First through shifting of taxes owed from the War For Independence. Secondly through abolitionists attempts to incite slave insurrections. Thirdly through Northern merchants putting all of their money behind getting certain trade laws inimicable to Southern economic interests passed through Congress. Lastly through illegal invasion of the Southern States by military force.
How did they do that?
The government didn't support that. They sent troops to put down Brown and let Virginia try him on those ridiculous treason charges.
Thirdly through Northern merchants putting all of their money behind getting certain trade laws inimicable to Southern economic interests passed through Congress.
For example?
Lastly through illegal invasion of the Southern States by military force.
There was nothing illegal and there was no invasion. One does not invade ones own country.