Foreign Relations

This page covers diplomatic actions available to Nations. For interactions between the global Factions, see Diplomacy.

Foreign relations encompass all actions a Nation may take to advance its political interests or of the Faction controlling it, ranging from peaceful diplomacy to open warfare.

Policies

Policies are actions the executive faction of a nation can take to dramatically alter the course of the nation. A councilor can use the Set Policy mission to enact policies.

~ Policies, Terra Invicta Codex, 0.4.90.

In order for a faction to enact a policy in a nation, they must own the executive control point, it must not be disabled, and they must use a councilor to perform a Set National Policy mission in the nation. Many policies require consolidated executive control. Many policies require another nation to agree.

This section loosely summarizes the list of policies, and gives links to sections that discuss the more complex policies in more detail.

Policy	Needs Consolidated Exec?	Can be Rejected?	Ignores Diplomatic Cooldown?	Main Effect
Declare War	No	No	Yes	Allows Terrestrial_Warfare.
Join War	No	No	Yes	Allows Terrestrial_Warfare.
Seek Peace	No	Yes	Yes	Ends the war.
Grant Independence to a New Nation	Yes	No	Yes	Release Regions to form their own Nation.
Grant Independence to a Breakaway Nation	Yes	No	Yes	The Breakaway Nation is no longer a Breakaway.
Declare Independence	No	No	Yes	Nation is no longer a Breakaway and former parent nation declares war.
Demand Territory	Yes	Yes	No	Nation receives target Region.
Leave Federation	Yes	No	Yes	Leaves the Federation.
Federation	Yes	Yes	No	Federates with Target.
Unification	Yes	Yes	No	Merge Nations.
Disband Army	Yes	No	Yes	Disbands a human army that is: Owned by the Nation. Owned by the Faction that owns the executive control point of the Nation. Not in an enemy region.
Disband Warheads	Yes	No	Yes	Remove up to 5 Nuclear Weapons from the nation. If the last Nuclear Weapons is removed also cancel all progress on the Nuclear Weapons Priority.

The Policies tab of the Nation intel window shows the available national policies. Here one can also find the diplomatic cooldown periods for countries, with whom certain diplomatic actions may become available after the timer expires.

This is also where a player can choose to abandon their control points in the nation, which does not require a Set National Policy mission or any Influence cost.

Gaining Regions

One of the fastest ways to improve a nation is to simply gain control over more Regions, taking them from whatever nations previously controlled these Regions. However, Terra Invicta takes place in an era where it is no longer acceptable for nations to arbitrarily expand their territories through mere military might.

Claims

Instead, a nation can only take a region if it has a claim on it. This claim represents a sufficient set of justifications (typically via a combination of historical, ethnic, geographical, and other factors) that the nation can use to argue that its control over a region is acceptable.

Notably, the set of claims that a nation has can grow throughout the course of a campaign. There are several social science projects that add new claims and even new nations. Additional claims can also be acquired via peaceful unifications.

For a list of all claims, see Claim List, 2026 Claim List, or 2070 Claim List.

Hostile Claims

The people of this region generally do not wish to be a part of this nation. This causes lower cohesion rest states in democracies and higher unrest rest states in authoritarian states. After the region is annexed, sufficient investment in the Government or Unity priorities can remove this status.

~ Nation UI Tooltip for Hostile Claims, Terra Invicta, Version RC6.

Claims can be hostile for two reasons:

• Historical: Because of certain historical events, the claim is simply innately hostile. Some of these historically hostile claims simply begin this way, but these hostile claims can also be generated in various ways, such as when acquiring new claims via peaceful unifications.
• Democratic: If the claiming nation's Government is at least 1.5 points lower than the region's current nation's Government score, then the claim becomes hostile.

Claims that are hostile are typically more difficult to annex, and even after annexing, they give penalties to Base Cohesion and/or Base Unrest that is proportional to the fraction of the nation's Population that currently lives in a hostile region.

