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.
Adam Smith wrote the book
People move because of economic situations, family issues, religious or any other types of persecution, and to better the lives of their children
They served with the Confederacy because they believed that the Confederacy fought the big central government that was being imposed by the Union and they wanted to fight this so as to keep sovereignty over their own land. They believed that the Union government didn't care about them while the Confederacy would give them room to breathe.