Near the end of the American Civil War, an entire unit of one hundred Union sharpshooters vanish into thin air in a rugged, mountainous region. To shed light on their mysterious disappearance ...

2. Pontoon Bridges Bridging the Rappahannock River is a formidable, all-day task for Union troops. As pontoniers begin construction on the morning of December 11, Confederate sharpshooters open fire.