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 "Ironclad Board"): The primary goal of the Ironclad Board was to develop more battle-worthy ("ironclad") ships, leading to the construction a number of innovative designs, including the USS Monitor.
Relevant evidence: No