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and thence over the mountains toward
Trenton, some distance up the
Lookout Valley, to menace
Bragg's left front, while the remainder of
Sherman's force, excepting
Osterhaus's division, moved up quickly and secretly to Brown's Ferry, crossed the river there on
Smith's pontoon bridge, and marched round behind
Chattanooga toward
Grant's left, thereby giving
Bragg the impression that they were more likely to be moving to the relief of
Burnside than to attack his extreme right.
The latter was the real movement intended.
These troops, as we shall observe presently, crossed the
Tennessee to
Chattanooga, and at a proper time took position on
Thomas's left.
Ewing's troops were stealthily withdrawn from near
Trenton, and ordered to follow the others of the corps to the extreme left of the
Union Army, leaving only
Hooker, with the addition of
Osterhaus's division, on
Bragg's left.
The latter had been prevented from crossing the river at Brown's Ferry, on account of the breaking of the pontoon bridge by drift-wood, and was ordered to join
Hooker.
On account of bad roads, caused by heavy rains,
Ewing's march was more tardy than was contemplated, and he did not reach his assigned position until the 23d, instead of on the 21st, when
Grant expected to make his attack.
The latter was impatient, for he knew that
Burnside was in peril; and by a note from
Bragg on the 20th,
1 and the report of a Confederate deserter on the 22d, he was impressed with a belief that his adversary was preparing to fly southward.
Bragg was simply repeating the trick he so successfully played upon
Rosecrans, to draw
Grant into action prematurely, before his re-enforcements should arrive.
It succeeded in a degree, for before
Sherman's troops had crossed the river, he ordered
Thomas to move the center forward to find out what was going on behind the strong line of Confederate pickets in front of
Chattanooga.
The fact was,
Bragg, instead of preparing to retreat, was making dispositions for a formidable resistance to the impending attack.
In the arrangement for the attack on the 21st,
Hooker was to assail
Bragg's left on
Lookout Mountain.
This movement was suspended, and
Howard's corps was called to
Chattanooga and temporarily attached to
Thomas's command.
The Fifteenth Army Corps (
Sherman's) was now under the command of
General Blair, with orders to take position on the extreme left, near the mouth of the West Chickamauga River.
They had with them on their march up the north side of the
Tennessee, a concealed train of one hundred and sixteen pontoon boats, wherewith to construct a bridge for passing over; and on the afternoon of the 23d, when
Thomas moved out, they were at the crossing point.
When
Thomas moved, the heavy guns of
Fort Wood, at
Chattanooga, were playing upon the
Missionaries' Ridge and
Orchard Knob,
2 the latter a much lower hill considerably in front of the former.
The column