...nd Louisville Railway a large force destined to break the Confederate line. He had under his command 114,000 men, arranged in four columns, commanded respectively by Brig.-Gens. A. McDowell McCook, O. M. Mitchel , G. H. Thomas, and T. L. Crittenden, acting as major-generals, and aided by twenty brigade commanders. These troops were from States northward of the Ohio, and loyalists of Kentucky and Tennessee....