town, and the last forty-two miles from the first. Beyond Lookout Mountain several minor ridges follow the same general course a little east of north. The nearest to it is Missionary Ridge, and, next to this, Pigeon Mountain. Between Lookout Mountain and Missionary Ridge flows Chattanooga Creek, and between Missionary Ridge and Pigeon Mountain the West Branch of Chickamauga Creek. These are tributaries of the Tennessee, which they enter respectively below and above Chattanooga. The valley of the West Chickamauga bears the name of McLemore's Cove. Pigeon Mountain is separated by Pea Vine Creek from Chickamauga Hills, the next minor ridge. Between this and Taylor's Ridge runs Middle Chickamauga Creek, which, dividing, flows along the western base of the latter ridge as East Chickamauga Creek. This whole region of mountains and valleys was then covered with a dense growth of timber and underbrush, with the exception of clearings here and there for farming purposes. The roads leading over the minor ridges were as steep and rough as those over the higher ones.
The passage over the river being effected, and Bragg's army apparently waiting to be attacked in its position about Chattanooga, Rosecrans had to decide between taking the direct offensive against the enemy and a repetition of his Tullahoma plan — that is, to compel Bragg's withdrawal from Chattanooga by a flanking movement against his communications. The great natural obstacles in the way of the former stamped it as a very rash venture to seek the rebels on their chosen fortified ground, and hence the Commander-in-chief once more resolved upon turning operations. He set his troops in motion from the south bank without delay, with McCook again on the right, Thomas in the centre, Crittenden on the left, and Granger in reserve. The general object was to reach and hold or destroy the main rebel line of supply formed by the Atlanta & Chattanooga and East Tennessee & Georgia Railroads, both north and south of their junction at Dalton, Georgia, and thereby also cut all the enemy's lines of retreat in a southward direction.
