The battle you are referring to is actually called the Battle of the Ironclads. In this battle, it was the Merrimac (from the Confederacy) versus the USS Monitor (from the Union). This was the first battle between iron-fortified vessels in the Civil War. This battle ended up in a draw but represented a new form of fighting that both the Union and Confederacy had to be ready for.
Reconstruction lasted from 1863 to 1877, reconstruction abolished slavery and the communist. Reconstruction made the newly freed slaves have rights.
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In October of 1950, UN forces pushed the North Koreans as far north as the Yalu River on the border with China.
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