A casus belli is the justification you need to declare war without wrecking your stability. The add_cb console command grants a casus belli against any nation instantly.
How to add a casus belli in EU4
- Open the console.
- Type
add_cb <cb tag> <target tag>and pressEnter. You can now declare war on that nation with the chosen war goal.
Examples
Every casus belli, its war goal and allowed peace terms are on the EU4 casus belli page; target tags are on the country tags page.
Frequently asked questions
How do I add a casus belli in EU4?
Use add_cb <cb tag> <target tag>, e.g. add_cb cb_conquest ENG gives you a conquest casus belli against England so you can declare war without the unjustified-war penalties.
What are the casus belli tags in EU4?
Casus belli use tags such as cb_conquest, cb_crusade (Holy War) and cb_imperial (Imperialism). Every casus belli, its war goal and the peace terms it allows are on the EU4 casus belli page.
Does add_cb let me declare war freely?
Yes — with a casus belli against a nation you can declare war on it without the heavy stability and aggressive-expansion penalties of an unjustified attack.