Diplomatic actions

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Diplomatic actions both affect diplomatic relations and leverage them for strategic and tactical benefits. See diplomatic modifiers for how each action affects relations.

List of Actions[edit | edit source]

The player civilization can perform several diplomatic actions:

  • Negotiate trades and treaties (see below)
  • Declare war
  • Offer friendship
  • Request that foreign ships leave domestic territory
  • Demand tribute
  • Offer tribute

Treaties[edit | edit source]

Treaties are formalized commitments that have a persistent impact on relations with the other civilization.

Type Effect Min relations Turns since meeting Technology
Peace

End the war with the other civilization.

Alliance

Create an alliance between your two civilizations, vowing to support the ally's side in any war.

9 Unrecognized icon nameGC3 Influence Stat Icon.png Interstellar Alliances
Embargo third-party

Embargo a third party's civilization, refusing the establishment of trade routes and severing existing routes.

Unrecognized icon nameGC3 Influence Stat Icon.png Diplomacy
Declare war on another civilization Declare war on a third party civilization.
Open borders

Allow each other's ships to pass through their respective territories without diplomatic penalty.

-3 1 Unrecognized icon nameGC3 Influence Stat Icon.png Universal Translator
Exploration

Share each other's sight in the fog of war.

2 20 Unrecognized icon nameGC3 Influence Stat Icon.png Universal Translator
Non-aggression pact

Both parties agree not to declare war on each other.

4 Unrecognized icon nameGC3 Influence Stat Icon.png Diplomacy
Cultural

Give +25% Unrecognized icon nameGC3 Influence Stat Icon.png Influence Growth to the both civilizations through the sharing of culture.

3 20 Cultural Treaty
(removed by Retribution.png)
Free trade

Give +25% Unrecognized icon nameGC3 Saving Stat Icon.png Gross Income to both civilizations through the sharing of markets.

3 20 Economic Treaty
(removed by Retribution.png)
Research

Give +25% Unrecognized icon nameGC3 Research Spending Stat Icon.png Research to the both civilizations through the sharing of knowledge.

4 Research Treaty
(removed by Retribution.png)
Military alliance

Special alliance that provides +25% Unrecognized icon nameGC3 S Military Manufacturing Icon.png Ship Construction to both civilizations.

6 20 Military Alliance
(removed by Retribution.png)
Research alliance

Special alliance that provides +25% Unrecognized icon nameGC3 Research Spending Stat Icon.png Research to both civilizations.

6 20 Research Alliance
(removed by Retribution.png)
Culture alliance

Special alliance that provides +25% Unrecognized icon nameGC3 Influence Stat Icon.png Influence Growth to both civilizations.

6 20 Culture Alliance
(removed by Retribution.png)