Historian James McPherson discusses the his book, "Battle Cry of Freedom: The Civil War Era." McPerson explores the American Civil War and introduces some Civil War music. He talks about black soldiers, photography, and reconstruction. Content Warning: This conversation has the presence of outdated, biased, offensive language. Rather than remove this content, we present it in the context of twentieth-century social history to acknowledge and learn from its impact and to inspire awareness and discussion.