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Hello, I don't fully understand it, but it's a pity that there is no mod like this anywhere:
I'm invading the kingdom of Casus Belli but it turns out that you won't be able to conquer the entire lands, so why not make a white peace on the principle that I only conquer part of the land from Casus Belli. If you don't understand, let me explain it this way
I invade France but in the end I only conquer the Duchy of Burgundy

Trying in now will let you know :) Thanks for making this.