Earlier quoted context omitted.
Consider also that there are arms manufacturers and state militias all across the country. If it's California, they have (some of) Northrop Grumman. If it's Virginia, they have General Dynamics Mission Systems.
Both of which can get magically disappeared in hours with the superior weaponry and numbers in the hands of the federal government.
This is not the way things would play out. The federal government would twiddle their thumbs and say that they are very cross with the separatists, and we'd all get on with our lives.