CHAPTER XXX.
THE CAMPAIGN AGAINST VICKSBURG--EMPLOYING THE FREEDMEN--OCCUPATION OF HOLLY SPRINGS--SHERMAN ORDERED TO MEMPHIS--SHERMAN'S MOVEMENTS DOWN THE MISSISSIPPI--VAN DORN CAPTURES HOLLY SPRINGS--COLLECTING FORAGE AND FOOD.
Vicksburg was important to the enemy because it occupied the first high ground coming close to the river below Memphis.

From there a railroad runs east, connecting with other roads leading to all points of the 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.