Specifically, the penalties are:

Base Cohesion Penalty = -1.6 × Hostile Population Fraction × Government

Base Unrest Penalty = 1.6 × Hostile Population Fraction × (10 - Government)

After a hostile claim is annexed, the claim can be made non-hostile after sufficient investment in the Government Priority or the Unity Priority. Specifically, every 200 completions of either priority (added together) will make one hostile claim on an already annexed region into a non-hostile claim. This number is reduced to 100 total completions in the Broken Earth scenario. If there are multiple candidates, then one is selected as follows:

1. Remove all candidates that are not adjacent to any non-hostile region that also belongs to the nation, unless this would remove all candidates.
2. Pick the candidate with the highest Population.

Note: In this context, adjacency includes even connections that are only open to friendly Armies.

Alien-Related SPOILERS INSIDE!
The Alien Nation always has a non-hostile claim on every region of earth.

Methods for Transferring Regions

The following subsections discuss each of the possible methods by which a nation can gain control over more regions.

Grant Independence

Once a faction has consolidated executive control over a nation X, it may perform a Set National Policy councilor mission in the capital region of X to grant independence to a human nation Y with no regions if the following are true:

• Y has a claim on its desired capital region.
• The desired capital region of Y is not currently the capital region of X.
• X currently controls the desired capital region of Y.

When this national policy is passed, the desired capital region of Y will be transferred from X to Y. In addition, the following effects also occur after the region is transferred:

1. If X has founded a military, then Y also founds a military, if it hadn't already.
2. If X has a complete spaceflight program, then Y also completes a spaceflight program, if it hadn't already.
3. The Government and Cohesion of Y is set to those of X.
4. The public opinion of Y is randomized via repeated applications of Propaganda towards random ideological coordinates. The strength and number applied decreases with the Cohesion of Y, with 10 Cohesion having no randomization at all.
5. If X has less than 5 Cohesion, then reduce Unrest in X by (0 to 3) × Fraction of Population that X gave to Y.
6. If X has less than 5 Cohesion, then reduce Unrest in Y by 0 to 3.
7. Increase Cohesion in X by (0 to 2) × Fraction of Population that X gave to Y.
8. Increase Cohesion in Y by 1 to 3.
9. Every rival of X also becomes a rival of Y.
10. Every ally of X also becomes an ally of Y.
11. X and Y become allies.
12. X and Y are put on a diplomatic cooldown of 180 days with each other.

Note: It is also possible to grant independence to Breakaway nations, but no regions are transferred when this happens, so that is not discussed in this subsection. That is instead discussed in Foreign_Relations#Granting_Independence.

Cede Territory

This mechanic has been removed. It has been replaced by the Demand Territory policy.

OBSOLETE INFO INSIDE!

Once a faction has consolidated executive control over a nation X, it may perform a Set National Policy councilor mission in the capital region of X to cede territory to a human nation Y if the following are true: Either Y is not a rival of X, or X and Y can improve their relations (they are not on a diplomatic cooldown). Y has a claim on a region controlled by X that is not currently the capital region of X. When this national policy is passed, every non-capital region of X that Y has a claim on will be transferred to Y. In addition, X and Y will be put on a diplomatic cooldown of 90 days.

Demand Territory

Once a faction has consolidated executive control over a nation X, it may perform a Set National Policy councilor mission in the capital region of X to demand a region R from another nation Y if the following are true:

• X has a non-hostile claim on R.
• R is not the capital region of Y.
• The executive of Y is empty or the faction that owns this executive has consolidated executive control.
• Y is not in any war.
• X and Y can improve their relations (they are not on a diplomatic cooldown).
• X and Y are either not Rivals or can end their rivalry.
  • This means neither can be a breakaway of the other. Because breakaway nations are permanently Rivals with their parent.

When this national policy is passed:

• The region R is transferred from Y to X.
• If X and Y were Rivals, then they end their rivalry.
• X and Y are put on a diplomatic cooldown of 90 days.

