Noun vicksburg has 2 senses

• vicksburg(n = noun.location) Array - a town in western Mississippi on bluffs above the Mississippi River to the west of Jackson; focus of an important campaign during the American Civil War as the Union fought to control the Mississippi River and so to cut the Confederacy into two halves; Array
is a kind of town
is a part of magnolia state, mississippi, ms

• vicksburg(n = noun.act) siege of vicksburg - a decisive battle in the American Civil War (1863); after being besieged for nearly seven weeks the Confederates surrendered; Array
is a kind of beleaguering, besieging, military blockade, siege
is a part of american civil war, united states civil war, war between the states