Forrest served with the main army at the Battle of Chickamauga on September 18–20, 1863, in which he pursued the retreating Union army and took hundreds of prisoners. Like several others under Bragg's command, he urged an immediate follow-up attack to recapture Chattanooga, which had fallen a few weeks before. Bragg failed to do so, upon which Forrest was quoted as saying, "What does he fight battles for?" The story that Forrest confronted and threatened the life of Bragg in the fall of 1863, following the battle of Chickamauga, and that Bragg transferred Forrest to command in Mississippi as a direct result, is now considered to be apocryphal.