African American regiments were military units composed primarily of African American soldiers, particularly during the American Civil War. These regiments, such as the 54th Massachusetts Infantry Regiment, played a crucial role in the Union Army, fighting for freedom and equality. They faced significant discrimination and were often paid less than their white counterparts, yet they demonstrated bravery and effectiveness in battle. After the Civil War, African American regiments continued to serve in the U.S. military, contributing to various conflicts, including the Spanish-American War and World War I. Their service helped challenge racial stereotypes and laid the groundwork for future integration in the armed forces.