Mic, you probably have this info ;
U S Colored Troops from Carroll Parish:
47th U. S. Colored Infantry Regiment, 8th La. Infantry (African Descent)
48th U. S. Colored Infantry Regiment, 10th La. Infantry (African Descent)

U S Colored Troops from the area:
Goodrich's Landing, and around there.
52nd U. S. Colored Infantry
63rd U.S. Colored Infantry, 9th La. (African Descent) - Memphis and Island No. 10, Tennessee, Vicksburg, Mississippi and Goodrich's Landing, Louisiana.
Milliken's Bend:
49th U. S. Colored Infantry Regiment, 11th La. Infantry (African Descent)
51st U. S. Colored Infantry Regiment, 1st La. Infantry (African Descent)

Certainly sounds like combat troops?