The marker for Semmes’ Brigade of McLaw’s Division is on the west side of the Maryland Route 65 north of Confederate Avenue. (Hagerstown Pike tour map)

From the marker:

C.S.A.
Longstreet’s Command

Semmes’ Brigade, McLaw’s Division

Brig. Gen. Paul J. Semmes, Commanding.

Organization.
10th Georgia Infantry
53d Georgia Infantry
15th Virginia Infantry
32d Virginia Infantry

September 17, 1862.

Semmes Brigade reached the western suburbs of Sharpsburg at sunrise of the 17th and halted until nearly 9 A.M., when it advanced across the fields, in support of Stuart’s Cavalry, north and west of Hauser’s house. In the general advance of McLaws’ Division it was on the left of the line, and encountered the enemy in the northern part of the West Woods, forcing them to retire beyond the Nicodemus house.

Near this point its advance was checked by the Federal Artillery east of the Hagerstown Road. After severe losses it was withdrawn and placed as a reserve to Barksdale’s Brigade, in the western edge of the West Woods, where it remained until the night of the 18th when it recrossed the Potomac.

No. 359.