The marker for Greene’s Division of the Twelfth Army Corps is on the west side of Smoketown Road at Mansfield Road. (Smoketown Road tour map) This is the first of three markers for Greene’s Division. The next continues the story on Cornfield Road, while the last is across from the Dunker Church. 

From the marker:

U.S.A.

Greene’s Division, Twelfth Army Corps

Brig. Gen. George S. Greene, Commanding.

September 17, 1862.

Greene’s Division crossed the Antietam by the Upper Bridge about midnight of the 16th and bivouacked on the Hoffman farm.

On the morning of the 17th, it followed Williams Division west of this road, and formed line about 8 A. M. a short distance northwest of this point. The Division then advanced in line of battle, Tyndale on the right and Stainrook on the left of this road, and relieved the left of Crawford’s Brigade of the Twelfth Corps.

In this advance the Division encountered the right flank of the Confederate line in the East Woods, turned it after a short and severe contest and moving obliquely to the left crossed the Smoketown Road and followed in pursuit to the ridge, on Mumma’s farm, opposite the Dunkard Church.

No. 48.