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The realm factions screen (F8)

Alert faction.png Factions are organized groups of vassals, united against their liege for a common purpose.

When a leader thinks the faction is powerful enough, they can issue an ultimatum to their liege. Unless the liege folds to the demands, this results in a civil war, where all faction members revolt together under a temporary title.

Each vassal can lead or join up to two Factions. If a faction leader dies, the most powerful remaining faction member automatically takes over as the new leader.

Who can join factions[edit | edit source]

Vassals cannot join factions if they are:

Faction strength[edit | edit source]

Players receive a "Dangerous Factions" alert if a faction reaches 70% strength. AI leaders may issue ultimatums with a minimum of 75%, with large boosts to likelihood at 100% and 150%. As an exception, the Antiking faction can fire as low as 50%, since the Pope may offer to join as a war ally.

List of Factions[edit | edit source]

Faction Notes
Plot claimant.png Install [Character] in [Title]
  • Character must have a claim or an elector-rank title (under Feudal elective or Princely elective)
  • Attacker may call external allies (but not vassals of their former liege)
  • If the revolt leader is also the claimant, uses a modified CB that allows the war to continue under an heir
  • Imprisons the former ruler, if this was their primary title and either: the revolt leader was the claimant or the former ruler was demoted in rank
Plot succ promogeniture.png Succession by Primogeniture in [Title]
  • Rare: only started by AI if they would be heir under Primogeniture
Plot succ seniority.png Succession by Seniority in [Title]
  • Rare: only started by AI if they would be heir under Seniority
Plot succ gavelkind.png Succession by Gavelkind in [Title]
  • High priority
Plot succ feudal elective.png Elective Monarchy in [Title]
  • Changes succession to Feudal elective (for the HRE, Princely elective)
  • Without DLC icon Conclave.pngConclave, requires lowest crown authority (Autonomous Vassals)
  • With Conclave, requires the council to have all voting powers (except in HRE)
  • In HRE: always available, councilors cannot be suppressed by council laws, and somewhat higher priority
  • Usable when liege is a king+ with a vassal antipope
  • Seeks to install the faction leader as the new ruler, depose the antipope, and enact papal investiture
  • The real Pope can be called into the war
Oust Ruler
  • Requires Conclave
  • Liege government must be feudal group and not Chinese imperial
  • Liege must be at least king tier and not a religious head.
  • If the title gets a new holder for any reason, faction members get "+10 Love the New Ruler" and cannot create/join this faction again for 2 years
  • Deposes the ruler in favor of the most popular vassal who is eligible (count+, feudal, adult, not imprisoned, not incapable , not in hiding or in seclusion, not eunuch , and must be male unless succession is fully equal)
  • Enacts two council voting powers
  • Enacts "full council authority"
  • New liege owes favors to all attackers (if the faction fights a war)
  • Changes succession to Gavelkind or Feudal elective
  • Sets "vassal wars" law to "allowed"
Plot lower crown authority.png Lower Crown Authority in [Title]
  • Not available if Conclave DLC is activated
  • Higher priority at higher levels of crown authority
Increase council power.png Increase Council power
  • Requires Conclave
  • Enacts two council voting powers
  • Sets "vassal wars" laws one step toward "allowed"
  • All faction members are prohibited from creating/joining this faction again for 10 years
  • Higher priority at low levels of council power and highly restricted vassal laws
Plot independence.png Independence
  • Different rules from directly declared wars of independence.
  • Priority increased by distance (100, 200, 300, 400), different religion/culture, not de jure, king tier
  • In the Jade Dragon.pngWestern Protectorate, councilors cannot be suppressed by council laws, and high priority when China is unstable
  • On success, every faction member gains independence.
True Believers
  • Event-driven faction for remaining unreformed pagans after a mass conversion
  • Councilors cannot be suppressed by council laws
  • Seeks independence using a special variant of the faction Independence CB
Abrahamic Dissidents
  • Event-driven faction for remaining Abrahamics after a conversion to Hellenism
  • Councilors cannot be suppressed by council laws
  • Seeks to have the Hellenic ruler deposed and executed. The ruler will abdicate to their heir (if the heir is not pagan) or the revolt leader (if the heir is pagan)

Factions and Membership Multipliers[edit | edit source]

The following includes most of the multipliers used by the AI when deciding whether to join a faction. It does not feature the multipliers that the AI considers when initially creating the faction.

