Andersonville, or Camp Sumter as it was officially known, was one of the largest of many Confederate military prisons established during the Civil War. It was built early in 1864 after Confederate officials decided to move the large number of Federal prisoners kept in and around Richmond, Virginia, to a place of greater security and a more abundant food supply . During the 14 months the prison existed, more than 45,000 Union soldiers were confined here. Of these, almost 13,000 died from disease, poor sanitation, malnutrition, overcrowding, or exposure to the elements.