site logo
Federal flag

Federal Regiment

100th Pennsylvania Infantry

"Roundheads"

 

Commanding Officer on the Antietam Campaign:
  LCol. David A. Lecky

 

This Regiment's Chain of Command:
  Army - Army of the Potomac
  Corps - Ninth Army Corps
  Division - 1st Division, 9th Corps
  Brigade - 2nd Brigade, 1st Division, 9th 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 22 individuals in the AotW database who were on the Maryland Campaign with this unit:

 

Co. Rank Name Casualty? Details*
ALtMontford, James W.WIA   09/14     We have a picture for this person We have some details for this person
APvtOdenbaugh, Henry C.KIA   09/14     We have some details for this person
APvtSaunders, William KIA   09/14     We have some details for this person
APvtThompson, Andrew MWIA   09/14     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
C SgtRea, Cyrus H.KIA   09/14     We have some details for this person
C PvtSlater, Archibald GeorgeKIA   09/14     We have some details for this person
CCorpWilson, John Patterson        We have some details for this person
ECorpBook, David PorterWIA   09/14     We have a picture for this person We have some details for this person
ELtBook, Samuel JeffersonWIA   09/14     We have some details for this person
EPvtHennon, Joseph W.MWIA   09/14     We have a picture for this person We have some details for this person
FPvtElder, John MWIA   09/14     We have some details for this person
FPvtMcClarren, George KIA   09/14     We have some details for this person
FPvtYoung, James R.KIA   09/14     We have some details for this person
GPvtCrooks, John W.MWIA   09/14     We have some details for this person
KCorpCraven, Richard P.WIA   09/14     We have a picture for this person We have some details for this person
KPvtGordon, Alexander Died (a)   10/11     We have some details for this person
MPvtJordan, Martin KIA   09/14     We have some details for this person
MSgtOliver, Charles         We have some details for this person
F&SLColLecky, David Allen        We have a picture for this person We have some details for this person

 

* If there's a symbol in the Details column ...

We have a picture for this person - We have a picture for this person
We have further details for this person - We have details beyond name and rank
Click on their last name to see more