Colored Troops Formed in North Carolina During the Civil War War of the Rebellion . Cornell University has placed online all volumes of the War of the Rebellion. Included are scanned images of reports, correspondence, seizures of Southern property, etc. It includes both Union and Confederate accounts. It is in chronological order but there is no online index.
Many libraries have the index.
It's important which one you order. Often contains questionnaires filled out by the pensioner with name of spouse and children, date and place of marriage. Sometimes they show where the man was born. Shows the man's whereabouts during his period in the service. May give details on temporary duty assignments, illnesses or wounds received and show where and when hospitalized.