Statistics for occurrence #1 of “Confederate states” in chapter 4 of James Barnes, author of David G. Farragut, Naval Actions of 1812, Yank ee Ships and Yankee Sailors, Commodore Bainbridge , The Blockaders, and other naval and historical works, The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 6: The Navy.:

... Confederate states
The Indianola, one of the most formidable ironclads on the Mississippi River, was captured by Confederate troops...
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