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The CSS Virginia was an American ironclad that was in service with the Confederate States Navy in the mid-19th century. In the American Civil War, the Virginia took part in the historic Battle of Hampton Roads, the first battle between ironclad vessels, when it stood off against the United States Navy USS Monitor.
A painting depicting this battle was stored in the USS Enterprise's library computer in 2254, and was among the materials viewed by the Talosians when they scanned the Enterprise computer. (TOS: "The Cage")