
Things like the domiciles of family members, betrothals, status as allies, and more, all factor in to whether or not you can begin your attack.

Additionally, your target must meet several conditions. However, though the mechanics are as simple as heading to the diplomacy menu and declaring war on the neighboring nation you want to attack, there are still several requirements you must meet before that Declare War button is not grayed out.įor your country, you must not be imprisoned by another country, you can’t have any army levies in place, and you must not be bankrupt. Once you have a Casus Belli in place, it’s time to declare war. They tend to draw in many neighboring states that have the same beliefs as your enemies. However, we recommend caution with Holy Wars. You can have multiple Casus Belli for each target you wish to battle. Declarations of war come in four basic types: Claim, De Jure, Invasion, and Holy Wars. Crusader Kings II is special though, in that the main way you take territory in the game is through warfare.Īs expected, this means there are arguably more Casus Belli in CK2than in any other of Paradox’s 4X strategy games.


If you’re familiar with Paradox Interactive’s style of grand strategy, this diplomatic concept should be familiar. Casus Belliīefore you can make the diplomatic action of declaring war, you need to have a Casus Belli.

To help you understand the nature of war making, we’ve put together a guide on how to declare war in CK2. These justifications for war are put in place to make sure that players and AI alike aren’t constantly attacking each other without cause. As with most Paradox Interactive grand strategy games, the ability to declare war is bound to decrees known as Casus Belli.
