The Red States are like Sparta. Strong tradition of their citizens entering the military, but the military is land-based, and generally only fights defensive wars, not imperialist ones.
The Blue States are like Athens. They mostly HIRE their military from the underclasses or immigrants. They are air and sea-based, and quick to fight wars where there is money or land to be gained.
I’d suggest you read the whole thing. Someone in politics needs to be talking about this. We’ve mostly been approaching the planning of our military budget as though we were Athens. We need to shore up our defensive posture, beginning with hardening our utilities and other infrastructure.