_Reinforcements for the Besieged Army_ As early as September 13, General in Chief Halleck ordered reinforcements sent to Rosecrans. His dispatches on September 13, 14, and 15 to Major Generals Hurlbut at Memphis and Grant and Sherman at Vicksburg directed the troop movements. These dispatches, however, were delayed for several days en route from Cairo to Memphis and, in the meantime, the Battle of Chickamauga was fought. Grant received the orders on the 22nd and immediately instructed four divisions under Sherman to march to Chattanooga. One division of the Seventeenth Corps, already in transit from Vicksburg to Helena, Ark., was ordered to proceed on to Memphis. General Sherman quickly brought three divisions of his Fifteenth Army Corps from the vicinity of the Big Black River into Vicksburg, where they embarked as fast as water transportation could be provided. By October 3, all of the movement of 17,000 men was under way. The route of travel was by boat to Memphis, then by railroad and overland marches to Chattanooga. From Memphis the troops followed closely the Memphis and Charleston Railroad, which Sherman was ordered to repair as he advanced. By November 15, the troops were at Bridgeport, Ala., having traveled a distance of 675 miles. When the War Department in Washington received word that the Army of the Cumberland was besieged in Chattanooga, it considered the situation so critical that President Lincoln was called out of bed late at night to attend a council meeting. This meeting occurred on the night of September 23, and is described by Nicolay and Hay: Immediately on receipt of Rosecrans’ dispatch, Mr. Stanton sent one of the President’s secretaries who was standing by to the Soldier’s Home, where the President was sleeping. A little startled by the unwonted summons,—for this was “the first time” he said, Stanton had ever sent for him,—the President mounted his horse and rode in through the moonlight to the War Department to preside over an improvised council to consider the subject of reinforcing Rosecrans. There were present General Halleck, Stanton, Seward and Chase of the Cabinet; P. H. Watson and James A. Hardie of the War Department, and General D. C. McCallum, Superintendent of Military Transportation. After a brief debate, it was resolved to detach the Eleventh and Twelfth Corps from the Army of the Potomac, General Hooker to be placed in command of both.... [Illustration: ROUTE OF UNION REINFORCEMENTS MOVEMENTS, SEPT. 22-OCT. 15, 1863] [Illustration: _Chattanooga headquarters of General Rosecrans during the siege._ Courtesy National Archives.]