In the morning, elements of the Union Army of the Tennessee commanded by Maj. Gen. William Tecumseh Sherman attempted to capture the northern end of Missionary Ridge, Tunnel Hill, but were stopped by fierce resistance from the Confederate divisions of Maj. Gen. Patrick Cleburne, William H.T. Walker, and Carter L. Stevenson. In the afternoon, Grant was concerned that Bragg was reinforcing his right flank at Sherman's expense. He ordered the Army of the Cumberland, commanded by Maj. Gen. George Henry Thomas, to move forward and seize the Confederate line of rifle pits on the valley floor, and stop there to await further orders. The Union soldiers moved forward and quickly pushed the Confederates from the first line of rifle pits, but were then subjected to a punishing fire from the Confederate lines up the ridge.