The USS Osage was a Neosho-class monitor built for the Union Navy during the American Civil War, launched on January 13, 1863, by James Eads at his Union Iron Works in Carondelet, Missouri. She measured 180 feet in length overall with a beam of 45 feet, and her draft was slightly deeper than initially planned, at approximately 4 feet. The vessel displaced approximately 523 tons burthen and was powered by four steam boilers driving a two-cylinder, steamboat-type sternwheel engine, allowing a maximum speed of around 12 miles per hour. Her coal capacity was 50 long tons, supporting her operational range, and her crew numbered about 100 officers and enlisted men. The USS Osage's armament comprised two 11-inch Dahlgren smoothbore guns mounted in a single revolving turret at the bow, capable of firing shells up to 3,650 yards. The turret had a 300° arc of fire and was protected by 6 inches of wrought iron. The hull was armored with 2.5 inches of iron, while the deck and paddle housing featured 1.25-inch armor. The ship's design included a deckhouse between the funnel and sternwheel, with her pilothouse located above the rear deckhouse. Commissioned on July 10, 1863, under Acting Volunteer Lieutenant Joseph Pitty Couthouy, Osage was assigned to Rear Admiral David Porter's Mississippi Squadron. She played a vital role in patrolling the Mississippi River, defending against Confederate raids, and supporting Union operations such as the capture of Fort DeRussy and Alexandria, Louisiana, in March 1864. During the Red River Campaign, Osage supported land operations, ran aground but managed to free herself and continue her duties. In May 1864, she grounded on a sandbar near Helena, Arkansas, suffering hull damage when the receding water caused her to hog at the ends. After repairs, she was transferred to the West Gulf Blockading Squadron in early 1865 to participate in the campaign against Mobile, Alabama. During the Battle of Spanish Fort in March 1865, Osage struck a mine and sank rapidly, resulting in the loss of two crewmen. She was later salvaged and, after the war, sold at auction in 1867 for $20,467. The USS Osage remains a notable example of Civil War naval innovation, exemplifying the use of armored monitors in riverine and coastal operations.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.