The 124th Pennsylvania Volunteer Infantry Regiment lost 1 officer and 17 enlisted men killed or mortally wounded and 36 enlisted men to disease during the Civil War. It is honored by a monument at Antietam.

1862
August Organized at Harrisburg for nine months service under Colonel Joseph W. Hawley, Lt. Colonel Simon Litzenberg and Major I. Law Haldeman
August 12 Left State for Washington, D.C. and camp near Fort Albany, Defenses of Washington
September 7 March to Rockville, Md., and attached to 1st Brigade, 1st Division, 12th Army Corps, Army of the Potomac
September 7-24 Maryland Campaign
September 16-17
Battle of Antietam

The regiment lost 5 killed, 42 seriously wounded and 17 missing. Colonel Hawley was shot in the neck, and Major Haldeman took command.

From the monument at the intersect of Starke Avenue and the Old Hagerstown Pike on the Antietam battlefield:

It was near this spot that the Regiment within six weeks after leaving home took an active part in this great battle.

From the War Department marker to Crawford’s Brigade on the Antietam battlefield:

Crawford’s Brigade advanced from Line’s farm at daybreak, on the right of Williams’ Division. The 124th Pennsylvania was detached and supported Magilton’s Brigade of Meade’s Division in its engagement on the north edge of the Cornfield. In its deployment the Brigade moved to the left in support of Ricketts’ Division, a part of which it relieved at this point, and occupied the northeast corner of the Cornfield and a part of the East Woods, where it was heavily engaged. Upon the turning of the Confederate flank by Greene’s Division, the 125th Pennsylvania advanced across the fields north of the Smoketown Road and penetrated the woods around the Dunkard Church. The Brigade supported Sedgwick’s Division in its advance and, later in the day, formed in support of the Sixth Corps.

September 18 Burying dead
September 19-20 March to Pleasant Valley, Md.
October At Maryland Heights; attached to 2nd Brigade, 1st Division, 12th Army Corps
October 30 At Loudon Heights
November 8-19 Reconnaissance up the Shenandoah Valley
November 20 Near Harper’s Ferry
December 10-15 March to Fredericksburg, Virginia, then to Fairfax Station
1863
January 20-24 Burnside’s 2nd Campaign, “Mud March,” attached to 2nd Brigade, 2nd Division, 12th Army Corps
February-April At Stafford Court House
April 27-May 6 Chancellorsville Campaign
May 1-5
Battle of Chancellorsville
Ordered to Harrisburg, Pa. to muster out
May 16 Mustered out