This set is not only a roster but an index to the compiled service records in the National Archives. Using the Roster you can determine which U.S. colored troops have records in the archives and exactly how they are listed; the essential information needed for obtaining a service record. Roster includes officers, as much illegible entries as could be transcribed, and alternate names and initials that were inserted above the name on the original cards. 

This set is 2 volumes from Roster of Union Soldiers.

*Note: this 2 volume-subset is included within the Roster of Union Soldiers 1861-1865