Answer:
Because they never experienced the violence.
Explanation:
I'm not sure if this is the answer but I think it was because they never experienced the violence that they were giving people. Sorry if this doesn't make sense but I tried. :)
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.
<span>the closing of the port of Boston Tea Party. </span>
The u.s new an attack was coming but they didn't know when, as a result they were unprepared and lost a lot of their stuff