 Classic works on counter-irregular warfare estimate that the armies seeking to control and defeat guerrillas must commit at least 10 or 15 soldiers for every irregular they are fighting, with as many as 20,000 white and black male unionists statewide, approximately 10,000 of whom joined the Union Army in regiments recruited, white and black Union regiments, four each recruited from the state of North Carolina, and perhaps as many as 23,000