It's not a myth...refer to the tariff of 1828:
Post# of 65629
The Tariff of Abominations
http://history.house.gov/Historical-Highlight...minations/
You ..once again....failed to read your provided pitch thoroughly. You just googled .. https://www.google.com/search?q=tariff+during...+civil+war ... and found the quickest response. This is not a myth..........you dumb ass Northerner!