Final answer:
Frederick Douglass encouraged free Black men during the Civil War to join and fight in the Union Army. He believed this would help establish their rights and citizenship. He also served as a recruiter and helped form regiments.
Step-by-step explanation:
During the Civil War, Frederick Douglass strongly urged free Black men to serve in the Union Army. His belief resided in the idea that if African-Americans participated and contributed to the war cause, it could help secure their citizenship rights.
Douglass himself served as a recruiter and helped to form regiments of African Americans such as the 54th Massachusetts Infantry Regiment. Serving in the army, in Douglass's view, allowed the Black men to demonstrate their patriotisme and commitment to the country, helping to break down racial barriers and stereotypes.
Learn more about Frederick Douglass