In August and September 1862 Confederate armies were on the move northward. Robert E. Lee was invading Maryland, Earl Van Dorn and Sterling Price were moving into Tennessee, and Braxton Bragg and Edmund Kirby Smith were advancing into Kentucky. James McPherson, in his acclaimed Battle Cry of Freedom, cites this period as the first of the four major turning points of the American Civil War. The Confederate counteroffensive defeated Union hopes to end the war in 1862. However, by mid-October, hard on the heels of the broad Confederate advance the Union forces had regained the strategic and operational advantage, cited by McPherson as the second turning point of the war. Union victories at Antietam in the east and Perryville in the west carried significant weight in determining the final outcome of the conflict. While vast literature surrounds the former battle Perryville has been somewhat neglected. This work seeks to alleviate that lacuna. The US Army has used Civil War and other battlefields as "outdoor classrooms" to educate and train its officers. Since 1983 the Combat Studies Institute has produced a series of staff ride guides to assist units and classes in this training. The most recent volume in that series, Dr. Robert Cameron's Staff Ride Handbook for the Battle of Perryville, 8 October 1862, is a valuable study that examines the key considerations in planning and executing the September-October campaign and battle. Modern tacticians and operational planners will find themes that still resonate. Cameron demonstrates that Civil War leaders met their challenging responsibilities with planning, discipline, ingenuity, leadership, and persistence-themes that are well worth continued reflection by today's officers.