Traits[edit | edit source]

  • More likely: Proud (1.5x), Brave (1.5x), Arbitrary (1.5x), Envious (2x), Greedy (2x), Impaler (2x), Deceitful (2x), Ambitious (4x)
  • Less likely: Content (0.01x), Imbecile (0.01x), Inbred (0.1x), Craven (0.1x), Slow (0.2x), Kind (0.5x), Charitable (0.5x), Honest (0.5x), Humble (0.75x), Just (0.75x)

Opinion of Liege[edit | edit source]

  • Succession Factions: >75 (0x, if in faction - to leave)
    • Succession: >50 (0x, if not already in faction)
    • Succession: >25 (0.2x)
  • Crown Authority Faction: >50 (0x, if in faction - to leave)
    • Crown Authority: >25 (0x, if not already in faction)
    • Crown Authority: >5 (0.2x)
    • Crown Authority: <-10 (1.5x)
    • Crown Authority: <-50 (2x)
    • Crown Authority: <-75 (4x)
  • Independence Faction: >80 (0x, if in faction - to leave)
    • Independence: >60 (0x, if not already in faction)
    • Independence: >40 (0.5x)
    • Independence: <0 (1.5x)
    • Independence: <-50 (2x)
    • Independence: <-75 (4x)
  • Claimant Faction: >25 (0.2x)
  • Level of Crown Authority:
    • Crown Authority: 1 (0.1x)
    • Crown Authority: 3 (1.5x), 4 (2.25x)
  • Increase Council power: >50 (0x, if not already in faction)

Distance[edit | edit source]

  • Independence: Vassals lower tier than Kings who have the same religion (or religious group, if the vassal shares culture with the liege) and culture (or culture group, if vassal shares religion with the liege) as their liege, and who are less than 200 distance away from the capital (0x)
    • Independence: <200 distance (0.1x)
    • Independence: >300 distance (1.5x)
    • Independence: >400 distance (2x)

Religion or Culture[edit | edit source]

  • Independence: Same Religion and Culture (0.25x)
  • Independence: Different Religious Group (2x)
  • Independence: Different Cultural Group (1.5x)

Claimant faction membership[edit | edit source]

The key factors are opinion of liege, and opinion difference between the liege and claimant.

Will not join claimant faction:

  • To install women over 40
  • To install a parent of the current ruler
  • To install someone else who has a claim on their titles (and could thus revoke without penalty)
  • To install someone of a different religion
  • To install someone who is blinded , eunuch , incapable , imbecile , or inbred
  • To install themselves, if they are the current heir and the title does not use feudal elective succession
  • If same religion and culture as liege, will not replace a dynast with a non-dynast
  • Against their spouse or child

Claimant factors:

  • Women: 0.7x (except when a woman is considering a faction to install herself)
  • Children: 0.5x below each of 13, 10, or 5
  • Self: 3x
  • Same society: 5x (does this include themself?)
  • Dynasts: 1.5x
  • Born in the purple : 2x for claimant, 0.5x for liege (when the title is Byzantine Empire and the character has byzantine culture)
  • If both the current liege and the claimant are Muslim:
    • Sayyid : 2x if claimant is Sayyid and liege is not
    • Mirza : 1.5 if claimant is Mirza, and liege is neither Sayyid nor Mirza

dynasty_realm_power and the title's "conquest culture" (if any) also play a role.

Personal attributes