The American Civil War occurred at a time when photography was really coming into its own as a medium. The historic conflict was extensively documented - from pictures of prominent generals and politicians, to individual portraits of regular soldiers, and sobering images of battlefields. Photographers snapped pictures of about everything they could, given the technical limitations of the time (long exposure times meant no action shots were possible).
It's a priceless photographic record, but sometimes adding a touch of color helps to bring it all home. Colorized photos (whether handcrafted or made with software like Image Colorizer) can trick the brain into thinking an image is more modern and immediate than it actually is, which can in turn humanize distant historical events.
Ulysses S. Grant At Cold Harbor, June 1864Photo: Egbert Guy Fowx / Library of Congress, Prints & Photographs Division, Civil War Photographs / No Known RestrictionsBrings history to life?
USCT Soldiers At Dutch Gap, Virginia, 1864Photo: Library of Congress, Prints & Photographs Division, Civil War Photographs / Wikimedia Commons / Public DomainBrings history to life?
Union Nurse Clara BartonBrings history to life?
Confederate Spy Rose Greenhow In Prison With Her Daughter, 1862Brings history to life?