All in Chattanooga were impatient for action, rendered almost acute by the natural apprehensions felt for the safety of General Burnside in East Tennessee.

My command had marched from Memphis, three hundred and thirty miles, and I had pushed them as fast as the roads and distance would admit, but I saw enough of the condition of men and animals in Chattanooga to inspire me with renewed energy. I immediately ordered my leading division (General Ewing's) to march via Shellmound to Trenton, demonstrating against Lookout Ridge, but to be prepared to turn quickly and follow me to Chattanooga and in person I returned to Bridgeport, rowing a boat down the Tennessee from Belly's Ferry, and immediately on arrival put in motion my divisions in the order in which they had arrived. The bridge of boats at Bridgeport was frail, and, though used day and night, our passage was slow; and the road thence to Chattanooga was dreadfully cut up and encumbered with the wagons of the other troops stationed along the road. I reached General Hooker's headquarters during a rain, in the afternoon of the 20th, and met General Grant's orders for the general attack on the next day. It was simply impossible for me to fulfill my part in time; only one division (General John E. Smith's) was in position. General Ewing was still at Trenton, and the other two were toiling along the terrible road from Shellmound to Chattanooga. No troops ever were or could be in better condition than mine, or who labored harder to fulfill their part. On a proper representation, General Grant postponed the attack. On the 21st I got the Second Division over Brown's-Ferry Bridge, and General Ewing got up; but the bridge broke repeatedly, and delays occurred which no human sagacity could prevent. All labored night and day, and General Ewing got over on the 23d; but my rear division was cut off by the broken bridge at Brown's Ferry, and could not join me. I offered to go into action with my three divisions, supported by General Jeff. C. Davis, leaving one of my best divisions (Osterhaus's) to act with General Hooker against Lookout Mountain. That division has not joined me yet, but I know and feel that it has served the country well, and that it has reflected honor on the Fifteenth Army Corps and the Army of the Tennessee. I leave the record of its history to General Hooker, or whomsoever has had its services during the late memorable events, confident that all will do it merited honor.

At last, on the 28d of November, my three divisions lay behind the hills opposite the mouth of the Chickamauga. I dispatched the brigade of the Second Division, commanded by General Giles A. Smith, under cover of the hills, to North Chickamauga Creek, to man the boats designed for the pontoon-bridge, with orders (at midnight) to drop down silently to a point above the mouth of the South Chickamauga, there land two regiments, who were to move along the river-bank quietly, and capture the enemy's river-pickets.

General Giles A. Smith then was to drop rapidly below the month of the Chickamauga, disembark the rest of his brigade, and dispatch the boats across for fresh loads. These orders were skillfully executed, and every rebel picket but one was captured. The balance of General Morgan L. Smith's division was then rapidly ferried across; that of General John E. Smith followed, and by daylight of November 24th two divisions of about eight thousand men were on the east bank of the Tennessee, and had thrown up a very respectable rifle-trench as a tete du pont. As soon as the day dawned, some of the boats were taken from the use of ferrying, and a pontoon-bridge was begun, under the immediate direction of Captain Dresser, the whole planned and supervised by General William F. Smith in person. A pontoon-bridge was also built at the same time over Chickamanga Creek, near its mouth, giving communication with the two regiments which had been left on the north side, and fulfilling a most important purpose at a later stage of the drama. I will here bear my willing testimony to the completeness of this whole business. All the officers charged with the work were present, and manifested a skill which I cannot praise too highly. I have never beheld any work done so quietly, so well; and I doubt if the history of war can show a bridge of that extent (viz., thirteen hundred and fifty feet) laid so noiselessly and well, in so short a time. I attribute it to the genius and intelligence of General William F. Smith. The steamer Dunbar arrived up in the course of the morning, and relieved Ewing's division of the labor of rowing across; but by noon the pontoon-bridge was done, and my three divisions were across, with men, horses, artillery, and every thing.