Peaceful Unification

Once a faction has consolidated executive control over a nation X, it may perform a Set National Policy councilor mission in the capital region of X to peacefully unify with (absorb) a human nation Y if one of the following sets of conditions are true:

1. • X and Y are in the same Federation.
     Note: X does not need to be the federation leader or have the federation named after it.
   • X has a non-hostile claim on the desired capital region of Y.
   • X and Y can improve their relations (they are not on a diplomatic cooldown).
   • The faction has consolidated executive control over Y.
   • The faction owns all control points of Y.
2. • Y is a Breakaway nation of X.
   • X is not at war with Y.
   • The faction owns all control points of Y.
3. • X is a Breakaway nation of Y.
   • X is not at war with Y.
   • The faction owns all control points of X.
   • The faction owns the executive control point of Y.

The third case functions pretty much identically to the second case, except that the faction is setting the policy in the other nation.

In the first two cases, when this national policy is passed, every region of Y will be transferred to X. In addition, the following effects also occur after the regions are transferred:

1. If X has completed a nuclear weapons program, then all of Y's Nuclear Weapons are given to X. Otherwise the Nuclear Weapons of Y simply disappear.
2. If neither X nor Y have completed a nuclear weapons program, then 50% of Y's Develop Atomic Bomb Priority progress is added to X's Develop Atomic Bomb Priority progress, but the total sum is capped at 1 IP less than the cost of the Develop Atomic Bomb Priority.
3. If Y has completed a spaceflight program but X has not, then X completes a spaceflight program.
4. If neither X nor Y have completed a spaceflight program, then 50% of Y's Found Space Program Priority progress is added to X's Found Space Program Priority progress, but the total sum is capped at 1 IP less than the cost of the Found Space Program Priority.
5. If Y has founded a military but X has not, then X founds a military.
6. If neither X nor Y have founded a military, then 50% of Y's Found Military Priority progress is added to X's Found Military Priority progress, but the total sum is capped at 1 IP less than the cost of the Found Military Priority.
7. For each other national priority, 50% of Y's priority progress is added to X's priority progress.
8. All of Y's Funding is transferred to X.
9. If the Government of X is less than (the Government of Y - 1), then the Unrest of X is increased by (the difference in their Government / 2), but capped at 9.8 total Unrest.
10. If Y had any Breakaway nations, then they are all peacefully granted independence from Y.

See Peaceful Unification List and Full Unification List for a more detailed analysis of how each nation can increase its claims through peaceful unifications.

Daily Check for Secession to Non-Extant Nations

Every day at 10:30am, every human nation Y that currently does not have any regions will attempt to create itself by breaking away from the nation X that controls the desired capital region of Y. But this attempt only succeeds if all of the following conditions are true:

• X has at most 3 Cohesion.
• X has at least 6 Unrest.
• The desired capital region of Y is not the current capital region of X.
• A P% chance roll is passed, where P is calculated as follows:
  1. Set P to (the Unrest of X / 2 - the Cohesion of X / 4 - the Government of X).
  2. If X's claim on the region is hostile, then multiply P by 3.
  3. If there are Armies in the desired capital region of Y and X has less than 8 Government, then divide P by 20 × the number of Armies in the desired capital region of Y.
  4. Divide P by 75.

If the attempt succeeds, then the desired capital region of Y is transferred from X to Y. Furthermore, for each non-capital region of X that is non-hostile claimed by Y and has no Armies, there is a Q% chance that the region will also be transferred to Y, where Q is (the Unrest of X × 6 - the Cohesion of X × 3 - the Government of X × 3).

In addition, the following effects also occur after the regions are transferred:

1. The Government and Cohesion of Y is set to those of X.
2. The armies of Y are disbanded.
3. Y becomes a Breakaway nation of X if X is not a Breakaway of another nation.
4. All of Y's control points are given to whichever faction raised the most unrest in X.
5. Increase Cohesion in Y by 0 to 3.
6. Set Unrest in Y to a random value between 0 and 4 inclusive.
7. Increase Government in Y by (-2 to 0 + the Education of Y / 2.25).
8. Reduce Miltech in Y by 0 to 0.5.
9. Increase Inequality in Y by -1 to 1.
10. Reduce Unrest in X by (0 to 6) × Fraction of Population that X gave to Y.
11. Increase Cohesion in X by (1 to 3) × Fraction of Population that X gave to Y.
12. X and Y become rivals if either the Government of X is less than 7 or some faction raised unrest in X.

