Southern States. A railroad also starts from the opposite side of the
river, extending west as far as Shreveport, Louisiana. Vicksburg was
the only channel, at the time of the events of which this chapter
treats, connecting the parts of the Confederacy divided by the
Mississippi. So long as it was held by the enemy, the free navigation
of the river was prevented. Hence its importance. Points on the river
between Vicksburg and Port Hudson were held as dependencies; but their
fall was sure to follow the capture of the former place.

The campaign against Vicksburg commenced on the 2d of November as
indicated in a dispatch to the general-in-chief in the following words:
"I have commenced a movement on Grand Junction, with three divisions
from Corinth and two from Bolivar. Will leave here [Jackson, Tennessee]
to-morrow, and take command in person. If found practicable, I will go
to Holly Springs, and, may be, Grenada, completing railroad and
telegraph as I go."

At this time my command was holding the Mobile and Ohio railroad from
about twenty-five miles south of Corinth, north to Columbus, Kentucky;
the Mississippi Central from Bolivar north to its junction with the
Mobile and Ohio; the Memphis and Charleston from Corinth east to Bear
Creek, and the Mississippi River from Cairo to Memphis. My entire
command was no more than was necessary to hold these lines, and hardly
that if kept on the defensive. By moving against the enemy and into his
unsubdued, or not yet captured, territory, driving their army before us,
these lines would nearly hold themselves; thus affording a large force
for field operations. My moving force at that time was about 30,000
men, and I estimated the enemy confronting me, under Pemberton, at about
the same number. General McPherson commanded my left wing and General
C. S. Hamilton the centre, while Sherman was at Memphis with the right