On May 2, 1863, Confederate General Thomas J. Stonewall Jackson led his Second Corps around the unsuspecting Army of the Potomac on one of the most daring flank marches in history. His surprise flank attack launched with the five simple words You can go forward, then collapsed a Union corps in one of the most stunning accomplishments of the war. Flushed with victory, Jackson decided to continue attacking into the night. He and members of his staff rode beyond the lines to scout the ground while his units reorganized. However, Southern soldiers mistook the riders for Union cavalry and opened...