This grants you the special “de jure claims” Casus Belli, which allows you to declare war to take a single county belonging to a duchy under your rule. When you are the holder or liege of a ducal title, you can ‘legally’ expect to be ruler of all of its constituent counties as well. This system governs multiple different mechanics, but the most important for this guide is the de jure claims. Every province belongs, de jure, to a duchy, every duchy to a kingdom and every kingdom to an empire. De Jure Claimsĭe jure is Latin for “from law”, and is Crusader Kings’ way of dividing the map into various duchies, kingdoms and empires. If you can afford to wait for multiple claims to generate, this is a great way of expanding quickly as a small count or duke. Even better, as long as you start the war with this specific CB, any claims you fabricate during the war will be added to the victory condition of “all claims”. If you have multiple claims on a target, you earn the new CB “Press All Claims” which, if you are successful, will give you all of your claims on the target, rather than just one county. Press All Claims: Another strength of fabricated claims is the ability to press multiple of them in one war. It’s often worth using your Chancellor for this, but not as your exclusive method of expansion. The chances of success are based on your Chancellor’s diplomacy stat, and with a high enough stat he can even create a claim on a whole duchy if the target holds one.Īlthough this is powerful when it works, the low chance of success and the fact that it’s entirely up to chance makes this a very unreliable method of expanding. Simply tell your Chancellor to sit in a neighbouring province and he’ll have a percentage chance over time to generate you a claim. In my original guide, How to Get Married and Go to War I briefly touched on the ability to fabricate claims on your neighbours. Understanding the theory and practice behind earning a CB will ensure that you never have to be at peace for long. What I’m going to be focusing on instead is how you actually go about earning these CBs. If that’s the information you’re looking for, take a look at the Casus Belli section of the CK2 Wiki. Far too many for me to go through them and explain what they all do. Although it might not seem like it when you start as a Catholic ruler, there are a lot of Casus Bellis (CBs) in Crusader Kings 2.

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