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Types of War in Civilization VI. See Casus Belli for all the complex ways to go to war.

Types Of War[ | ]

The War and Casus Belli types In Civilization VI.
War Type Warmonger Penalty Description Notes
Declare Surprise War Heavy
Declare Formal War Moderate Used to declare war on a player you have Denounced at least 5 turns ago. No restrictions on which cities you may capture.
Declare Joint War Establish a Joint war against a target civilization.
Declare Holy War Moderate Used to declare war on a power that has Religiously converted one of your cities. All Warmonger penalties halved.
Declare Liberation War None Used to declare war on a power that has captured a city from one of your friends or allies. No Warmonger penalty for liberating any of those cities.
Declare Reconquest War None Used to declare war on a power that has captured one of your cities. No Warmonger penalties apply.
Declare Protectorate War None Used to declare war on a power that has attacked one of your allied City-States. No Warmonger penalty for liberating that City-State.
Declare Colonial War Moderate Used to declare war on a power that is two technology eras behind you. All warmonger penalties halved.
Declare War of Territorial Expansion Egregious Used to declare war on a power that borders your empire. Must have 2 of your cities within 10 tiles of 2 opponents' cities. Warmonger penalties reduced by 25%.
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