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.

The advancing line of musketry-fire from Orchard Knoll disappeared to us behind a spar of the hill, and could no longer be seen; and it was not until night closed in that I knew that the troops in Chattanooga had swept across Missionary Ridge and broken the enemy's centre. Of course, the victory was won, and pursuit was the next step.

I ordered General Morgan L. Smith to feel to the tunnel, and it was found vacant, save by the dead and wounded of our own and the enemy commingled. The reserve of General Jeff. C. Davis was ordered to march at once by the pontoon-bridge across Chickamauga Creek, at its mouth, and push forward for the depot.

General Howard had reported to me in the early part of the day, with the remainder of his army corps (the Eleventh), and had been posted to connect my left with Chickamauga Creek. He was ordered to repair an old broken bridge about two miles up the Chickamauga, and to follow General Davis at 4 a.m., and the Fifteenth Army Corps was ordered to follow at daylight. But General Howard found that to repair the bridge was more of a task than was at first supposed, and we were all compelled to cross the Chickamauga on the new pontoon-bridge at its mouth. By about 11 a.m. General Jeff. C. Davis's division reached the depot, just in time to see it in flames. He found the enemy occupying two hills, partially intrenched, just beyond the depot. These he soon drove away. The depot presented a scene of desolation that war alone exhibits —corn-meal and corn in huge burning piles, broken wagons, abandoned caissons, two thirty-two-pounder rifled-guns with carriages burned, pieces of pontoons, balks and chesses, etc., destined doubtless for the famous invasion of Kentucky, and all manner of things, burning and broken. Still, the enemy kindly left us a good supply of forage for our horses, and meal, beans, etc., for our men.

Pausing but a short while, we passed on, the road filled with broken wagons and abandoned caissons, till night. Just as the head of the column emerged from a dark, miry swamp, we encountered the rear-guard of the retreating enemy. The fight was sharp, but the night closed in so dark that we could not move. General Grant came up to us there. At daylight we resumed the march, and at Graysville, where a good bridge spanned the Chickamauga, we found the corps of General Palmer on the south bank, who informed us that General Hooker was on a road still farther south, and we could hear his guns near Ringgold.

As the roads were filled with all the troops they could possibly accommodate, I turned to the east, to fulfill another part of the general plan, viz., to break up all communication between Bragg and Longstreet.

We had all sorts of rumors as to the latter, but it was manifest that we should interpose a proper force between these two armies. I therefore directed General Howard to move to Parker's Gap, and thence send rapidly a competent force to Red Clay, or the Council-Ground, there to destroy a large section of the railroad which connects Dalton and Cleveland. This work was most successfully and fully accomplished that day. The division of General Jeff. C. Davis was moved close up to Ringgold, to assist General Hooker if needed, and the Fifteenth Corps was held at Grayeville, for any thing that might turn up. About noon I had a message from General Hooker, saying he had had a pretty hard fight at the mountain-pass just beyond Ringgold, and he wanted me to come forward to turn the position. He was not aware at the time that Howard, by moving through Parker's Gap toward Red Clay, had already turned it. So I rode forward to Ringgold in person, and found the enemy had already fallen back to Tunnel Hill. He was already out of the valley of the Chickamauga, and on ground whence the waters flow to the Coosa. He was out of Tennessee.

I found General Grant at Ringgold, and, after some explanations as to breaking up the railroad from Ringgold back to the State line, as soon as some cars loaded with wounded men could be pushed back to Chickamauga depot, I was ordered to move slowly and leisurely back to Chattanooga.