Well, a war typically costs trillions. Which is usually just printed out of thin air. On a truly global Bitcoin standard, you could not afford that war. Because

Well, a war typically costs trillions. Which is usually just printed out of thin air. On a truly global Bitcoin standard, you could not afford that war. Because even a government would have a limited supply of Bitcoin, and they can't just create new ones. So the only way to pay for such a war, is to do extremely heavy taxation on your citizen's Bitcoins. Good luck with that.