With the successful seizure of Brown’s Ferry and construction of a pontoon bridge across the Tennessee River there, and Hooker’s equally successful advance from Bridgeport and seizure of the south side of the river at Raccoon Mountain and in Lookout Valley, the way was finally clear for the Union Army to reopen a short line of supply and communication between Chattanooga and Bridgeport, the rail end of its supply line. This “Cracker Line” ran by boat up the Tennessee River from Bridgeport to Kelley’s Ferry. Above Kelley’s Ferry, the swift current made the stream unnavigable at certain points to boats then available. Accordingly, at Kelley’s Ferry, the “Cracker Line” left the river and crossed Raccoon Mountain by road to Brown’s Ferry. There it crossed the river on the pontoon bridge, thence across Moccasin Point, and finally across the river once more into Chattanooga. Early in November, Bragg ordered Longstreet to march against Burnside in East Tennessee with Maj. Gen. Lafayette McLaw’s and Maj. Gen. John B. Hood’s Divisions of infantry, Col. E. Porter Alexander’s and Maj. A. Leyden’s battalions of artillery, and five brigades of cavalry under Maj. Gen. Joseph Wheeler—about 15,000 men in all. This movement caused great anxiety in Washington and the authorities urged Grant to act promptly to assist Burnside. Grant felt that the quickest way to aid him was to attack Bragg and force the latter to recall Longstreet. On November 7, Thomas received Grant’s order to attack Bragg’s right. Thomas replied that he was unable to move a single piece of artillery because of the poor condition of the horses and mules. They were not strong enough to pull artillery pieces. In these circumstances, Grant could only answer Washington dispatches, urge Sherman forward, and encourage Burnside to hold on. _Lifting the Siege—The Battle of Chattanooga_ (See map on pages 36-37.) With the Confederate Army in front of Chattanooga divided into two corps, Hardee on the right and Breckinridge on the left on Missionary Ridge, and General Stevenson with a small force occupying Lookout Mountain, Bragg waited.