EU4 Casus Belli
99 Casus Belli
A complete, searchable list of all EU4 casus belli — the justifications for war — with each one's war goal and the peace terms it lets you demand.
A casus belli (CB) is the justification you need to declare war without the heavy stability and aggressive-expansion penalties of an unjustified attack. Each CB sets a war goal — the win condition that fills your war score — and limits which peace terms you can demand. Permanent CBs are always available when their conditions are met; triggered CBs are granted by events, missions or decisions for a limited time.
Muhammad bin Baysonqor has grown too ambitious for his own good. · Demand provinces, Return cores, Become vassal
They are threatening our rule over Japan! · Demand provinces
They are lacking the revolutionary zeal necessary, and must thereby be annexed by us! · Become vassal, Demand provinces, Revoke cores, Release vassals, Release annexed, Gold, Annul treaties
We should annex them! · Demand provinces
The South Slavic people of the Balkans have been divided and subjugated by foreign powers for far too long. It is time that we end this once and for all! · Return cores, Demand provinces
Their nation is focusing on an area close to our border. · Demand provinces, Concede defeat
They reneged on a loan. · Gold, Concede defeat, Trade power, Steer trade
There are many remnants of European Empires in Africa. Let us claim some of them, big or small. · Demand provinces
We have claimed our right to their throne. · Demand provinces, Form personal union
Our subject is an Elector of the Holy Roman Empire, but the Emperor refuses to transfer this role to us! · Claim elector role, Revoke cores, Release vassals, Release annexed, Return cores, Gold, Annul treaties, Trade power, Steer trade, Humiliate
The Danes can no longer be trusted to protect our Scandinavian brethren. It is our duty to rescue the Norwegian crown, and claim the throne for ourselves! · Demand provinces, Claim norwegian throne
Burn the heretics! · Change religion, Demand provinces
We have formed a powerful coalition to cut them down to size. · Release vassals, Release annexed, Return cores, Demand provinces, Revoke cores, Gold, Concede defeat, Dismantle revolution
We deserve independence. · Concede defeat, Independence, Demand provinces
They have colonies close to ours. · Demand provinces
They hold provinces that we have claims on. · Demand provinces
They need to be taken down! · Demand provinces
Mere peasants have no business running a state. They must be put back in their place, forcefully. · Change government, Demand provinces
We must stop the Revolution and restore peace and order! · Become vassal, Demand provinces, Revoke cores, Release vassals, Release annexed, Gold, Concede defeat, Annul treaties, Dismantle revolution, Extinguish the revolution
They hold provinces that have defected from our rule. · Demand provinces
They are not loyal to the true faith! · Release vassals, Release annexed, Return cores, Revoke cores, Gold, Concede defeat, Demand provinces
They have insulted us! · Revoke cores, Gold, Concede defeat, Humiliate rival
They have been spying on us! · Revoke cores, Gold, Concede defeat
They dishonored our call to war. · Revoke cores, Gold, Concede defeat, Humiliate rival
The Eyalet grew bold and tries to break free from our grip. · Demand provinces, Become vassal
They dishonorably broke their oath of vassalage. · Demand provinces, Become vassal
Holy Roman Empire is neither holy nor an empire and most certainly not Roman. · Demand provinces
Their ruler has been excommunicated. · Release vassals, Release annexed, Return cores, Demand provinces, Revoke cores, Become vassal, Gold, Concede defeat
They must be part of the Empire! · Join empire, Release annexed
We have reached perfection. It is our duty to spread this state to the less fortunate civilizations. · Demand provinces
We must force our neighbors to bend knee, so that we may have a regular supply of human sacrifices to keep the end of the world at bay. · Demand provinces, Subjugate vassal, Make nahuatl tributary
We must force them to relocate. · Demand provinces, Force migration, Humiliate, Gold
We will force them to become a Tributary State. · Subjugate tributary state
We will force them to become a Tributary State. · Subjugate tributary state
The Duchy of France must bow to us in perpetuity. · Demand provinces, Form personal union
We must punish them for this unacceptable diplomatic breach. · Revoke cores, Gold, Concede defeat, Humiliate rival
Demand provinces
We should force them to have the same government form as ours! · Change government, Demand provinces
This world is blasphemous and corrupt; we must seek to cleanse this world of vice and sin! · Demand provinces, Change religion, Release vassals
They are accursed infidels! · Demand provinces
They are accursed infidels! · Demand provinces
We have the possibility to humiliate them. · Gold, Humiliate
We can humiliate our rivals. · Demand provinces, Revoke cores, Release vassals, Release annexed, Return cores, Gold, Annul treaties, Trade power, Steer trade, Humiliate, Humiliate rival
The final war to end the Hundred Years' War between the English and the French. · Form personal union
They hold Imperial provinces. · Release vassals, Release annexed, Return cores, Demand provinces
They hold Imperial provinces. · Release vassals, Release annexed, Return cores, Demand provinces
They have annexed an Imperial Principality. · Release vassals, Release annexed, Return cores, Demand provinces
The Holy Roman Empire view it as legitimate to attack this nation. · Demand provinces, Guaranteed join empire, Release annexed