Periodic Check for Secession to Neighboring Nations

Every 4 days at 10:30am, every human nation X will check if it should undergo a revolution or an organic coup. If not, then each non-capital region R of X will make an attempt to secede for each adjacent non-allied nation Y that has a non-hostile claim on R. But R's attempt to secede to Y only succeeds if all of the following conditions are true:

• X has at most 3 Cohesion.
• X has at least 6 Unrest.
• If Y is the Alien Nation, then The Servants have at least 50% public support in X.
• A P% chance roll is passed, where P is calculated as follows:
  1. Set P to (the Unrest of X - the Cohesion of X / 2 - the Government of X).
  2. If X's claim on R is hostile, then multiply P by 3.
  3. If there are Armies in R and X has less than 8 Government, then divide P by 20 × the number of Armies in R.
  4. Divide P by 75.
  5. If Y is the Alien Nation and R has at least 50 Xenoflora Growth Levels, then add (the Xenoflora Growth Levels in R / 100) to P.

If the attempt succeeds, then the region R is transferred from X to Y. In addition, the following effects also occur:

• Increase Cohesion in Y by 0 to 2.
• Reduce Unrest in X by (0 to 6) × Fraction of Population that X gave to Y.
• Increase Cohesion in X by (1 to 3) × Fraction of Population that X gave to Y.
• X and Y become rivals if either the Government of X is less than 7 or some faction raised unrest in X via Increase Unrest missions.

Note: If a region has multiple different nations that it can secede to, then it will make an attempt for each one of them in descending order of Government.

Post-Unrest Secession Check

Every time a councilor from a faction F successfully performs an Increase Unrest mission on a non-capital region R of a nation X, each human nation Y that currently does not have any regions and whose desired capital region is R will attempt to create itself by breaking away from X. This applies even if Y's claim on R is hostile. This attempt has a P% chance to succeed, where P is calculated as follows:

1. Set P to 1000.
2. If the mission was a critical success, then multiply P by 10.
3. Divide P by the number of mission phases per month.
4. If F has researched Freedom Fighters, then multiply P by 1.5.
5. If F researched a project that gave Y its claim on R, then multiply P by 3.
6. Multiply P by (the Unrest of X - the Cohesion of X / 2).
7. Subtract the Government of X from P.
8. If X's claim on R is hostile, then multiply P by 3.
9. If there are armies in R and the Government of X is less than 8, then divide P by 20 × the number of armies in R.
10. Divide P by 300.

If the attempt succeeds, then the region R is transferred from X to Y. Furthermore, for each non-capital region of X that is non-hostile claimed by Y and has no armies, there is a Q% chance that the region will also be transferred to Y, where Q is calculated as follows:

1. Set Q to 1000.
2. If the mission was a critical success, then multiply Q by 10.
3. If F has researched Freedom Fighters, then multiply Q by 1.5.
4. Divide Q by the number of mission phases per month.
5. If F researched a project that gave Y its claim on R, then multiply Q by 3.
6. Multiply Q by (the Unrest of X × 2 - the Cohesion of X - the Government of X).
7. If X's claim on this region is hostile, then set Q to 100.

In addition, the following effects also occur:

• Y becomes a Breakaway nation of X if X is not a Breakaway of another nation.
• All of Y's control points are given to faction F.
• Increase Cohesion in Y by 0 to 3.
• Set Unrest in Y to a random value between 0 and 4 inclusive.
• Increase Government in Y by (-2 to 0 + the Education of Y / 2.25).
• Reduce Miltech in Y by 0 to 0.5.
• Increase Inequality in Y by -1 to 1.
• Reduce Unrest in X by (0 to 6) × Fraction of Population that X gave to Y.
• Increase Cohesion in X by (1 to 3) × Fraction of Population that X gave to Y.
• X and Y become rivals.

War Annexation

A human Army can perform an Annex Region operation on a region R owned by a nation X if:

• The army is not in battle.
• The army has at least 80% health remaining.
• Region R is not already being annexed by a different army.
• The army's home nation is at war with X.
• R is not the capital region of X.
• R is fully occupied by a war alliance that includes the home nation of the army.
• One of the following is true:
  • The home nation of the army has a (possibly hostile) claim on R.
  • There is a human nation Y that currently does not have any regions and whose desired capital region is R.

