When the boiler exploded aboard the steamer Sultana on April 27, 1865, more than 1,700 people lost their lives. Most of those aboard were recently released Union prisoners from Confederate prisons in Cahaba, Alabama, and Andersonville, Georgia. They were en route from Camp Fiske in Mississippi to Camp Chase, Ohio, but the explosion occurred only a few hours into the journey.
In addition to the faulty boiler, the ship was also grossly overburdened with 2,200 passengers on a vessel built to carry