crossed the Antietam during the night and lay in reserve a mile to the rear, was ordered up to support and relieve Hooker's troops.
Of this corps, the first division, under General Williams, took position on the right, and the second, under General Greene, on the left.
During the deployment, that veteran soldier, General Mansfield, fell mortally wounded.
The command of the corps fell to General Williams, and the division of the latter to General Crawford, who, with his own and Gordon's brigade, made an advance across the open field, and succeeded in seizing a point of woods on the west side of the Hagerstown road.
At the same time, Greene's division on the left was able to clear its front, and crossed into the left of the Dunker church.
Yet the tenure of these positions was attended with heavy loss; the troops, reduced to the attempt to hold their own, began to waver and break, and General Hooker was being carried from the field severely wounded, when, opportunely, towards nine o
ons of the First Corps, and by troops from the Twelfth Corps, brought up by General Williams.
It had been intended that Geary's division (with the exception of Greene's brigade) should also re-enforce the left; but this division missed its way. General Williams was temporarily in command of the Twelfth Corps, Slocum having charbeen taken from the Twelfth Corps to re-enforce the left during the operations of the afternoon, that there remained of this corps but a single brigade, under General Greene, drawn out in a thin line, with the division of Wadsworth on its left.
The brunt of the attack fell upon Greene, who, re-enforced by parts of Wadsworth's troGreene, who, re-enforced by parts of Wadsworth's troops, maintained his own position with great firmness, but Ewell's left penetrated without opposition the vacated breastworks on the furthest right, and this foothold within the Union lines he held during the night.
Thus closed the second day's action, and the result was such that the Confederate commander, believing he would be