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Federal Regiment

1st Maryland, PHB

Organized: Frederick, MD; mustered in Aug - Dec 1861
Disbanded/Mustered out: December 1864


Commanding Officer on the Antietam Campaign:
  Col. William P. Maulsby, Sr.


This Regiment's Chain of Command:
  Corps - Middle Department (8th Army Corps)
  Division - Harpers Ferry Garrison
  Brigade - Potomac (Maryland) Home Brigade

Unit history

The First Regiment, Potomac Home Brigade, was a militia unit recruited in western Maryland and from Unionists in neighboring Loudoun County, Virginia. In the spring of 1862 the Regiment was with General Banks' Division in the Shenandoah Valley and then guarded the Baltimore and Ohio Railroad in Maryland and Virginia. In May 1862, they were assigned to Harpers Ferry. On the 27th they skirmished with Confederates at Loudoun Heights, Va. Detachments continued on duty along the B&O RR.

On the Antietam Campaign

In August, the regiment was part of the Federal force watching the Potomac between Sandy Hook and the mouth of the Monocacy. They were ordered into the garrison at Harpers Ferry on 5 September after the first of the Confederate units crossed the Potomac, beginning the Maryland Campaign.

They were captured with the rest of the garrison on 15 September and paroled on the 16th to Annapolis, Maryland.

After the Antietam Campaign

They were exchanged and served in Southern Maryland until the Gettysburg Campaign, where they were in action with the XIIth Army Corps. They took heavy losses in action on the Federal right on the 3rd day there, across the line from the 1st Maryland Infantry (Confederate) .

They returned to duty along the B&O until Early's raid of July 1864, when they saw action at the battle of Monocacy on 9 July.

The regiment's terms of service expired and most men were mustered out by December, 1864. Additional recruiting brought the core of veterans and newer recruits up to a full regiment, becoming the 13th Maryland in April 1865.

References & Notes

Basic unit data above from Wilmer.1

We have 8 individuals in the AotW database who were on the Maryland Campaign with this unit:


Co. Rank Name Casualty? Details*
BCorpOursler, Charles W.KIA   09/13     We have some details for this person
HPvtBoyd, James MWIA   09/00     We have some details for this person
HPvtMarmaduke, Reuben W.AWOL   09/08     We have some details for this person
KPvtGill, Robert N.KIA   09/13     We have some details for this person
KPvtHuggins, James E.KIA   09/13     We have some details for this person
KPvtMann, Charles KIA   09/13     We have some details for this person
KPvtMartin, William T.KIA   09/13     We have some details for this person
F&SColMaulsby, Sr., William P.        We have some details for this person


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1   Wilmer, L. Allison, J. H. Jarrett and Geo. W. F. Vernon, History and Roster of Maryland Volunteers, War of 1861-5, Volume 1, Baltimore: Guggenheimer, Weil, & Co., 1899, pg. 483
Maryland State Archives, Archives of Maryland Online, Published c. 2002, first accessed 01 January 2002, <>, Source page: Volume 367, Page 483  [AotW citation 488]