The battle of Corinth developed a man--William S. Rosecrans--whose singular skill in planning the battle, and whose dauntless courage in riding between the firing-lines at the opportune moment, drew the country's attention almost as fully as Grant had done at Fort Donelson. And at this particular moment the West needed, or thought it needed, a man. The autumn months of 1862 had been spent by Generals Bragg and Buell in an exciting race across Kentucky, each at the head of a great army. Buell had saved Louisville from the legions of Bragg, and he had driven the Confederate Army of the Mississippi from the State; but he had not prevented his opponent from carrying away a vast amount of plunder, nor had he won decisive results at the battle of Perryville, which took place October 8, 1862, four days after the battle of Corinth. Thereupon the Federal authorities decided to relieve Buell of the Army of the Ohio and to give it to General Rosecrans. On October 30, 1862, Rosecrans assumed command at Nashville of this force, which was now designated as the Army of the Cumberland. Bragg had concentrated his army at Murfreesboro, in central Tennessee, about thirty miles southeast of Nashville and a mile east of a little tributary of the Cumberland River called Stone's River. Here occurred, two months later, the bloodiest single day's battle in the West, a conflict imminent as soon as the news came (on December 26th) that the Federals were advancing from Nashville. General Bragg did not lose a moment in marshaling his army into well-drawn battle-lines. His army was in two corps with a cavalry division under General Wheeler, Forrest and Morgan being on detached service. The left wing, under General Hardee, and the center, under Polk, were sent across Stone's River, the right wing, a division under John C. Breckinridge, remaining on the eastern side of the stream to guard the town. The line was three miles in length, and on December 30th the Federal host that had come from Nashville stood opposite, in a parallel line. It was also in three sections. The left wing, opposite Breckinridge, was commanded by Thomas L. Crittenden, whose brother was a commander in the Confederacy. They were sons of the famous United States senator from Kentucky, John J. Crittenden. The Federal center, opposite Polk, was commanded by George H. Thomas, and the right wing, opposing the Confederate left, was led by Alexander McD. McCook, one of the well-known "Fighting McCook" brothers. The effective Federal force was about forty-three thousand men; the Confederate army numbered about thirty-eight thousand. That night they bivouacked within musket range of each other and the camp-fires of each were clearly seen by the other as they shone through the cedar groves that interposed. Thus lay the two great armies, ready to spring upon each other in deadly combat with the coming of the morning.