The Battle of Chickamauga marked the end of Union Maj. Gen. William Rosencran's offensive into southwestern Tennessee and northwestern Georgia and the most significant Union defeat in the Western Theatre. More died here than in any other battle, save Gettysburg. After the battle Union forces retired to Chattanooga while Confederates besieged the city by occupying the surrounding heights. See acast.com/privacy for privacy and opt-out information.