Dear Ms. Jones,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Mathew Brady Photographs of Civil War-Era Personalities and Scenes, 1921-1940 in the Records of the Office of the Chief Signal Officer (Record Group 111) and Photograph of Private Hubbard Pryor After Enlistment in 44th U.S. Colored Troops in the Records of the Adjutant General’s Office (Record Group 94) that contains numerous photographs of U.S. Colored Troops during the American Civil War. For access to and/or copies of these photographs, please contact the National Archives at College Park - Still Picture (RDSS) via email at email@example.com. Please ask RDSS to search for other photographs of U.S. Colored Troops found in the Brady collection and related photographs in RDSS holdings.
We suggest that you also review the Library of Congress: Gladstone Collection of African American Photographs for additional photographs for U.S. Colored Troops in its holdings.
You may also wish to review the Smithsonian Institution’s National Museum of African American History and Culture blog post titled United States Colored Troops during the Civil War and the U.S. Army Center of Military History publication titled Freedom by the Sword: United States Colored Troops, 1862-1867 for background information.
We hope this is helpful. Best of luck with your research!