The Union Siege of Vicksburg (3) tv-pg Play video Select your TV provider to log in to have full access to videos Select your TV provider See all providers Don't see your TV provider? Learn more You can access this video on the free HISTORY® apps. *You must verify your TV provider towatch this video on the App Your Parental Control settings do not allow you to view this content. The Union Siege of Vicksburg (3 min) tv-pg The heavily fortified city of Vicksburg is the gateway to the Mississippi River. To force surrender, Ulysses S. Grant holds the rebel forces under siege for six weeks.