The Battle Of Vicksburg
General John C Pemberton was defeated at Champion Hill and Big Black River forcing him back to Vicksburg. Here Ulysses S. Grant barraged the fortifications of Vicksburg but with suffering heavy losses he could not keep this up so he laid siege to Vicksburg digging trenches and switching to siege warfare they cut off supplies and wore the city down. They started on march 18 ,1863 and the confederates ultimately surrendered on July 4, 1863.