days, Bragg attempted to launch several attacks on isolated parts of the Union army but each attempt failed. On the evening of September 18, Bragg concentrated the army near Chickamauga Creek; he thought that only part of the Union army was nearby but Rosecrans had concentrated his army faster than Bragg had expected.

During September 19 at Chickamauga, both sides fed in reinforcements as the day progressed. Longstreet arrived on the battlefield