nash.html

The maritime war between the Union and the Confederacy during the Civil war was carried out throughout the Atlantic, as is witnessed by the encounter between the Confederate ship the Nashville and the Union ship the Harvey Birch.
While the war began using these traditional wooden ships, by its end it had changed the nature of maritime war, moving it into what is considered to be the start of the modern era through the use of iron ships or ships covered in sheets of iron or metal, called ironclads, powered by steam.