It was at this time that I recommended to the general-in-chief the
movement against Mobile. I knew the peril the Army of the Cumberland
was in, being depleted continually, not only by ordinary casualties, but
also by having to detach troops to hold its constantly extending line
over which to draw supplies, while the enemy in front was as constantly
being strengthened. Mobile was important to the enemy, and in the
absence of a threatening force was guarded by little else than
artillery. If threatened by land and from the water at the same time
the prize would fall easily, or troops would have to be sent to its
defence. Those troops would necessarily come from Bragg. My judgment
was overruled, and the troops under my command were dissipated over
other parts of the country where it was thought they could render the
most service.

Soon it was discovered in Washington that Rosecrans was in trouble and
required assistance. The emergency was now too immediate to allow us to
give this assistance by making an attack in rear of Bragg upon Mobile.
It was therefore necessary to reinforce directly, and troops were sent
from every available point.

Rosecrans had very skilfully manoeuvred Bragg south of the Tennessee
River, and through and beyond Chattanooga. If he had stopped and
intrenched, and made himself strong there, all would have been right and
the mistake of not moving earlier partially compensated. But he pushed
on, with his forces very much scattered, until Bragg's troops from
Mississippi began to join him. Then Bragg took the initiative.
Rosecrans had to fall back in turn, and was able to get his army
together at Chickamauga, some miles south-east of Chattanooga, before
the main battle was brought on. The battle was fought on the 19th and
20th of September, and Rosecrans was badly defeated, with a heavy loss