On the north end of the battlefield Mansfield’s 12th Corps moved up to support the early morning attack by Hooker’s 1st Corps. It had barely moved to within long range of the Confederate skirmishers and began forming line of battle when Mansfield, concerned that his men were firing on friendly troops, was shot from his horse, one of six generals who would be killed or mortally wounded in the course of the day.

First Division commander Alpheus Williams took over the corps and led it forward, chasing the Confederate skirmishers out of the East Woods and advancing southwest across the Miller and Mumma farms. The Twelfth Corps remained on the field to the end of the day supporting the northern flank of the Union line.

Click on the map or select from the menu below to see the page for any monument or marker:

monuments
Major General Joseph Mansfield
Mansfield mortuary cannon
12th Pennsylvania Volunteer Cavalry Regiment

markers
12th Corps (6 a.m.)
12th Corps (2 markers)
Crawford’s Brigade
Greene’s Division
Rickett’s Division
Seymour’s Bivouac
Seymour’s Brigade
Stainrook’s Brigade
Tyndale’s Brigade