Union Headquarters Markers
First Volunteer Brigade, Artillery Reserve 
Markers are located on Wheatfield Road (top right) and on Hancock
Avenue (bottom right). (See map)
From the Wheatfield Road monument:
Army of the Potomac
Artillery Reserve
First Volunteer Brigade
Lieut. Col. Freeman McGilvery
5th Mass. Battery E
(10th New York Battery Attached)
CaPart Charles Phillips
9th Mass. Battery
CaPart John Bigelow Lieut. Richard S. Milton
15th NewYork Battery
CaPart Patrick Hart
Penna. Batteries C and F
CaPart James Thompson
July 2. Went into action at 3.30 P. M. on this road Batteries C and F Penna. on the right in the Peach Orchard line facing west. About 5 P. M. opened and repulsed a heavy column of infantry charging the Brigade. About 6 P. M. the Confederates gained position on the left and the infantry fell back leaving the artillery without support. Four batteries fell back 250 yards and renewed their fire. Battery B 1st New Jersey and 15th New York Battery retired from the field. The advanced line of the 3rd Corps having been abandoned the Artillery Brigade took up a new position 400 yards in the rear and opened on the enemy with canister and at 8 P. M. retired to the battle line of the army.
From the Hancock Avenue marker:
Army of the Potomac
Artillery Reserve
First Volunteer Brigade
Lieut. Col. Freeman McGilvery
5th Mass. Battery E (10th New York Attached)
CaPart Charles A. Phillips
July 2. Engaged on Third Corps line on the Wheatfield Road.
9th Mass. Battery
CaPart John Bigelow Lieut. Richard S. Milton
July 2. Engaged on Third Corps line on the Wheatfield Road.
July 3. In Ziegler's Grove.
15th New York Battery
CaPart Patrick Hart
July 2. Engaged on Third Corps line on the Wheatfield Road.
July 3. On Second Corps line south of Pleasonton Avenue.
Penna. Batteries C and F
CaPart James Thompson
July 2. Engaged in Peach Orchard.
July 3. On line with Battery K 4th U. S. on right and Hart's Battery on left.
Casualties Killed 1 Officer 16 Men Wounded 10 Officers 61 Men Captured or Missing 5 Men Total 93
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