They defected from Imperial Rule and must return to the Empire! · Reintegrate into hre, Release annexed
They will be better off in our glorious empire! · Demand provinces
We deserve independence. · Concede defeat, Independence, Demand provinces
We deserve independence. · Concede defeat, Independence, Demand provinces
They have vassalized an Elector of the Holy Roman Empire. · Release vassals, Release annexed, Return cores
They are oppressing peoples that deserve freedom. · Release vassals, Release annexed, Return cores
From the brink of collapse, the Majapahit Empire is restored and ready to renew its campaigns of subjugation. · Demand provinces, Subjugate vassal, Subjugate tributary state
Malacca has taken the place of Majapahit as hegemon of Nusantara. We will subjugate any who oppose us. · Demand provinces, Subjugate vassal, Subjugate tributary state
The lands around us are divided into numerous Cahs, city states of little consequence. All neighboring Cahs must join our city or perish. · Demand provinces
They hold provinces of our culture group. · Demand provinces
We have some reasonably authentic documents proving the illegitimacy of their ruler. · Form personal union, Demand provinces
Their territory is our rightful claim. They shall serve us as our loyal Eyalet! · Demand provinces, Establish eyalet
It is time to end their existence once and for all and annex their land!\nCan trigger the 'Collapse of the Mamluk Sultanate' event which allows us to establish a Core Eyalet in Egypt without causing aggressive expansion. · Demand provinces
The peasantry yearn to be free of the shackles placed on them by tyrant aristocrats. · Demand provinces, Force peasant republic
We must push back the invaders from our land! · Force out colonizers, Demand provinces
They hold provinces that are rightfully ours. · Demand provinces, Return cores
We must force the Emperor to recognize our religious rights! · Become vassal, Demand provinces, Revoke cores, Release vassals, Release annexed, Change religion, Gold, Annul treaties, Change hre religion
One Empire, one Faith! · Change religion
They broke off from our Personal Union. · Demand provinces, Form personal union
We can revoke their power of an elector. Declaring this war will greatly upset the other electors. · Revoke elector
They are ideological enemies! · Change government, Demand provinces
We are true heirs of Rome and we must reclaim the Roman territories. · Demand provinces
There are still bits of Africa left to be claimed. Let us carve a piece of the pie for ourselves. · Demand provinces
Though late to claim the first lands in America, we can simply claim foreign lands instead. · Demand provinces
We should expand our influence in the Shogunate by seizing land from a neighboring clan. · Demand provinces
They remain ignorant to the teachings of Muhammad. Let us enlighten them by the sword if necessary. · Demand provinces, Change religion
We must spread the Revolution beyond our borders! · Become vassal, Demand provinces, Revoke cores, Release vassals, Release annexed, Gold, Annul treaties, Spread revolution
They are misguided infidels who fail to acknowledge the sins of their ways! · Change religion, Gold, Change culture, Change culture same culture group
We have been tasked with their vassalization. · Demand provinces, Subjugate vassal
To our west lie the mighty realms of the dragon and the sunrise land. Both of them need to fear our might. · Demand provinces
The vile colonists of the European continent dared put a step on our continent. Now we will stand on our own. · Demand provinces
Go to war to help a spawned rebel faction to enforce their demands. · Enforce rebel demands
These heathens have wandered far from the path of Allah. We will show them the way. · Demand provinces, Change religion, Release vassals
We must prove to the world we are deserving of the Mandate of Heaven. · Demand provinces, Take mandate
They are threatening our trade! · Gold, Concede defeat, Trade power, Steer trade
They are threatening our trade! · Gold, Concede defeat, Trade power, Steer trade
They are threatening our trade! · Gold, Concede defeat, Trade power, Steer trade
They are threatening our trade! · Revoke cores, Gold, Concede defeat, Trade power, Steer trade
They embargoed one of our league members! · Revoke cores, Gold, Concede defeat, Trade power, Steer trade
Hunt down the privateers that harm your trade. · Gold, Concede defeat, Trade power, Steer trade
They obstruct our trade! · Revoke cores, Gold, Concede defeat, Trade power, Steer trade
We can take tribal land from our neighbors. · Demand provinces, Force migration, Gold
There can be no peace between tribes and settlers! · Demand provinces, Become vassal, Become tributary state, Gold
Our Tribe is mightier than their Tribe! · Demand provinces, Become vassal, Become tributary state, Gold
Unify lands of the Chinese Subcontinent.\nEvery occupied province in the China Subcontinent gains our territorial core while we are the warleader! · Demand provinces
They are heretics! · Demand provinces, Change religion, Release vassals
All the world brands us monsters; we will fight them all to protect our liberty! · Demand provinces
We should unite Japan under our banner! By conquering the Imperial capital of Kyoto we will place the Emperor under our protection and take over the reins of the Shogunate. · Demand provinces
We should unite Japan under our banner! By conquering the Imperial capital of Kyoto we will place the Emperor under our protection and take over the reins of the Shogunate. · Demand provinces
We must eradicate this archaic institution. · Demand provinces
We will forge an empire to rival that of Genghis Khan. But before we can achieve that, we must retake Yuan. · Demand provinces