Note: Starting the Annex Region operation will usually result in the nation X (or a war ally) launching a nuke at the army, if they have any.

The duration of the Annex Region operation is D days, where D is calculated as follows:

1. Set D to (the Population of R / the average Population per region at the start of the game) ^ 0.75.
2. Add (the area of R in km^2 / the median area of a region in km^2) ^ 0.5 to D.
3. Multiply D by 45.
4. If R is rugged, then multiply D by 1.25.
5. Cap D between 45 and 270.
6. Multiply D by the Miltech of X.
7. Divide D by the Miltech of the army's home nation.

If the home nation of the army has a claim on R, then the only thing that happens when the Annex Region operation completes is:

1. Every human army whose home region is R is disbanded.
2. R is transferred from X to the army's home nation.

Otherwise, when the Annex Region operation completes, R is transferred to the human nation Y that currently does not have any regions and whose desired capital region is R. In addition, the following effects also occur:

• Y and the home nation of the annexing army become allies.
• Y becomes a Breakaway nation of X if X is not a Breakaway of another nation.
• All of Y's control points are given to the faction that owns the army that did the Annex Region operation.
• Increase Cohesion in Y by 0 to 3.
• Set Unrest in Y to a random value between 0 and 4 inclusive.
• Increase Government in Y by (-2 to 0 + the Education of Y / 2.25).
• Reduce Miltech in Y by 0 to 0.5.
• Increase Inequality in Y by -1 to 1.
• Reduce Unrest in X by (0 to 6) × Fraction of Population that X gave to Y.
• Increase Cohesion in X by (1 to 3) × Fraction of Population that X gave to Y.
• X and Y become rivals if either the Government of X is less than 7 or some faction raised unrest in X.
• X declares war on Y, if able.

War Conquest

When an army completes the occupation of the capital region of a human nation X, the game first checks which of the war alliances against X contributed the most to the occupation of the capital region of X. This war alliance is considered the occupying alliance, and the nation that leads this war alliance is considered the lead occupier.

The list of nations in the occupying alliance is then sorted such that:

• The Lead Occupier is set to go first.
• The other nations are sorted in descending order by how much they contributed to the occupation of the capital region of X.
• Nations that contributed the same amount are sorted in descending order by their Estimated Military Strength.

Then, one by one, each nation Y in the ordering will grab every remaining region R of X that Y has a claim on (even if it is hostile): every human army whose home region is R is disbanded, and then R is transferred from X to Y.

In the end, if X has no remaining regions, then the now zero-region X is unified into the nation that took the capital region of X.

Otherwise, if X has any remaining regions, then the control points of X are given to the human faction that owns the executive control point of the lead occupier. If no such human faction exists, then the control points of X are given to a faction F that is determined as follows:

1. Each human faction starts with a score of 0.
2. Look at the set of all human-faction-owned armies whose home nations were at war with X and are still within the remaining regions of X. For each such army:
   1. Look at its home nation's Miltech, add in the Miltech bonuses from Councilors doing Advise missions on the home nation and from military habs in earth interface orbit.
   2. Multiply the total Miltech by the remaining health % of the army.
   3. Add this value to the score of the human faction that owns this army.
3. If no such army exists, then the faction F is the undecided faction, and the control points of X are simply emptied out.
4. Otherwise, the human faction with the highest score is chosen to be the faction F that takes over the control points of X.

