Chattanooga Campaign
Reynolds was exchanged on October 13, 1863, and promoted to brigadier general to rank from September 14, 1863. Reynolds led a brigade in Maj. Gen. Simon Bolivar Buckner's division during the Chattanooga Campaign. After Confederate President Davis ordered Lt. Gen. James Longstreet to recapture Knoxville, Tennessee, Buckner's division was sent as a reinforcement. When the Union army attacked Bragg on 23 November, Reynolds' brigade was still waiting to board the trains that would take them to Knoxville. Detached from its parent division, Bragg sent it into the fight.