This battle derives its name from Chickamauga Creek, which is but a few miles from Chattanooga, Tenn., and is considered one of the greatest battles of modern times. It was exceeded in our Civil war only by Gettysburg and the Wilderness; compares with Waterloo, and twice bloodier than Wagram or Austerlitz. General D. H. Hill said that he had never seen the Federal dead lie so thickly on the ground save in front of the sunken wall at Fredericksburg. The late General John B. Gordon, whose pen was never weary of writing the praises of the Confederate soldiers, said that in his opinion the battle of Chickamauga was even greater than that of Gettysburg, but it is thought that he was somewhat partial to Chickamauga, having been reared there, and when a boy fished in Chickamauga Creek, and had ridden behind his father over the country which was later made a great battlefield. General Braxton Bragg was in command of the Confederate army, known as the Army of the Tennessee, which was concentrated around Chattanooga. General Rosecrans was in command of the Federal army, known as the Army of the Cumberland. It was made up of three corps under Generals Crittenden, Thomas and McCook. They began to advance on Chattanooga and endanger Bragg's line of communication. On September 8th Bragg abandoned Chattanooga and fell back toward Rome, Ga. The Federals took possession of the city of Chattanooga. Rosecrans, believing that Bragg was in full retreat, ordered Crittenden to pursue. Meanwhile Bragg was concentrating his forces near Lafayette, about twenty-five miles from Chattanooga. He was joined by Generals S. B. Buckner and Breckinridge. General Longstreet was hastening from Virginia with about 12,000 men from Lee's army to join him, the men being fresh from the field of Gettysburg. Rosecrans' army was somewhat divided, as he was not expecting a general battle. Bragg was quick to grasp this opportunity of making a general assault on the Union forces while they were divided. The attack was made on the 13th of September by General Polk, but from some misapprehension of orders he did not move in time, and thus gave Rosecrans time to unite his forces, thus losing Bragg this opportunity of breaking up the Army of the Cumberland. The Federal forces under Crittenden now took position at Gordon's Mills, on the left bank of Chickamauga Creek, and the remainder of their troops were within supporting distance, and were under the command of Thomas and McCook, the total Union strength being estimated at about 60,000 men. The Confederate army lay on the east side of the stream, and was under the immediate command of Generals Polk, D. H. Hill and Buckner. On the 18th Longstreet arrived with his troops. Thus the two mighty armies were now face to face.