On the morning of June 17, 1862, USS Mound City, St. Louis, Lexington, Conestoga, and transports, under the command of Commander Augustus Kilty, proceeded up White River towards St. Charles, Arkansas, attempting to resupply Major General Samuel R. Curtis's army near Jacksonport.

The Confederate gunboat Maurepas was hopelessly outclassed by the Federal ironclads.
She was deliberately sunk in the river channel along with two steamboats.
Two rifled 32-pounder guns were placed on the bluff along with four field guns, Captain Dunnington commanded the 79 gunners.
Captain Williams directed 35 sharpshooters.
Captain Joseph Fry was in overall command.
The Mound City and St. Louis carried 13 guns each while the Lexington and Conestoga each mounted seven guns.
In addition, the tug Tiger carried a 34-pound howitzer.
There were three transports ferrying 1,000–1,500 soldiers under Colonel Graham N. Fitch.
 
A few miles below Saint Charles, the 46th Indiana Infantry, under the command of Colonel Fitch, disembarked, formed a skirmish line, and proceeded upriver towards the Confederate batteries on Saint Charles' bluffs, under the command of Captain Joseph Fry of the Confederate States Navy.
At the same time, the Union gunboats went upriver to engage the Confederate batteries; Mound City was hit and her steam drum exploded scalding most of the crew to death.
More than 125 sailors from Mound City were killed, but the other ship was towed to safety.
Col.
Fitch halted the gunboat activities to prevent further loss and then undertook an attack on the Confederate batteries with his infantry.
The 46th Indiana turned the Confederate flank which ended the firing from the batteries and left Saint Charles open to Union occupation.

The Confederates spiked their cannons and retreated.
Hindman admitted a loss of six killed, one wounded, and eight missing, including Fry wounded and taken prisoner.
Hindman claimed that his force inflicted 200 casualties, including 180 scalded to death on the Mound City.
On the morning of June 17, 1862, USS Mound City, St. Louis, Lexington, Conestoga, and transports, under the command of Commander Augustus Kilty, proceeded up White River towards St. Charles, Arkansas, attempting to resupply Major General Samuel R. Curtis's army near Jacksonport. 
The Confederate gunboat Maurepas was hopelessly outclassed by the Federal ironclads. She was deliberately sunk in the river channel along with two steamboats. Two rifled 32-pounder guns were placed on the bluff along with four field guns, Captain Dunnington commanded the 79 gunners. Captain Williams directed 35 sharpshooters. Captain Joseph Fry was in overall command. The Mound City and St. Louis carried 13 guns each while the Lexington and Conestoga each mounted seven guns. In addition, the tug Tiger carried a 34-pound howitzer. There were three transports ferrying 1,000–1,500 soldiers under Colonel Graham N. Fitch.  
A few miles below Saint Charles, the 46th Indiana Infantry, under the command of Colonel Fitch, disembarked, formed a skirmish line, and proceeded upriver towards the Confederate batteries on Saint Charles' bluffs, under the command of Captain Joseph Fry of the Confederate States Navy. At the same time, the Union gunboats went upriver to engage the Confederate batteries; Mound City was hit and her steam drum exploded scalding most of the crew to death. More than 125 sailors from Mound City were killed, but the other ship was towed to safety. Col. Fitch halted the gunboat activities to prevent further loss and then undertook an attack on the Confederate batteries with his infantry. The 46th Indiana turned the Confederate flank which ended the firing from the batteries and left Saint Charles open to Union occupation.
The Confederates spiked their cannons and retreated. Hindman admitted a loss of six killed, one wounded, and eight missing, including Fry wounded and taken prisoner. Hindman claimed that his force inflicted 200 casualties, including 180 scalded to death on the Mound City.
Battle of Saint Charles