Question: The Ironclad Board was an advisory board, established by the Union, in which year, in response to the construction of the "CSS Virginia" by the Confederacy during the US Civil War,primary goal of the Ironclad Board was to develop more battle-worthy ("ironclad") ships, including the USS Monitor, an iron-hulled steamship?
Sentence (from "USS Monitor"): The unique design of the ship, distinguished by its revolving turret which was designed by American inventor Theodore Timby, was quickly duplicated and established the monitor type of warship.
Relevant evidence: No