[Wissa]

And yet upwards of 95% of all tariff revenue was collected in Northern ports - specifically New York, Boston, and Philadelphia - as government documents for the year just prior to the rebellion show. How do you explain that? And if you do assume the South paid 75% of the tariff then what were they importing in such massive amounts?

I'll admit that I'm no expert on the matter, but I've always heard that tariffs were an issue for the South. Here's the first article I clicked on when I did a search: https://dailyprogress.com/opinion/columns/protective-tariffs-primary-cause-of-the-civil-war/article_63b77f5c-dc0c-11e2-8e99-001a4bcf6878.html

I have no idea what kind of slant the site has, so I don't know what kind of biases are thrown into the article.

[DoodleDawg]

...but I've always heard that tariffs were an issue for the South.

Because it sounds better for Confederacy supporters to claim the rebellion was over the tariff than over slavery.