The moment the U.S. military and the citizens of this country begin firing upon each other, this country effectively dissolves as a nation. If any forces of the U.S. military begin slaughtering U.S. citizens, they will automatically create an insurgent uprising the likes of which the world has never seen.
Well, being from Western PA, the Whiskey Rebellion comes to mind.
But even that firing on the citizenry by Washington’s troops didn’t cause the young nation to fracture