African Americans collecting bones of soldiers killed in the battle at Cold Harbor, Va.

African American group at Aiken's farm Aiken's Landing, Virginia.

African Americans unloading vessels at landing, City Point, Va.

Camp of Tennessee Colored Battery, Johnsonville, Tennessee.

African Americans preparing cotton for the gin on Smith's plantation at Port Royal Island, S.C.

Barges with African Americans on the Canal, ruined buildings beyond at Richmond, Virginia.

 4th U.S. Colored Infantry of Company E, at Fort Lincoln, Washington D.C.

Military railroad operations in northern Virginia African American men using levers for loosening ra…

Military railroad operations in northern Virginia, African American men using levers for loosening r…

Military railroad operations African American laborers working on rail during the U.S. Civil War in …

Military railroad operations African American laborers working on rail in northern Virginia, 1862. "…

African American men repairing single-track railroad after "Battle of Stone's River" at Murfreesboro…

Camp of 27th U.S. Colored Infantry.

1st U.S. colored infantry.

The "Contrabands" with General Meade in Culpeper, Virginia. September 1863. The Civil War term "Cont…

View of farm house with African Americans in Port Royal, South Carolina. 1862.

African American army cook at work, City Point, Virginia.

African American soldier in fortification, Petersburg, Virginia.

African American workers standing on railroad tracks in front of a storage facility at Giesboro cava…

African American workers standing on railroad tracks in front of a storage facility at Giesboro cava…

A group of "Contrabands" standing outside shanty. The Civil War term "Contrabands" was used to descr…

Nicholas Biddle, African American Union soldier in uniform, Pottsville, Pa. The first man wounded in…

Slave dealers in Alexandria, Virginia. (Price, Birch & Co. dealers in slaves) Alexandria, Virginia. …