During the night of the 19th, Buell’s and Harker’s brigades (Wagner’s brigade garrisoning Chattanooga) were withdrawn
from near Viniard’s to the slope of Missionary Ridge west of Dyer’s House and beyond the Crawfish Springs Road. Early in the morning Wood was directed to relieve Negley’s troops on this ground. This was not accomplished until after 9:30, when the last of Negley’s
troops passed to the left and Wood’s line with Barnes’ Brigade of VanCleve’s Division which had come forward with Wood, was closed to the left on Brannan’s Division upon the supposition that Brannan had responded to an order sent him to move to the support
of the left. Wood was ordered at 10:45 A. M. by Gen. Rosecrans to close rapidly on Reynolds and support him. Brannan being under attack at the moment of receiving the order, held his line. Wood obeying literally, drew out of line and moved to the rear of Brannan
toward Reynolds. Barnes Brigade at the beginning of the movement was dispatched to Baird’s support on the extreme left. Just as Harker’s Brigade, moving next in rear of Barnes, had gained the rear of Brannan, Longstreet moved with a column of three divisions
of eight brigades upon Wood’s late front at the Brotherton house, penetrating the line dispersing Buell’s brigade which was following Harker, and taking Brannan’s line in reverse. Harker’s Brigade promptly moved back into the Dyer field, attacked the head
of the enemy’s column with great vigor, which gave Brannan a chance to rally his command on Snodgrass Hill, where Harker soon joined him and held the left of the line on that part of the field until night. Fragments of Buell’s Brigade rallied on Snodgrass
Hill, where Gen. Wood in person established his headquarters, in co-operated with Gen Brannan in the defense of the position. The loss of the division (two brigades) for two days was: killed, 132; wounded, 744; missing, 194; total, 1,070.