The term "War of Northern Agression" can only be seen as an orwellian term when we consider that 11 of the first 15 presidents were southern, that tariff rates were set just the way that southerners wanted them, and that the Supreme Court had sided strongly with southern interests. The most intrusive piece of federal legislation --by far-- prior to the ACW was the Fugitive Slave Act which made a mockery of states rights -- nothern states rights, which was also the import of the Dred Scott decision.
You can call it the WNA all you like, but there is no basis in the record for that, and whatever you had to say of value will be compromised BY that.
Don't forget also that the so-called CSA raised a 100,000 man army when the US army was only 17,000 strong. Don't forget that the so-called CSA actually promulgated a declaration of war before Presidend Lincoln called for volunteers to restore the rightful authority, and don't forget that the forces of the so-called CSA fired the first shot.
It was really the war of 'southern hubris, lack of analytical powers, and dearth of adult behavior'. It was in fact the:
SHLAPDAB
Walt