The two infantry divisions of the XII Corps, Cmdr. Maj. Gen. Joseph K. Mansfield, were not engaged in battle during Hooker’s attack. The two union divisions advanced across the Miller Farm, gained momentum and succeeded in pushing first Hood’s exhausted troops from the East Woods and Cornfield and then D. H. Hill Division to a bloody stalemate.  Major General Joseph Mansfield was mortally wounded in the chest and died the next day.

the War
Between
the States

Sharpsburg
Antietam

September 17^th, 1862

Gen. Mansfield XII Corps was located in the East Woods and launched his attack across the Miller Farm.

The confederates were located in this area, near the Dunker Church, looking across the Miller Farm to the east woods and the advance the Gen. Mansfield's  XII Corps.

The two divisions under Major General Mansfield gained ground from the East Woods, across the Miller Fields and to the location of Jackson’s high ground near the Dunker Church and at that location they came under fire from the woods and low on ammunition the attack of the XII Corps faltered.