The marker for Howard’s Brigade of Sedgwick’s Division is on the east side of Maryland Route 65 north of Confederate Avenue. (Philadelphia Brigade Park tour map)

Howard's Brigade, Sedgwick's Division, marker 39 of the War Department Union markers at Antietam

From the marker:

U.S.A.
Second Army Corps

Howard’s Brigade, Sedgwick’s Division

Brig. Gen. O.O. Howard, Commanding.

Organization.
69th Pennsylvania Infantry
71st Pennsylvania Infantry
72nd Pennsylvania Infantry
106th Pennsylvania Infantry

September 17, 1862.


Howard’s Brigade, following Gorman and Dana in their attack, passed through the East Woods, crossed the Cornfield and the Hagerstown Pike and reached the edge of the West Woods, where its advance was checked about 90 yards east of this point.

Its left flank having been attacked and turned by McLaws’ and Walker’s Divisions, it was forced to retire to the fields north of D.R. Miller’s, where it was reformed and placed in position in support of a part of the Artillery of the First and Twelfth Coprs and of Sedgewick’s Division of the Second Corps.

No. 39.