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USS Marmora was a sternwheel steamer serving in the Union Navy from 1862 to 1865 in the American Civil War. Built in 1862 as a civilian vessel, she was bought for military service in September, and converted into a tinclad warship. Commissioned on October 21, she served on the Yazoo River and was on the Yazoo during the Battle of Chickasaw Bayou in December. She was assigned in 1863 to a fleet operating against Fort Hindman, but was absent when the fort surrendered on January 11. From February to April, she participated in the Yazoo Pass expedition, and in June burned two Arkansas settlements. In August, she saw action on the White River when the Little Rock campaign was beginning, and patrolled on the Mississippi River late that year. She fought in the Battle of Yazoo City on March 5. She was declared surplus in May 1865 and put in reserve status at Mound City, Illinois. She was decommissioned in July, and sold at auction on August 17, after which nothing is known. (Full article...)