 USS Chickasaw was an ironclad Milwaukee @-@ class river monitor built for the United States Navy during the American Civil War . The ship participated in the Battle of Mobile Bay in August 1864 , during which she was lightly damaged , and the bombardments of Forts Gaines and Morgan as Union troops besieged the fortifications defending the bay . In March – April 1865 she was used to transport Union troops from New Orleans to the Gulf Coast . She was decommissioned in 1865 and sold for commercial use. październik 1865 she was wrecked on the shoals of Pascagoula , Mississippi ,