Vicksburg, Mississippi ( July 4, 1863 )

BATTLE AND SIEGE OF VICKSBURG

http://www.civilwar.org/battlefields/vicksburg/maps/vicksburgmap.html

Battle and Siege of Vicksburg
May 18 - July 4, 1863

On July 4, Pemberton surrendered his army to Grant, ending the siege and placing control of the vital Mississippi firmly in Union hands, effectively cutting the Confederacy in half. Grant's success silenced many of his critics and increased his reputation with the Lincoln administration, ultimately leading to his appointment as General-in-Chief of the Union armies.