I believe it's the tenth amendment.
What do you mean by subject like school wise classes if so history.
What decision are you talking about?
The answer is: cannon fire, ram and torpedoes
Ironclads were warships used in the Battle of the Monitor and Merrimack. The battle is famous because was the first clash between ironclad warships. It took place on March 8, 1862 and March 9, 1862 and changed the future of naval warfare.
The ships were destroyed by long range, explosive cannon fire.