On July 1, 1863, the Confederate fortress city of Vicksburg surrendered after a long siege. However, from 1861-2 onwards, the city had been assaulted several times and was able to survive.
Vickisburg (Warren County), Mississippi
May 18 - July 4, 1863
Union vs. Confederate (North vs. South)
At the Mississippi river-port of Vicksburg, where Grant besieged the Confederates under Pemberton.