LOL. Nobody in the South even considered taking over occupying the North by force, that thought is laughable.
Nonsense. When you think about it...
Confederates claimed & invaded three Union states, Missouri, Kentucky & West Virginia, plus Union territories of Oklahoma & New Mexico/Arizona.
They also invaded Union Maryland, Pennsylvania, Ohio, Indiana, Kansas, Oklahoma & New Mexico/Arizona.
Confederate guerilla forces operated in California, Colorado & even Vermont, among others.
In the Civil War's first 12 months more battles were fought and more Confederate soldiers died in the Union than Confederacy.
That's what makes it absurd to claim the Confederacy was not an existential threat to the United States.