Because Grant had ended the system of prisoner-exchange, so the prison-camps were bound to become overcrowded.
Meanwhile, he had also told Sherman and Sheridan to devatstate the Southern farm country, to starve the Confederate armies.
The governor of a prison-camp deep in Georgia was not likely to spare much food or sympathy for captured Union troops.
Andersonville
I believe it was Andersonville----Google it for more info
The infamous prison in the southern United States is called Alcatraz, located in San Francisco Bay. It was known for housing some of the most notorious criminals in American history.
The most infamous prison in the south. There was no shelter. There was a huge population, and there were food shortages, overcrowding, and disease that killed about 100 men a day during the summer months.
* Andersonville - Andersonville, Georgia * Belle Isle - Richmond, Virginia * Blackshear Prison - Blackshear, Georgia [19] * Cahaba Prison (Castle Morgan) - Selma, Alabama * Camp Ford - near Tyler, Texas [20] * Castle Pinckney - Charleston, South Carolina * Castle Sorghum - Columbia, South Carolina * Castle Thunder - Richmond, Virginia * Danville Prison - Danville, Virginia * Florence Stockade - Florence, South Carolina * Fort Pulaski - Savannah, Georgia * Gratiot Street Prison - St Louis, Missouri * Libby Prison - Richmond, Virginia * Salisbury Prison - Salisbury, North Carolina (according to Wikipedia.com)
The horrors of Andersonville were essentially incomparable with any other wartime prisons during the civil war. The war crimes committed in the prison were so severe that the warden was put to death for his brutality after the war.
Andersonville
13,000 Union Soldiers died of disease and malnutrition at the Confederate prison in Andersonville, Georgia
Andersonville - scandalously overcrowded, horrific.
south carolina
In the last year of the war, after Grant had ended the system of prisoner exchange. All the prison camps - North and South - then became shockingly overcrowded and disease-ridden. But Andersonville, holding Union prisoners in Georgia, was the worst of all, with starvation leading to gang-murder and even cannibalism. Significantly, the commandant of Andersonville (Wirz) was the only Confederate to be hanged for war-crimes.
Although the POW camp at Andersonville, Georgia was the cruelest Confederate POW camp by far, Union camps were terrible too. As an aside, the commander of the Andersonville camp was the only person tried for war crimes and was hanged after the war. This is an indication of bad things were in that camp.