He was in a position threatening Knoxville, and at the same time where he could be brought back speedily to Chattanooga.

The day after Longstreet left Loudon, Sherman reached Bridgeport in person and proceeded on to see me that evening, the 14th, and reached Chattanooga the next day.
My orders for battle were all prepared in advance of Sherman's arrival (*15), except the dates, which could not be fixed while troops to be engaged were so far away.

The possession of Lookout Mountain was of no special advantage to us now.

Hooker was instructed to send Howard's corps to the north side of the Tennessee, thence up behind the hills on the north side, and to go into camp opposite Chattanooga; with the remainder of the command, Hooker was, at a time to be afterwards appointed, to ascend the western slope between the upper and lower palisades, and so get into Chattanooga valley.
The plan of battle was for Sherman to attack the enemy's right flank, form a line across it, extend our left over South Chickamauga River so as to threaten or hold the railroad in Bragg's rear, and thus force him either to weaken his lines elsewhere or lose his connection with his base at Chickamauga Station.

Hooker was to perform like service on our right.