General Jeff. C. Davis's division was ready to take the bridge, and I ordered the columns to form in order to carry the Missionary Hills. The movement had been carefully explained to all division commanders, and at 1 p.m. we marched from the river in three columns in echelon: the left, General Morgan L. Smith, the column of direction, following substantially Chickamauga Creek; the centre, General, John E. Smith, in columns, doubled on the centre, at one brigade interval to the right and rear; the right, General Ewing, in column at the same distance to the right rear, prepared to deploy to the right, on the supposition that we would meet an enemy in that direction. Each head of column was covered by a good line of skirmishers, with supports. A light drizzling rain prevailed, and the clouds hung low, cloaking our movement from the enemy's tower of observation on Lookout Mountain. We soon gained the foothills; our skirmishers crept up the face of the hills, followed by their supports, and at 3.30 p.m. we had gained, with no loss, the desired point. A brigade of each division was pushed rapidly to the top of the hill, and the enemy for the first time seemed to realize the movement, but too late, for we were in possession. He opened with artillery, but General Ewing soon got some of Captain Richardson's guns up that steep hill and gave back artillery, and the enemy's skirmishers made one or two ineffectual dashes at General Lightburn, who had swept round and got a farther hill, which was the real continuation of the ridge. From studying all the maps, I had inferred that Missionary Ridge was a continuous hill; but we found ourselves on two high points, with a deep depression between us and the one immediately over the tunnel, which was my chief objective point. The ground we had gained, however, was so important, that I could leave nothing to chance, and ordered it to be fortified during the night. One brigade of each division was left on the hill, one of General Morgan L. Smith's closed the gap to Chickamauga Creek, two of General John E. Smith's were drawn back to the base in reserve, and General Ewing's right was extended down into the plain, thus crossing the ridge in a general line, facing southeast.

The enemy felt our left flank about 4 p.m., and a pretty smart engagement with artillery and muskets ensued, when he drew off; but it cost us dear, for General Giles A. Smith was severely wounded, and had to go to the rear; and the command of the brigade devolved on Colonel Topper (One Hundred and Sixteenth Illinois), who managed it with skill during the rest of the operations. At the moment of my crossing the bridge, General Howard appeared, having come with three regiments from Chattanooga, along the east bank of the Tennessee, connecting my new position with that of the main army in Chattanooga. He left the three regiments attached temporarily to Gen. Ewing's right, and returned to his own corps at Chattanooga. As night closed in, I ordered General Jeff. C. Davis to keep one of his brigades at the bridge, one close up to my position, and one intermediate. Thus we passed the night, heavy details being kept busy at work on the intrenchments on the hill. During the night the sky cleared away bright, a cold frost filled the air, and our camp-fires revealed to the enemy and to our friends in Chattanooga our position on Missionary Ridge. About midnight I received, at the hands of Major Rowley (of General Grant's staff), orders to attack the enemy at "dawn of day," with notice that General Thomas would attack in force early in the day. Accordingly, before day I was in the saddle, attended by all my staff; rode to the extreme left of our position near Chickamauga Creek; thence up the hill, held by General Lightburn; and round to the extreme right of General Ewing.

Catching as accurate an idea of the ground as possible by the dim light of morning, I saw that our line of attack was in the direction of Missionary Ridge, with wings supporting on either flank. Quite a valley lay between us and the next hill of the series, and this hill presented steep sides, the one to the west partially cleared, but the other covered with the native forest. The crest of the ridge was narrow and wooded. The farther point of this hill was held-by the enemy with a breastwork of logs and fresh earth, filled with men and two guns. The enemy was also seen in great force on a still higher hill beyond the tunnel, from which he had a fine plunging fire on the hill in dispute. The gorge between, through which several roads and the railroad-tunnel pass, could not be seen from our position, but formed the natural place d'armes, where the enemy covered his masses to resist our contemplated movement of turning his right flank and endangering his communications with his depot at Chickamauga Station.

