Within Reach: After being embarrassed by Maj. Gen. Stonewall Jackson in the Shenandoah Valley in the spring of 1862, 2nd Corps commander Nathaniel Banks had a payback victory within his grasp at Cedar Mountain in August (depicted in this period map). Jackson’s Confederates, however, got the better of Banks again with an improbable late rally. The setback marked the beginning of the end for Pope’s Army of Virginia. (The Protected Art Archive/Alamy Stock Photo)