Complex sentence: Camp Lawton was established during the Civil War in the fall of 1864 by the Confederate Army to house Union prisoners of war at Magnolia Springs in order to take advantage of the abundant water supply.
Split into simpler sentences: Camp Lawton was established during the Civil War in the fall of 1864 by the Confederate Army to house Union prisoners of war. The Magnolia Springs site was selected to take advantage of the abundant water supply.