Andersonville National Historic Site
The camp was overcrowded with four times as many prisoners as it was designed to hold.  There was not enough water, food, or sanitation.   About 45,000 Union prisoners were held at Camp Sumter during the war; nearly 13,000 (nearly 3 in every 10) died.  The most common causes of death were scurvy, diarrhea, and dysentery.