"I thought my men were invincible," admitted Robert E. Lee. A string of battlefield victories through 1862 had culminated in the spring of 1863 with Lee's greatest victory yet: the battle of Chancellorsville. Propelled by the momentum of that supreme moment, confident in the abilities of his men, Lee decided to once more take the fight to the Yankees and launched this army on another invasion of the North. An appointment with destiny awaited in the little Pennsylvania college town of Gettysburg. Historian Dan Welch follows in the footsteps of the Army of Northern Virginia and the Army of the...