As soon as possible, the following dispositions were made: The brigades of Colonels Cockrell and Alexander, and General Lightburn, were to hold our hill as the key-point. General Corse, with as much of his brigade as could operate along the narrow ridge, was to attack from our right centre. General Lightburn was to dispatch a good regiment from his position to cooperate with General Corse; and General Morgan L. Smith was to move along the east base of Missionary Ridge, connecting with General Corse; and Colonel Loomis, in like manner, to move along the west bank, supported by the two reserve brigades of General John E. Smith.

The sun had hardly risen before General Corse had completed his preparations and his bugle sounded the "forward!" The Fortieth Illinois, supported by the Forty-sixth Ohio, on our right centre, with the Thirtieth Ohio (Colonel Jones), moved down the face of our hill, and up that held by the enemy. The line advanced to within about eighty yards of the intrenched position, where General Corse found a secondary crest, which he gained and held. To this point he called his reserves, and asked for reenforcements, which were sent; but the space was narrow, and it was not well to crowd the men, as the enemy's artillery and musketry fire swept the approach to his position, giving him great advantage. As soon as General Corse had made his preparations, he assaulted, and a close, severe contest ensued, which lasted more than an hour, gaining and losing ground, but never the position first obtained, from which the enemy in vain attempted to drive him. General Morgan L. Smith kept gaining ground on the left spurs of Missionary Ridge, and Colonel Loomis got abreast of the tunnel and railroad embankment on his aide, drawing the enemy's fire, and to that extent relieving the assaulting party on the hill-crest. Captain Callender had four of his guns on General Ewing's hill, and Captain Woods his Napoleon battery on General Lightburn's; also, two guns of Dillon's battery were with Colonel Alexander's brigade. All directed their fire as carefully as possible, to clear the hill to our front, without endangering our own men. The fight raged furiously about 10 a.m., when General Corse received a severe wound, was brought off the field, and the command of the brigade and of the assault at that key-point devolved on that fine young, gallant officer, Colonel Walcutt, of the Forty-sixth Ohio, who fulfilled his part manfully. He continued the contest, pressing forward at all points. Colonel Loomis had made good progress to the right, and about 2 p.m., General John E. Smith, judging the battle to be most severe on the hill, and being required to support General Ewing, ordered up Colonel Raum's and General Matthias's brigades across the field to the summit that was being fought for. They moved up under a heavy fire of cannon and musketry, and joined Colonel Walcutt; but the crest was so narrow that they necessarily occupied the west face of the hill. The enemy, at the time being massed in great strength in the tunnel-gorge, moved a large force under cover of the ground and the thick bushes, and suddenly appeared on the right rear of this command. The suddenness of the attack disconcerted the men, exposed as they were in the open field; they fell back in some disorder to the lower edge of the field, and reformed. These two brigades were in the nature of supports, and did not constitute a part of the real attack.

The movement, seen from Chattanooga (five miles off ) with spy-glasses, gave rise to the report, which even General Meiga has repeated, that we were repulsed on the left. It was not so. The real attacking columns of General Corse, Colonel Loomis, and General Smith, were not repulsed. They engaged in a close struggle all day persistently, stubbornly, and well. When the two reserve brigades of General John E. Smith fell back as described, the enemy made a show of pursuit, but were in their turn caught in flank by the well-directed fire of our brigade on the wooded crest, and hastily sought cover behind the hill. Thus matters stood about 3 p.m. The day was bright and clear, and the amphitheatre of Chattanooga sat in beauty at our feet. I had watched for the attack of General Thomas "early in the day." Column after column of the enemy was streaming toward me; gun after gun poured its concentric shot on us, from every hill and spur that gave a view of any part of the ground held by us. An occasional shot from Fort Wood and Orchard Knob, and some musketry-fire and artillery over about Lookout Mountain, was all that I could detect on our side; but about 3 p.m. I noticed the white line of musketry-fire in front of Orchard Knoll extending farther and farther right and left and on. We could only hear a faint echo of sound, but enough was seen to satisfy me that General Thomas was at last moving on the centre. I knew that our attack had drawn vast masses of the enemy to our flank, and felt sure of the result. Some guns which had been firing on us all day were silent, or were turned in a different direction.