The first thing Grant tried to do was to clear out the Confederate lines which were nearest to ours on the plain south of Chattanooga, and to get hold of two bald knobs, or low hills, where Bragg's forces had their advance guard. As the entire field where this attack was to be made was distinctly visible from one of our forts, I went there on the 23d with the generals to watch the operations. The troops employed for the attack were under the immediate orders of Gordon Granger. There were some capital officers under Granger, among them Sheridan, Hazen, and T. J. Wood. Just before one o'clock the men moved out of their intrenchments, and remained in line for three quarters of an hour in full view of the enemy. The spectacle was one of singular magnificence.
Our point of view was Fort Wood. Usually in a battle one sees only a little corner of what is going on, the movements near where you happen to be; but in the battle of Chattanooga we had the whole scene before us. At last, everything being ready, Granger gave the order to advance, and three brigades of men pushed out simultaneously. The troops advanced rapidly, with all the precision of a review, the flags flying and the bands playing. The first sign of a battle one noticed was the fire spitting out of the rifles of the skirmishers. The lines moved steadily along, not halting at all, the skirmishers all the time advancing in front, firing and receiving fire.
The first shot was fired at two o'clock, and in five minutes Hazen's skirmishers were briskly engaged, while the artillery of Forts Wood and Thomas was opening upon the rebel rifle-pits and camps behind the line of fighting. The practice of our gunners was splendid, but it elicited no reply from the camps and batteries of the enemy, about a mile and three quarters distant; and it was soon evident that the Confederates had no heavy artillery, in that part of their lines at least. Our troops, rapidly advancing toward the knobs upon which they were directed, occupied them at twenty minutes past two. Ten minutes later Samuel Beatty, who commanded a brigade, driving forward across an open field, carried the rifle-pits in his front, the occupants fleeing as they fired their last volley; and Sheridan, moving through the forest which stretched before him, drove in the enemy's pickets. Sheridan halted his advance, in obedience to orders, on reaching the rifle-pits, where the rebel force was waiting for his attack. No such attack was made, however, the design being to secure only the height. The entire movement was carried out in such an incredibly short time that at half past three I was able to send a telegram to Mr. Stanton describing the victory.
We took about two hundred prisoners, mostly Alabama troops, and had gained a position which would be of great importance should the enemy still attempt to hold the Chattanooga Valley. With these heights in our possession, a column marching to turn Missionary Ridge was secure from flank attack. The Confederates fired three small guns only during the affair, and that tended to confirm the impression that they had withdrawn their main force. About four o'clock in the afternoon the enemy opened fire from the top of Missionary Ridge, the total number of cannon they displayed being about twelve, but nothing was developed to show decisively whether they would fight or flee. Grant thought the latter; other judicious officers the former.
That evening I left Chattanooga to join General Sherman, who had his troops north of the river concealed behind the hills, and ready to attempt to cross the Tennessee that very night, so as to be able to attack the east head of Missionary Ridge on the night of the 24th or the morning of the 25th.
Sherman had some twenty-five thousand men, and crossing them over a river as wide and rapid as the Tennessee was above Chattanooga seemed to me a serious task, and I watched the operations of the night with great curiosity. The first point was to get a sufficient body of troops on the south bank to hold a position against the enemy (the Confederates had pickets for a long distance up and down the Tennessee, above Chattanooga), and then from there commence building the pontoon bridge by which the bulk of the men were to be got over.
About one o'clock in the morning the pontoon boats, which had been sent up the river some distance, were filled with men and allowed to drop down to the point General Sherman had chosen for the south end of his bridge. They landed about 2.30 in the morning, seized the pickets, and immediately began to fortify their position. The boats in the meantime were sent across the river to bring over fresh loads of men. They kept this up until morning. Then a small steamer which Sherman had got hold of came up and began to bring over troops. At daybreak some of the boats were taken from the ferrying and a bridge was begun. It was marvelous with what vigor the work went on. Sherman told me he had never seen anything done so quietly and so well, and he declared later in his report that he did not believe the history of war could show a bridge of that length—about thirteen hundred and fifty feet—laid down so noiselessly and in so short a time. By one o'clock in the afternoon (November 24th) the bridge was done, and the balance of his forces were soon marching briskly across. As soon as Sherman saw that the crossing was insured, he set the foremost of his column in motion for the head of Missionary Ridge. By four o'clock he had gained the crest of the ridge and was preparing for the next day's battle.
As soon as I saw Sherman in position, I hurried back to Chattanooga. I reached there just in time to see the famous moonlight battle on Lookout Mountain. The way this night battle happened to be fought was that Hooker, who had been holding Lookout Valley, had been ordered to gain a foothold on Lookout Mountain if possible, and that day, while I was with Sherman, had really succeeded in scaling the side of the mountain. But his possession of the point he had reached had been so hotly disputed that a brigade had been sent from Chattanooga to aid him. These troops attacked the Confederate lines on the eastern slope of the mountain about eight o'clock that evening. A full moon made the battlefield as plain to us in the valley as if it were day, the blaze of their camp fires and the flashes of their guns displaying brilliantly their position and the progress of their advance. No report of the result was received that night, but the next morning we knew that Bragg had evacuated Lookout Mountain the night before, and that our troops occupied it.
After the successes of the two days a decisive battle seemed inevitable, and orders were given that night for a vigorous attack the next morning. I was up early, sending my first dispatch to Mr. Stanton at half past seven o'clock. As the result of the operations of the day before, Grant held the point of Lookout Mountain on the southwest and the crest of the east end of Missionary Ridge, and his line was continuous between these points. As the result of the movement on November 23d, our lines in front had been advanced to Orchard Knob. The bulk of the Confederate force was intrenched along Missionary Ridge, five to six hundred feet above us, and facing our center and left. From Chattanooga we could see the full length of our own and the enemy's lines spread out like a scene in a theater.