Finally, on June 23, 1863, Rosecrans left Murfreesboro, moving against Bragg at Tullahoma. By exercising very clever strategy in the form of a series of flanking movements, the Confederates were forced to give up one stronghold after another. The Confederates finally crossed the Tennessee River at Bridgeport and Caperton’s Ferry, Alabama, and moved directly into Chattanooga. The first arrival at Chattanooga was at the same hour that General Pickett made his famous charge at Gettysburg, namely near high noon on July 3rd. By this time the Union army had advanced to the western base of the Cumberland Mountain. The right of their line was at Winchester; the left at McMinnville. Rosecrans, with his headquarters at Winchester, was making preparations for another campaign for occupying Chattanooga. At this time Chattanooga was of utmost importance to both armies, and no doubt the largest prize from a military standpoint which the Army of the Cumberland ever contended for. The Confederates had destroyed the bridge across the Tennessee River at Bridgeport to delay the pursuit of the Union Army. The Union army consisted of three regular Army Corps; the 14th, commanded by Maj.-Gen. George H. Thomas; the 20th, commanded by Maj.-Gen. Alexander McCook, and the 21st, commanded by Maj.-Gen. Thomas L. Crittenden. The Cavalry Corps was commanded by Brig.-Gen. Robert Mitchell; the Reserve Corps was commanded by Maj.-Gen. Gordon Granger. The disposition of the Union forces was as follows: Thomas was posted at Decherd; McCook at McMinnville, and Crittenden at Winchester. Again Rosecrans was urged to renew hostilities against Bragg. The Cumberland, Raccoon and Lookout Mountain ranges and the Tennessee River were some of the giant obstacles between Rosecrans and Chattanooga. To cross these required a maximum of time and supplies as it was quite a task. There were railroads to repair; the river bridge to be rebuilt. All of this required time and labor. It was humanly impossible for Rosecrans to begin a forward movement at this time. By extending every effort possible, it was July 25th before the railroads were repaired. Another weighty consideration of Rosecrans was the necessary forage for the animals. Having knowledge that corn would not be ripe in east Tennessee and northern Alabama before the middle of August, Rosecrans insisted on waiting until that time before he launched another campaign. Officials of the War Department were eager for action on the part of Rosecrans.