On 27 April 1865 the steamboat Sultana, carrying recently released Union prisoners of war, exploded on the Mississippi River, killing 1,450 to 1,900 people. This disaster remains the deadliest maritime loss in U.S. history.

The Sultana was built as a side-wheel steamboat in Cincinnati in 1863. The 260-foot-long wood steamboat transported passengers and freight between St. Louis and New Orleans on the Mississippi River. She was powered by four fire-tube boilers which could generate twice the amount of steam as conventional boilers. The one major drawback is that each boiler required water levels to be always maintained. Since it used river water, this had to be carefully monitored as sediment would block flues. And if the water level got too low hot spots would develop and an explosion would occur. With steamboats of this period using light weight wood that was covered with oil-based paint, fires were a major concern.

J. Cass Mason was the Sultana’s captain and was part owner. He was an experienced captain but had gotten into trouble trying to ship contraband. The Sultana departed St. Louis on 13 April 1865 for New Orleans. When he arrived at Cairo, Illinois on 15 April, he learned the shocking news of the assassination of President Abraham Lincoln. Grabbing a stack of newspapers, he immediately departed south as many places had no telegraph and would not learn the news of this event. Arriving in Vicksburg, he was approached by Captain Reuben Hatch, the chief quartermaster. He had a problem. The recently released Union Army prisoners of war needed to get home. And the government was willing to pay $2.75 for each enlisted man and $8.00 for each officer. Hatch knew that Mason needed the money and offered a 1,0000 Army soldiers. To secure this “guarantee” though, Hatch would get a kickback. Mason agreed and the Sultana continued its journey to New Orleans. Sultana departed New Orleans on 21 April 1865 with approximately 70 passengers, some livestock, and a crew of 85. On the way to Vicksburg, one of the boilers leaked and the steamboat limped into Vicksburg to pick up the Union prisoners heading home.

The boiler needed immediate repair but that would take several days. Mason was concerned that this delay would cost him money and other steamboats would take the released Union prisoners. The mechanic was ordered to make temporary repairs which only took a day hoping to make the full repair when he arrived back in St. Louis. Meanwhile the Sultanabegan taken on the prisoners. The ship had an official capacity of 376 people but would take on 1,950 of the prisoners along with 22 guards and 70 passengers. Every available space was used, and the overflow was so severe that at some places there was noticeable creaking and sagging requiring wooden beams for support. As Sultana departed on 24 April, it was carrying 2,127 people. Making matters worse, a massive Spring flood had occurred making it difficult traveling upriver. When she arrived in Helena, Arkansas on 26 April, a photo was taken showing how overcrowded the vessel was. Arriving at Memphis that night, she unloaded 200 men and sugar before departing around midnight to pick up coal upriver. Around 1 am, the ship continued its journey.

At 2:00 am on 27 April 1865 when Sultana was about seven miles north of Memphis, a massive explosion occurred with one boiler and then the three others exploded. The effect was catastrophic with it tearing through the crowded decks killing many and destroying the pilothouse. The ship was a burning hulk without anyone to steer it. The smokestacks collapsed causing further damage and death. Many became trapped inside as the forward part of the upper deck collapsed onto the middle deck. The twin openings of the main stairway survived allowing many to run down them. However, broken wood on the ship caught fire with the now exposed furnace boxes turning the ship into a raging inferno. Many jumped into the water, some in whole groups. Many were still recovering from their imprisonment and lacked the strength to survive. Whole groups of men clung together in desperation and perished together. Some grabbed ahold of debris to stay afloat.

The steamer Bostona was already heading downriver and came upon the scene at 2:30 am. She rescued scores of survivors in the water. Meanwhile many who had survived were being carried downriver by the current towards Memphis. There were cries of help heard and this caused the docked ships, several steamers and naval ships, to come to their aid. The water was icy cold from the spring runoff and many perished from hypothermia or drowned. A few survivors were even found on trees near the swollen riverbanks. Bodies of victims would be found downriver for months. Nearly all the Sultana’s officers perished including Captain James Cass Mason.

The news was greeted with shock when it was reported. Then it disappeared from the news. The assassination of President Lincoln and hunting down the assassin and those who aided him filled the news. It was not forgotten by the survivors nor by the people of Memphis, who went out of their way to assist those who had survived the disaster. The official investigation concluded that improper water levels along with overcrowding and being top heavy all contributed to the disaster. Another investigation in 2015 suggests that the quality of the metal in the boilers, the use of river water often filled with sediment, and the design of the boilers all contributed to the explosion. Some have speculated that sabotage was involved and while intriguing, no proof has been found to substantiate it. The PBS show History Detectives (2 July 2014) debunks those claims and focuses on the overcrowding and corruption as the major issues.

