From Wikipedia.
Thomas Morris Chester the war correspondent was embedded with troops of the XXV Corps, which was unique because it was made up almost entirely of Blacks from the United States Colored Troops. These soldiers had previously belonged to the X and XVIII Corps. They captured Richmond, Virginia and were at Appomattox when the Union forces stopped Lee's retreating Confederate Army.
On December 3, 1864, the two corps of the Union Army of the James were reorganized. Its white units went to the XXIV Corps under the command of General Godfrey Weitzel. The new XXV Corps served with distinction during the waning days of the Petersburg Campaign and was the first army group to occupy Richmond on April 3, 1865.
In May, the Corps was sent to Texas to serve as the "Army of Occupation" against Napoleon III's French presence in Mexico. The XXV Corps was disbanded in January 1866.
--Old Secesh
