From Wikipedia Picture Of The Day; July 19, 2013:
A map showing Camp Sumter, an American Civil War-era prisoner-of-war camp at Andersonville, Georgia, United States. Prisoner-of-war camps are used for the containment of combatants captured by their enemy in time of war. During the Civil War, it was common for prisoners to die of starvation or disease; in Sumter, for instance, 28 percent of the 45,000 Union soldiers died.
Drawing: John L. Ransom; restoration:Jujutacular