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Unit

Federal Regiment

100th Pennsylvania Infantry

"Roundheads"
Commanding Officer:
  LCol. David A. Leckey
Statistics for Maryland Campaign
  Initial Strength: not known
  Killed in Action (KIA): 9
  Wounded (WIA): 32

Maps Showing this Unit:
   Detail Map #9: Burnside Attacks the Lower Bridge
   Detail Map #11: Burnside Climbs Toward Sharpsburg
   Detail Map #12: AP Hill Hits Burnside's Flank

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

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



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In 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)

References, Sources, and other 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 9 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
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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