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 north-west 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.