All the Paradox games I've encountered so far have had a fine distinction between war and peace; you pick another country, select from a menu and declare a war for an objective. But is this an essential feature? From what I understand, the VAST majority of conflicts, even international ones, prior to the modern era were undeclared, to the degree that border conflicts were a routine part of peacetime. Could, for instance, CK3 simply have a realm raise its army and attack another one, which the size of the attack correlated with the enemy's size of response?
I know this would require some pretty radical changes, but would there be anything too radical? The AI would have to be massively rejigged, there would have to be some sort of alert for every ongoing attack and how exactly armies passing through would be dealt with, I don't know; perhaps that realm's permission would be required to stop the AI from considering the armies inevitably hostile.
Note these aren't rhetorical questions; I honestly have no idea. There's likely a serious problem or 20 I have not brought up, but this is only intended to bring people's attention to an option that may simply have never occurred to most.
I know this would require some pretty radical changes, but would there be anything too radical? The AI would have to be massively rejigged, there would have to be some sort of alert for every ongoing attack and how exactly armies passing through would be dealt with, I don't know; perhaps that realm's permission would be required to stop the AI from considering the armies inevitably hostile.
Note these aren't rhetorical questions; I honestly have no idea. There's likely a serious problem or 20 I have not brought up, but this is only intended to bring people's attention to an option that may simply have never occurred to most.