United States Regiments & Batteries > Pennsylvania
The 123rd Pennsylvania Volunteer Infantry Regiment lost 3 officers and 27 enlisted men killed or mortally wounded and 1 officer and 41 enlisted men to disease during the Civil War.
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1862
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| August | Organized at Allegheny City for nine months service under Colonel John B. Clark |
| August 20-23 | Moved to Harrisburg, Pa., then to Washington, D.C. Attached to 2nd Brigade, 3rd Division, 5th Army Corps, Army of the Potomac. |
| September 6-24 | Maryland Campaign |
| October | Duty at Sharpsburg, Md. |
| October 30-November 19 | Movement to Falmouth, Va. |
| December 12-15 |
Battle of Fredericksburg |
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1863
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| January 20-24 | Burnside’s 2nd Campaign, “Mud March” |
| January-April | Duty at Falmouth |
| April 27-May 6 | Chancellorsville Campaign |
| May 1-5 |
Battle of ChancellorsvilleThe regiment elected to stay on past the expiration of its enliistement until the battle was done. |
| May 13 | Mustered out |