....Williams is correct...1861-1865 was not a civil war...it was a war of secession and partition....we’ve had three of those so far: 1776,1832,1861...those were based on politics...the coming one will be tribal, and if I were betting on it; the Southwest will be where it will start.
You neglected the Essex Junto and Hartford Convention in New England, when that region flirted with secessionism--and were accused of treason by "states' rights" defending Southerners.