In the last US civil war, West Virginia seceded from Virginia in a mass refusal of complicity and enlisted their fighting power to defeat the slave states.
Other communities south of the Mason-Dixon raised hell behind enemy lines, driving domestic production and logistics into chaos, in places like the Ozark hills.
And most importantly, Black slaves undertook the greatest labour action your country has ever seen, sapping the foundations of the entire evil enterprise.
You can do this.