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Formable countries

(Redirected from Unification)

A formable country is one that does not exist at the beginning of the game (although it might in later historical starts) but can be formed if certain conditions are met. A reformable country is one that does start as an independent nation but if it ceases to exist, then other countries with similar culture may transform into it, adopting their flag, ideas, and identity. All the relevant formation decisions can be found in their respective country pages (unless otherwise stated).

Formable countriesEdit

All of these formation decisions require that the game is using the historical setup.

Former colonial nationsEdit

The following nations can only be formed by former colonial nations who have achieved independence. Unlike other formable nations, these can be formed in games using the random setup. A country can only form one of these nations during a scenario. Except for Brazil, Canada, Mexico, Quebec, Texas, and the United States, these nations don't have unique ideas or events, so the formation decisions are mostly cosmetic, although they usually provide prestige and permanent claims on their respective regions.

Reformable countriesEdit

The following nations can be reformed by other nations if they cease to exist:

End-game tagsEdit

Some countries are end game tags. These countries are not allowed to form other countries even if they otherwise meet the prerequisites.[1] Three exceptions are the last imperial reform creating the Flag of Holy Roman Empire Holy Roman Empire, the Flag of Roman Empire Roman Empire restoration decision, and Flag of Yuan Yuan forming the Flag of Mongol Empire Mongol Empire


Effects of formationEdit

  • Most formable countries have unique national ideas. An event triggered by the formation decision gives a choice between switching ideas or keeping the existing set. Note that custom nations cannot change ideas this way.
  • Formation of a new country changes "historical rival" attitudes regarding other countries. For example, if Christian   Ottomans form   Roman Empire, they will no longer be historical rivals with   Timurids. This also applies inversely; if   Burgundy form   France, they will become historical rivals with   Austria.
  • Although diplomatic relations (alliances and rivalries) won't change, the attitude of other non-rival countries will temporarily become "unknown" (for a month or so). This can cause an ally to announce the newly formed country as rival, if this ally is below the rivals limit. For example, if   Morocco is allied to   Granada and has fewer than 3 rivals, and Granada forms   Andalusia, then Morocco will immediately rival Andalusia upon formation.
  • Nation formation and reformation can form part of a strategy for reducing core creation cost. Permanent claims given by formation decisions give valuable bonuses such as −25%   core creation cost and casus belli over a large area. Moreover, re-forming a destroyed nation allows cores to be conquered for no administrative power or diplo-annexed for no diplomatic power.


  1. These country decisions with was_never_end_game_tag_trigger = yes block these tags specifically.