1862-1863: the bloodiest period of the war. Lincoln struggles with the question of emancipation, while the Army of the Potomac fights three vicious battles against Lee under three different generals-McClellan, Ambrose Burnside, and Joe Hooker. In the West, Grant continues to struggle with alcoholism and risks not only his friendship with Sherman, but also the entire Union with a daring plan to take fortress Vicksburg. (thetvdb.com)