Acceptable Reasons for War

War of Territorial Expansion - If you can prove that you need more land, you may declare war on a neighboring nation to expand.

War of Ideology - If you can prove that your ideology and your opponent's ideology are different enough to war over, then you may declare war

War of Religion - If you declare war for religious regions, you may only target other Religious nations

Formal War - You may only declare a formal war after severe diplomatic incidents

War of Liberation - You may only declare war when someone conquers an allies land/city. When city/land is recaptured, it will be turned over to the original owner

War of Reconquest - You may only use this one when reconquering lost territory

War of Humiliation - You may only use this one to humiliate those who have caused severe diplomatic incidents. No cities are allowed to be conquered