participation helped shift public perception of black individuals and laid the groundwork for future civil rights advancements. Despite facing discrimination and harsh treatment, these soldiers demonstrated bravery and commitment, earning respect and recognition for their contributions.