Because they'd been under siege for five weeks, and reduced to eating rats and mice.
When Vicksburg surrendered on July 4, 1863, during the American Civil War, Confederate General John C. Pemberton surrendered approximately 29,500 soldiers to Union General Ulysses S. Grant. This surrender was a significant turning point in the war, giving the Union control of the Mississippi River and effectively splitting the Confederacy.
Vicksburg surrendered on July 4th, 1863.
Grant accepted Pemberton's surrender to end the Siege of Vicksburg.
Ulysses S. Grant won the battle at Vicksburg making Lee surrender
When Union General US grant was the victor in a number of battles prior to the siege of Vicksburg, he was known for his policy of "unconditional surrender. This was not the case in the siege and fall of Vicksburg.After consulting with his generals on the two choices they had, which was to try to battle their way out of Vicksburg or surrender, the consensus was to surrender. After that decision they asked General Grant for terms of surrender. With that said, Grant realized that Vicksburg had almost 30,000 troops in the city. Dealing with all of these prisoners would have slowed down Grant's future plans to a maximum level. Grant then followed the then accepted practice of paroling the Rebel soldiers.
Vicksburg.
Port Hudson
It was the battle of Vicksburg.
Yes, they surrendered July 3, 1863
Ulysses S. Grant
The surrender of Vicksburg closed the Mississippi to southern traffic, making the transportation of troops and supplies impossible.
Grant received Pemberton's surrender on July 4th, 1863.