What did Robert L. O'Connell write?

Robert L. O'Connell wrote The Ghosts of Cannae: Hannibal and the Darkest Hour of the Roman Republic, Fierce Patriot: The Tangled Lives of William Tecumseh Sherman, Sacred Vessels: The Cult of the Battleship and the Rise of the U.S. Navy, Ride of the Second Horseman: The Birth and Death of War and Of Arms and Men: A History of War, Weapons, and Aggression.