Formable countries

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See also: Formation decisions

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). Generally, a nation must meet the following requirements to form most formables:

  • Target formable does not exist
  • At peace
  • Admin tech level at least 10
  • Is not a non-tributary subject
  • Is not a Steppe Horde
  • Own and core certain provinces
    • Some provinces can also be owned by non-tributary subjects

Formable countries

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

Former colonial nations

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. Around half of 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.

Pirate nations

These pirate nations (except for Flag of Tétouan Tétouan who has a core in the 1444 start date) can only appear via special event which allows the player to either: to release said country as an independent nation, release it as a march, or play the country as a newly released independent nation.

Federation countries

These countries can be formed by uniting a federation with the federation advancement “Federal Constitution”. Which country gets formed depends on the Primary culture.png primary culture of the federation leader (in parenthesis).

Reformable countries

The following nations exist at the 1444 start, but can be reformed by other nations if they cease to exist:

End-game tags

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. However, you cannot restore the Flag of Roman Empire Roman Empire as the Flag of Holy Roman Empire Holy Roman Empire or the Flag of The Papal State The Papal State. The end-game tag restrictions can be lifted by disabling the option Limited Country Forming.

German regional tags

Some countries are German regional tags. These countries are not allowed to form other German countries even if they otherwise meet the prerequisites.[2] The decision to form Flag of Prussia Prussia is the only one of these that does not exclude German regional tags, so Flag of Prussia Prussia can be formed by the other nations on this list, but Flag of Prussia Prussia itself can't form the other countries.

Effects of formation

  • 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 do not get the event this way.
  • Formation of a new country changes "historical rival" attitudes regarding other countries. For example, if Christian Flag of Ottomans Ottomans form Flag of Roman Empire Roman Empire, they will no longer be historical rivals with Flag of Austria Austria. This also applies inversely; if Flag of Burgundy Burgundy form Flag of France France, they will become historical rivals with Flag of Austria Austria.
  • 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 Icon.png 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.
  • Forming another nation while being the Emperor of china icon.png Emperor of China resets all reforms made as the previous nation. This is important to keep in mind if looking to form Flag of Qing Qing or Flag of Yuan Yuan.


  1. The country decisions with was_never_end_game_tag_trigger = yes block these tags specifically.
  2. The country decisions with was_never_german_regional_tag_trigger = yes block these tags specifically.