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Federal Regiment

28th New York Infantry

Organized: Albany, NY; mustered in 05/22/1861
Disbanded/Mustered out: Lockport, NY 06/02/1863


Commanding Officer on the Antietam Campaign:
  Capt. William H. H. Mapes


This Regiment's Chain of Command:
  Army - Army of the Potomac
  Corps - Twelfth (XII) Army Corps
  Division - 1st Division, XII Corps
  Brigade - 1st Brigade, 1st Division, XII Corps

Unit history

The Regiment was organized at Albany in early May 1861 in response to the first call for troops at the outbreak of War. They were mustered into Federal service for two years on 22 May.1

On the Antietam Campaign

By 4 September 1862, at the start of the Maryland Campaign, the Regiment had been decimated by casualties and disease. As a result, they were consolidated into 4 companies, commanded by Captains Fitzgerald, Fenn, Waller and Judd. Captain Mapes, recently returned from recruiting duty in New York was senior officer present and commanded the unit.

The Regiment saw no action at South Mountain on September 14th, and was only briefly under fire on the Federal right at Antietam on the 17th.1


Initial Strength: 65; Killed in Action (KIA): 2; Wounded (WIA): 9; Captured (POW): 1;
Losses, % of Initial Strength: 18.5%

Map Showing this Unit

Battlefield Tablets for this Unit

Tablet #120: Army of the Potomac - 17 Sep, 5 AM to 17 Sep, 12 PM
Tablet #27: Twelfth Army Corps - 17 Sep, 6 AM to 17 Sep, 12 PM
Tablet #28: Williams' Division, Twelfth Army Corps - 17 Sep, 6 AM to 17 Sep, 5 PM
Tablet #29: Crawford's Brigade, Williams' Division - 17 Sep, 9 AM to 17 Sep, 5 PM

We have 5 individuals in the AotW database for this unit:


Co. Rank Name Casualty? Details*
CCaptMapes, William H. H.        We have some details for this person
DPvtChapman, Thomas J.MWIA   09/17
GPvtBryan, Benjamin WIA   09/17
MPvtMcCarty, James Died   09/24     We have some details for this person
UnkPvtCoats, George Died   00/00


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1   Boyce, Charles William, A Brief History of the Twenty-eighth Regiment New York State Volunteers, First Brigade, First Division, Twelfth Corps, Army of the Potomac, Buffalo: C.W. Boyce, 1896  [AotW citation 685]