We'll still have Peacocks even after we lose revanchism. People like military glory, expansion and using the strength they know we have. Even commoners like those things when they don't involve mass drafts and strained economies. Winning feels good, coming through shared struggle builds social cohesion and pride - unpopular governments look for short, victorious wars for a reason.
Sure, but do we want those people validated and thus strengthened, even if they'll keep hanging around in some form?
Also worth bearing in mind that our method of war is quite taxing on the population, especially when we start fighting other powers. It's something our people will easily get the necessity of defensively but will balk at offensively.
We could keep building up our banners companies and keep them in conflicts all the time to make them pay for themselves, but that's a recipe for disastrous diplomacy.
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Okay, now that the update is in... I think there's multiple acceptable strategies.
We can nip this in the bud, give the Rus their land back and resettle the settlers on our own. Western Wall will hate us for a while but without the settlers agitating from their colonies it'll fade over time. And the Rus will see us positively so we can pull them into our alliance network along with Amber Road.
Or we can try to integrate the Rus as their own province with its own nobles and governor... But then what to do with the settlers? If we leave them there they'll keep agitating to reintegrate with Western Wall and against the Rus. If we're going to resettle them anyway we may as well give the Rus independence and ensure friendship that way.
I'm worried Rus province legitimizes their conquests. Having friends on our borders, option 1, might not be a bad thing.
To be fair, getting the new province taken away from them and their settlers removed back to your land while a pro-Rus governor is installed isn't a great encouragement for autonomous conquest since we're removing all the benefits.
I'm more worried about it legitimizing conquests
in the core than in the periphery (which would be a worry if we let them have it/settle it.
I'm tentatively on independence + repatriation of settlers.
I'm not too mad if we settle on separate province + repatriation, but I'm worried about the legitimation of expansionism.
Settler colonialism has to go of course.