There were 11 Confederate and 33 Union units formed in Maryland. There are a handful of first hand accounts and regimental histories available other than our Historical Sketch and Roster volumes. Union service records were published in History and Roster of Maryland Volunteers - 2 Vol. Set by Wilmer, L. Allison, and Confederate records in The Maryland Line in the Confederate Army by William Worthington Goldsborough. These are both incorporated in our Maryland Soldiers Service Records CD-ROM.