The Army of the Cumberland recovered from the shock of Stones River and prepared for its summer offensive against Confederate General Braxton Bragg. Sheridan's division participated in the advance against Bragg in Rosecrans's brilliant Tullahoma Campaign, and was the lead division to enter the town of Tullahoma. On the second day of the Battle of Chickamauga, September 20, 1863, Rosecrans was shifting Sheridan's division behind the Union battle line when Bragg launched an attack into a gap in the Union line. Sheridan's division made a gallant stand on Lytle Hill against an attack by the Confederate corps of Lt. Gen. James Longstreet, but was swamped by retreating Union soldiers. The Confederates drove Sheridan's division from the field in confusion. He gathered as many men as he could and withdrew toward Chattanooga, rallying troops along the way. Learning of Maj. Gen. George H. Thomas's XIV Corps stand on Snodgrass Hill, Sheridan ordered his division back to the fighting, but they took a circuitous route and did not participate in the fighting as some histories claim. His return to the battlefield ensured that he did not suffer the fate of Rosecrans who rode off to Chattanooga leaving the army to its fate, and was soon relieved of command.