Ulysses S. Grant arrives to take command of all Union armies in March 1864 to the surrender of Robert E. Lee at Appomattox a year later. Over 180,000 black soldiers in the Union army. And most of all, William Tecumseh Sherman launches his scorched-earth March to the Sea. Other events include the rise of Clara Barton; the election of 1864 (which Lincoln nearly lost); the wild and violent guerrilla war in Missouri; and the dramatic final events of the war, including the surrender at Appomattox and the murder of Abraham Lincoln.

Today I'm talking with S.C. Gwynne, author of Hymns of the Republic: The Story of the Final Year of the American Civil War. We discuss unexpected angles and insights on the war. Ulysses S. Grant is known for his prowess as a field commander, but in the final year of the war he largely fails at that. His most amazing accomplishments actually began the moment he stopped fighting. William Tecumseh Sherman was a lousy general, but probably the single most brilliant man in the war. We also meet a different Clara Barton, one of the greatest and most compelling characters, who redefined the idea of medical care in wartime. And proper attention is paid to the role played by large numbers of black union soldiers—most of them former slaves. They changed the war and forced the South to come up with a plan to use its own black soldiers.