 Complete the following phrase:  On his return that fall, Stevenson reported to Braggs 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 Cheathams men were ultimately unable to stave off Joseph Hookers attacks on the mountain. At days 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. Breckinridges wing just before the 