Auto-Diplomacy And Advanced Subject Management

This mod is compatible with game version 1.13 and can be installed mid-game.
Note that this mod generally doesn’t require updates for new game versions.
All features can be enabled or disabled anytime and only affect player.

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12.05.2026

• Please ensure the installed mod is up-to-date, as it may not be auto-updated sometimes.
• Updated for 1.13.

• Auto-diplomacy will try to improve relations with other countries as long as player has enough influence. It’s similar to the diplomatic macro-builder in EU4.
  Note: except for Auto-Diplomacy, all features can be disabled via a game rule.
• Countries that have friendly diplomatic pacts with player will be given much higher priority. The more populated a country is, the more priority will be given to this country.
• Optional filters for selecting countries:

  Subject Only: only improve relations with our subjects or power bloc junior member.

  Minimum Influence: Auto-Diplomacy will save at least this value of influence.

  Infamy Threshold: if infamy is high (infamy >= 25 or infamy > 0), Auto-Diplomacy will try to use less influence to have the max infamy decaying bonus.

  Exclude Enemies: exclude countries that are damaging the relations with us or are considered as a rival by us.

  Exclude Subjects: exclude other countries’ subjects.

  Min./Max. Relations: exclude countries whose relations with us are lower/higher than this.

• There are two options for Auto-Diplomacy to use the above filters:
  – Start "Improve Relations" actions according to the filters
  – Start and cancel "Improve Relations" actions according to the filters

• It will try to increase the relations with all subjects by paying them (image 2).
• It will stop if the relations reach 50 or overlord’s debt reaches 10%.
• It will start again if the relations drop below 50.

• Exclude a country from Auto-Diplomacy and Auto-Manage Subject Relations by using the diplomatic action "Direct Diplomatic Management" on it.

• Force a subject to conquer a state, annex a subject or nationalize foreign properties.
• There are requirements and effects for game balance, details in image 6.

• Extra diplomatic actions for subject management that are only available to player.
• All actions have requirements and effects vary with autonomy levels for game balance.
• Institutional Reforms
  Force a subject pass certain law templates automatically and gradually.
  The reforms are aiming to make the subject more suitable for investment and provide more workforce.
• Placate The Masses
  Subject won’t have revolutions (not incl. secession) anymore.
  Overlord will pay subject’s pops (not government) to placate them.
  Overlord must have much higher prestige and army projection than the subject.
• Development Aid
  Transfers money and innovation to a subject in return for influence.
• Intervene Economic
  Forbid a subject to change its economic system without permission.
  Subject can only enact a economic system imposed by overlord.
• Take Treaty Port
  Creates a treaty port in a subject’s state.
  Overlord must have less than 2 treaty ports in the same strategic region.
• Borders Delimitation
  Selected split states between two subjects will be merged into one state (image 5).
  It will cause a change of liberty desire of the subjects.
  If the merging annexes one of the subjects, overlord will gain infamy.
• Revoke Claim
  Force a subject to revoke a claim on a state region.
• Take Over Subject’s colonies
  Take over a subject’s colonies when the subject doesn’t have any colonial affairs.
• Spread Primary Cultures
  A similar feature is integrated in game version 1.12. As it requires DLC Iberian Twilight, this requirement will be respected and this feature is removed.
• Force important laws on subjects
  Subject will pass the selected law immediately (image 4).
  Overlord cannot have more backward laws than the selected law.

• Choose important laws for released subjects.
• You need to subscribe this sub-mod first：
  Choose Laws For Released Subjects

• No vanilla files were overwritten, so it should be compatible with most mods.
• Mods that modify laws might affect "Force important laws on subjects".

• English, Chinese.
  Other languages use English text.
• Korean localization by @ABC

Up-to-date mod collection: zw’s Vic3 Mods
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• Auto-Diplomacy And Advanced Subject Management
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