Vicksburg is a town in the State of Mississippi that is located on the Mississippi River. It was the scene of a campaign during the American Civil War in 1863. A city of western Mississippi on bluffs above the Mississippi River west of Jackson. During the Civil War it was besieged from 1862 to 1863 and finally captured by troops led by Ulysses S. Grant on July 4, 1863. Population: 25,700.