Despite the catastrophe, no one was held accountable. The military commission that investigated the tragedy determined the boiler explosion was the cause and discounted entirely the fact the ship was overloaded. J. J. Witzig, the supervising inspector of steamboats, found that the patch used for the emergency repair was too thin for the pressure of the return trip. There were other inquiries that pointed fingers at various officers that resulted in the overcrowding of the Sultana. Ultimately a court martial was ordered and both Captain Hatch and Captain Frederic Speed, who had overseen the troops being sent to the ship, were ordered to appear.  Hatch, who had allegations of corruption in the past and had been promoted to Lieutenant Colonel, never appeared. Speed was found guilty of all charges and to be dismissed from the service. This was overturned by the Army Judge Advocate General who determined Speed was not responsible for the actual loading, but Captain George Augustus Williams was.

It was Williams inaccurate numbers to Speed that caused problems with the exact numbers aboard Sultana. Williams was not prosecuted by the Army. Hatch, on the other hand, was relieved of his duties as chief quartermaster on 3 June 1865. Sometime later he was aboard the steamer Atlanticcarrying $14,490 in government money. A thief broke into the safe stealing the money but was captured before docking in St. Louis. However, there was $8,500 missing from the government money that Hatch claimed was in the safe. He was found in violation of government regulations in transporting the money and held liable for its loss.

In the wake of the disaster, safety laws for steamships were changed. The boilers responsible for the explosion were banned. The Act of 1871 established and revised the older Steamboat Act by creating a Steamboat Inspection Service giving it power to regulate all commercial steam-powered vessels, implement measures to protect passengers and crews, requiring licensing of ship masters and chief mates (and the authority to revoke them), and issue nautical rules for steamboat operations. This would shift to the Bureau of Marine Inspection and Navigation (BMIN) in 1936 which was part of the Commerce Department. It would shift to the Coast Guard starting in World War II and has stayed there ever since.

The remains of the Sultana were found 1982 but not in the Mississippi River but under a soybean field on the Arkansas side of the river. The Mississippi River has changed course over the years and so now the remains are on dry land and 2 miles east of where it was in 1865. Various memorials exist to the victims. The Sultana Disaster Museum has opened in Marion, Arkansas. The disaster remains as one of the worst maritime disasters in the United States and yet few know of it.

[This was modified from the 2022 posting. New source material was added along with expanded information regarding the disaster and Sultana]

Sources

Erin Blakemore, “Why Nobody Remembers America’s Worst Maritime Disaster,” History.Com, last modified August 13, 2025, accessed August 20, 2025, https://www.history.com/articles/why-nobody-remembers-americas-worst-maritime-disaster

Allen Coggins and Tennessee Historical Society, “Sultana Disaster of 1865,” Tennessee Encyclopedia, last modified October 17, 2017, accessed August 20, 2025, https://tennesseeencyclopedia.net/entries/sultana-disaster-of-1865/.

Kat Eschner, “This Civil War Boat Explosion Killed More People Than the ‘Titanic’,” Smithsonian Magazine, April 20, 2023, https://www.smithsonianmag.com/smart-news/civil-war-boat-explosion-killed-more-people-titanic-180963008/.

Barbara Voulgaris, “Sultana Fire – a Maritime Disaster That Helped Shape the Coast Guard’s Marine Safety Mission,” United States Coast Guard, last modified April 25, 2025, accessed August 20, 2025, https://www.mycg.uscg.mil/News/Article/4166478/sultana-fire-a-maritime-disaster-that-helped-shape-the-coast-guards-marine-safe/.

“Sultana: A Tragic Postscript to the Civil War,” HistoryNet, last modified April 19, 2020, accessed August 20, 2025, https://www.historynet.com/sultana-a-tragic-postscript-to-the-civil-war/.
“STORIES | Sultana Museum,” Sultana Museum, accessed August 20, 2025, https://www.sultanadisastermuseum.com/stories-from-the-sultana.

“Sultana: Titanic of the Mississippi,” last modified April 27, 2001, accessed August 20, 2025, https://www.unexplainedcases.com/2009/10/sultana-titanic-of-mississippi.html.

“The Disaster | Sultana Association,” Sultanaassociation, accessed August 20, 2025, https://www.thesultanaassociation.com/the-disaster.

“The Sultana Disaster,” American Battlefield Trust, accessed August 20, 2025, https://www.battlefields.org/learn/articles/sultana-disaster.