On his return that fall, Stevenson reported to Bragg's Army of Tennessee at Chattanooga, Tennessee, where Bragg assigned Stevenson overall command of the Confederate left flank atop Lookout Mountain. During the Battles for Chattanooga, Stevenson and Benjamin Cheatham's men were ultimately unable to stave off Joseph Hooker's attacks on the mountain. At day's end, Stevenson decided to withdraw his force from the mountain, their movements screened by the darkness of a lunar eclipse. His men joined the left of John C. Breckinridge's wing just before the Battle of Missionary Ridge. Bragg retreated to Dalton, Georgia, effectively ending the campaign, and offered his resignation. President Davis replaced Bragg with Joseph E. Johnston.