What war is related to the surrender of Vicksburg?

The surrender of Vicksburg is related to the American Civil War, specifically occurring on July 4, 1863. This significant event marked the culmination of a prolonged campaign by Union General Ulysses S. Grant to gain control of the Mississippi River. The fall of Vicksburg effectively split the Confederacy in two and was a turning point in the war, boosting Union morale and strategic advantage.