Read your red team planner.
"Hundreds of thousands" of troops might, MIGHT, be able to contain NY and Boston.
In a civil war, the left loses. Period. Every single time they wargamed it out. The only question was how long it took, and how many died.
The left doesn't understand that the second a civil war is started, "Billy Joe Jim Bob" is going to cut power to the major cities by shooting transformers. Once the electricity is out for 60 days, 90% of the population in that city is dead.
Relax. We win, or we win in the civil war.