ap - arch

In this photo provided by the Library of Congress, a group of "Freedmen" African Americans pose by a canal in Richmond, Va., during the Civil War in A...

In this photo provided by the Library of Congress, a Federal Army encampment during the Civil War in Cumberland Landing, Va., is seen from above, May...

**EDS NOTE: GRAPHIC CONTENT** In this photo provided by the Library of Congress, dead Confederate soldiers lie in a ditch on the right wing used as a...

In this photo provided by the Library of Congress, the ruins of Fort Sumter are pictured, Charleston Harbor, S.C., during the Civil War, circa 1865. (...

In this photo provided by the Library of Congress, a dead Confederate soldier lies at the scene of Confederate Lt. Gen. Richard S. Ewell's attack, May...

In this photo provided by the Library of Congress, the "Sunken Road" at Antietam, Md., is pictured in September of 1862, following the Battle of Antie...

In this photo provided by the Library of Congress, Union general Winfield Scott Hancock is seated, facing right, and in uniform, for a half-length por...

In this photo provided by the Library of Congress, abolitionist Frederick Douglass is facing right, seated for a head-and-shoulders portrait at an unk...

In this photo provided by the Library of Congress, a Federal prisoner, returned from prison, is seated in a full-length portrait, circa 1861-1865 duri...