One month in 1865 witnessed the frenzied fall of Richmond, a daring last-ditch Southern plan for guerrilla warfare, Lee's harrowing retreat, and then, Appomattox. It saw Lincoln's assassination just five days later and a near-successful plot to decapitate the Union government, followed by chaos and coup fears in the North, collapsed negotiations and continued bloodshed in the South, and finally, the start of national reconciliation. In the...