4th DELAWARE REGIMENT INFANTRY
     Organized at Wilmington, DE, Jun-Nov 1862. Duty at Fort Delaware and defenses of Balitmore, Sep-Dec 1862. Transferred to Army of the Potomac.

5th MARYLAND REGIMENT INFANTRY
     Organized at Baltimore, Sep 1861. Duty at Fortress Monroe; served at Antietam. Regiment mostly captured at 2nd Winchester, 13-15 Jun 1863. Duty at Fort Delaware, Jan-Jun 1864. Mustered out, 2 Sep 1864.

157th OHIO REGIMENT INFANTRY
     Organized at Camp Chase, OH, 15 May 1864. Duty at Fort Delaware and in the defenses of Baltimore, until Sep 1864. Mustered out, 2 Sep 1864.

6th MASSACHUSETTS REGIMENT INFANTRY (MILITIA, 100 Days)
     Organized at Readville, MA, July 1864. Duty at Fort Delaware, 22 Aug-19 Oct 1864. Mustered out in Boston, 17 Oct 1864.

9th DELAWARE REGIMENT INFANTRY
     Organized at Wilmington, for 100-days, 30 Aug 1864. Duty at Fort Delaware, until Jan 1865. Mustered out, 23 Jan 1865.

[Permanent station artillery units served as guards until July 1865].