No room for the question mark in the title.
Anyway I keep seeing (for example) France going to war with Brittany (independent) because it's a de jure duchy of the kingdom of France and taking away a province at a time. It doesn't take long for Brittany to disappear, and as this rule applies globally it tends to give awkward results.
Does anyone know how I can change this? I don't mind the king of France going to war with the duke of Brittany if he has a legitimate claim on a Breton county (or even the duchy itself through marriage) -- or perhaps if the duke of Brittany has been excommunicated and so on; I just don't think he should have carte blanche to wipe out Brittany because it's de jure part of France. This never happened historically and the French kings became dukes of Brittany through marriage.
I looked in cb_types.txt and noticed 'dejure_barony_claim' and 'dejure_county_claim' but I think they were both in 1.04 and just mean that people can claim baronies and counties. I assumed there'd be something like 'dejure_duchy_claim' but can't see it.
Can anyone help me with this?
(And I know the kingdom of Brittany is not de jure part of France but I don't want that and so I've changed it)