On September 19-20, 1863, Braxton Bragg’s Army of Tennessee defeated a Union force commanded by General William Rosecrans in the Battle of Chickamauga, during the American Civil War. After Rosecrans’ troops pushed the Confederates out of Chattanooga early that month, Bragg called for reinforcements and launched a counterattack on the banks of nearby Chickamauga Creek. Over two days of battle, the rebels forced Rosecrans to give way, with heavy losses on both sides. Bragg failed to press his advantage after the victory, however, allowing the Federals to safely reach Chattanooga. Ulysses S. Grant soon arrived with reinforcements, allowing the Union to reverse the results of Chickamauga and score a lasting victory in the region that November.