"The law of Feb 17, 1864, gave the War Department permission to conscript free blacks, but only in non-combat services such as the Quartermaster Dept, the Commissary Dept, the Medical Dept &c"

There were about 1800 conscripted in Virginia as of January 1865. General Whiting reported 800 in North Carolina in November 1864. South Carolina would have raised several hundred and the other states a few hundred more. In all there may have been about 4,000.