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From Wikimedia Commons (CC-BY-SA where not otherwise stated).
Photo by Unknown via Wikimedia Commons (CC BY 4.0)
Photo by War Department. Office of the Chief of Engineers. 1818-9/18/1947 via Wikimedia Commons (Public domain)
Photo by Blonogren Brothers via Wikimedia Commons (Public domain)
Photo by True Williams via Wikimedia Commons (Public domain)
Photo by Harper's Weekly, April 5, 1862 via Wikimedia Commons (Public domain)
Photo by from A.T. Andreas' History of Chicago, Vol. II via Wikimedia Commons (Public domain)
Photo by Chas. Shober & Co. via Wikimedia Commons (Public domain)
Photo by Wikideas1 via Wikimedia Commons (CC0)
Background
Camp Douglas, in Chicago, Illinois was one of the largest Union Army prisoner-of-war camps for Confederate soldiers taken prisoner during the American Civil War. Although not alone in this distinction, it is sometimes described as "The North's Andersonville." Based south of the city on the prairie, it was also used as a training and detention camp for Union soldiers. The Union Army first used the camp in 1861 as an organizational and training camp for volunteer regiments. It became a prisoner-of-war camp in early 1862. Later in 1862 the Union Army again used Camp Douglas as a training camp.
