On Tuesday, to mark the 150-year anniversary of the start of the Civil War, we aired a segment featuring two African-American men whose ancestors fought with the confederate army. Nelson Winbush and Stan Armstrong said they are proud of their relatives' military service. But to some of our listeners the segment smacked of misinformation. Did African-Americans fight in the Confederate Army in the Civil War? And if so, did they do so out of free will or as enslaved people?