<span>Japan launched a sneak attack on the American naval base at Pearl Harbor Hawaii.</span>
that would be hawaii my good chap. i do hope this helps you in your endeavors. :)
Some examples of this were the Fugitive Slave Act, Preston Brooks's attack on Charles Sumner, and the Dred Scott decision (the part of it which said that African Americans could never be citizens). None of these events tangibly hurt the North or the South.
The prospect of new lands to be taken/businesses be built. People wanted money!!!
Given that sectionalism deals with restriction of interest
to a narrow sphere; undue concern with local interests or petty distinctions at
the expense of general well-being.
Also, that the south was the raciest towards people that
looks different than them. Then it only stands to reason that the sectionalism
was the one thing that the North did not like which led to the Civil War.