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Federal Regiment

100th Pennsylvania Infantry

"Roundheads"

 

Commanding Officer at Antietam:
  LCol. David A. Leckey

 

This Regiment's Chain of Command:
  Army - Army of the Potomac
  Corps - Ninth (IX) Army Corps
  Division - 1st Division, IX Corps
  Brigade - 2nd Brigade, 1st Division, IX Corps


On the Antietam Campaign

"The Battle of South Mountain was a victory for Orlando Willcox's men. Welsh's Brigade, with the Roundheads, attacked a strong Confederate line at Fox's Gap and were successful in driving the enemy from the field. The assault was made over difficult terrain, requiring an advance over steep uphill country."

"The Battle of Antietam on September 17, 1862 proved to be the single-most bloodiest day in the Civil War. The Roundheads were assigned as skirmishers for Welsh's Brigade, and succeeded in driving the Confederates before them into the outskirts of the village of Sharpsburg. The arrival of A.P. Hill's Confederates forced the withdrawal of the entire Ninth Corps back to the Antietam ... Because the 100th Pennsylvania regiment was assigned as skirmishers rather than as part of an assaulting brigade, it was fortunately not as severe a battle for them compared to other regiments. Only two men were killed or mortally wounded in this battle."
(from Gavin)

Statistics

Initial Strength: not known; Killed in Action (KIA): 9; Wounded (WIA): 32;

Maps Showing this Unit

Battlefield Tablets for this Unit

Tablet #56: Ninth Army Corps - 15 Sep, 7 AM to 16 Sep, 3 PM
Tablet #62: Willcox's Division, Ninth Army Corps - 16 Sep, 9 PM to 18 Sep, 6 PM
Tablet #122: Army of the Potomac - 17 Sep, 10 AM to 17 Sep, 6 PM
Tablet #99: Willcox's Division, Ninth Army Corps - 17 Sep, 2 PM to 18 Sep, 9 AM
Tablet #70, cont: Ninth Army Corps - 17 Sep, 3 PM to 17 Sep, 5 PM
Tablet #70: Ninth Army Corps - 17 Sep, 7 AM to 17 Sep, 3 PM
Tablet #57: Ninth Army Corps - 17 Sep, 7 AM to 17 Sep, 5 PM
Tablet #64: Welsh's Brigade, Willcox's Division - 17 Sep, 7 AM to 18 Sep, 5 PM

References & Notes

Source: Gavin, William Gilfillan, History of the 100th Pennsylvania Volunteer Regiment, The Roundhead Regiment, Morningside Books, 1989 - portions extracted online at the 100th Pennsylvania site.

We have 11 individuals in the AotW database for this unit:

 

Co. Rank Name Casualty? Details*
APvtOdenbaugh, H. Died   00/00     We have some details for this person
C PvtBrown, James R.MWIA   09/14     We have some details for this person
CPvtMiller, John C.KIA   09/14     We have some details for this person
CCorpPettit, Frederick         We have a picture for this person We have some details for this person
CPvtWilson, John Patterson        We have some details for this person
FPvtMcClarren, George KIA   09/14     We have some details for this person
GPvtCrooks, George W.Died   10/04     We have some details for this person
MPvtJordan, Martin Died   00/00     We have some details for this person
MSgtOliver, Charles         We have some details for this person
F&SLColLeckey, David Allen        We have a picture for this person We have some details for this person
UnkPvtMcLaughlin, John H.Died   00/00

 

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