July 20, 1864. Geary´s 20th A.C. div. [Union] was massed on this ridge (Candy´s, Ireland´s & Jones´ brigades) in parallel lines on old Collier Rd., its front 400 yds. Eastward. A reconnoissance in force, there was no deployment & being several hundred yds. in advance of the other 2 divs., the position lacked support.
The surprise attack by O´Neal [Confederate] struck Geary´s right flank causing him to refuse his line on a left pivot down the slope to & beyond the deep revine northward, where it joined the left of Williams´ division on a ridge.
O´Neal´s assault & Scott´s [Confederate] attack at Collier´s Mill, were critical moments of the battle.
GHM 060-43 - Georgia Historical Commission - 1955
Plaque courtesy Lat34North.com.
Original page, with additional info, here.
Photo credit: Byron Hooks of Lat34North.com.