Commanding Officer at Antietam:
Col. John B. Clark
A 6-month unit formed largely of Allegheny County men.
On the Antietam Campaign
"At the Capital, the regiment exchanged its arms, Austrian muskets, with which it had at first been supplied, for Springfield rifles. On the morning of the 14th of September, the command started on the march through Maryland, and arrived near Frederick at night-fall of the 16th. Here the division remained during the 17th, under orders to cover Frederick from the direction of Harper's Ferry. At sunset it received orders to move to Antietam, and at the moment of receiving the orders the sound of battle was heard for the first time that day. The command was again put upon the march, and for the entire night, up and down the rugged way it was urged forward and at a little after sunrise on the following morning, was halted on the Antietam battle-field, a short distance from Sharpsburg."1
Battlefield Tablets for this Unit
After the Antietam Campaign
The Regiment continued in service with the Army of the Potomac seeing significant combat at Fredericksburg and Chancellorsville before mustering out.
More on the Web
See Bates' Regimental history of the 123rd transcribed online by Alice J. Gayley on PA-Roots.
We have 6 individuals in the AotW database for this unit:
|B||Pvt||White, Leartes||Died 10/19|
|E||Pvt||Siemon, George Frederick||MWIA 09/14|
|G||Pvt||Fairly, Samuel||Died 11/14|
|I||Pvt||Thompson, William||Died 11/11|
|K||Pvt||Callahan, Peter||MWIA 09/14|
|F&S||Col||Clark, John B|
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