In addition, the following effects are applied:

1. X is removed from all wars that it is involved in.
2. X ends all alliances with nations that are at war with the lead occupier.
3. X ends all rivalries with all members of the occupying alliance and all allies of the lead occupier.
4. X initiates an alliance with all members of the occupying alliance.
5. If any member of the occupying alliance is a Breakaway nation of X, it is peacefully granted independence from X.
6. The Unrest of X is increased by some amount U, calculated as follows:
   1. Set U to be the fraction of the remaining regions of X that were fully occupied when the capital region of X was conquered.
   2. Multiply U by -6.
   3. Add (4 + the number of remaining armies of X) to U.
   4. If the faction F that takes over the control points of X has researched Psyops, then subtract 3 from U.
   5. If the faction F that takes over the control points of X has researched Networked Psyops, then subtract 3 from U.
   6. If the faction that owned the executive control point of X before F took over has researched Guerrilla Warfare, then add 3 to U.
   7. If U is positive, then:
      • If F is a human faction that owns the executive control point of the lead occupier, then multiply U by (1 - public support fraction for F in X).
      • Otherwise, multiply U by (1 - public support fraction for (the most popular human faction in the lead occupier) in X).
   8. If F is a human faction, then subtract (0.25 × number of times F raised unrest in X) from U.
   9. Add a random value between -1 and 1 inclusive to U.
7. The Cohesion of X is decreased by 0 to 3.
8. The Government of X is decreased by 0 to 0.5.
9. If the Government of X is still at least 5 and the Government of the lead occupier is less than the Government of X, then the Government of X is decreased by 25% to 75% of the difference between their Government scores.
10. All records of which factions raised unrest in X are deleted.

Alien Related

Alien Related SPOILERS INSIDE!

Conquering Non-Capital Regions for the Alien Nation When an army whose home nation is the Alien Nation completes the occupation of a non-capital region R of a human nation X, the region R is simply transferred from X to the Alien Nation. If this results in the creation of the Alien Nation, then it can trigger a massive shift in inter-faction relationships, as humanity recognizes the growing threat that is now in their midst. Conquering Regions from the Alien Nation when it has more than one Region When an army completes the occupation of a region R of the Alien Nation such that R is not the only region of the Alien Nation, the region R will be transferred from the Alien Nation to a human nation Y that has a claim on R. To determine which human nation Y should receive R, the game first checks which of the war alliances against the Alien Nation contributed the most to the occupation of R. This war alliance is considered the occupying alliance, and the nation that leads this war alliance is considered the lead occupier. Each nation in the occupying alliance is then sorted in descending order by how much they contributed to the occupation of R, except the lead occupier is set to go first even if it didn't contribute anything. The first nation in this ordering that has a claim on R is chosen as the human nation Y that region R is transferred to. If no such nation exists, then a second ordering is created, consisting of every ally of the lead occupier, sorted in descending order by their estimated military strength. The first nation in this ordering that has a claim on R is chosen as the human nation Y that region R is transferred to. If no such nation exists, then the game creates a list of every human nation: that has a claim on R. whose last capital region is R. Then a random one is chosen as the human nation Y that region R is transferred to. If no such nation exists, then the game creates a list of every human nation: that has a claim on R. that is adjacent to R. whose executive control point is owned by some human faction. whose executive control point is owned by the same faction that owns the executive control point of the lead occupier. Then a random one is chosen as the human nation Y that region R is transferred to. If no such nation exists, then the game creates a list of every human nation: that has a claim on R. that is adjacent to R. Then a random one is chosen as the human nation Y that region R is transferred to. If no such nation exists, then the game creates a list of every human nation: that has a claim on R. whose executive control point is owned by some human faction. whose executive control point is owned by the same faction that owns the executive control point of the lead occupier. Then a random one is chosen as the human nation Y that region R is transferred to. If no such nation exists, then the game creates a list of every human nation: that has a claim on R. Then a random one is chosen as the human nation Y that region R is transferred to. Note that this time, the nation is guaranteed to exist, since every region in the game is claimed by at least one human nation. In addition to transferring the region R from the Alien Nation to Y, the following effects occur: If Y has no regions other than R, then the lead occupier and all allies of the lead occupier that are also at war with the Alien Nation make an alliance with Y. If Y has no regions other than R, then the control points of Y are given to the human faction that owns the executive control point of the lead occupier. If no such human faction exists, then the control points of Y are simply emptied out. If Y has no regions other than R, then the Alien Nation declares war on Y. If R was the capital region of the Alien Nation before it was transferred to Y, then the following additional effects occur: The faction that owns the army that occupied R: Has a 10% chance to complete the Access Alien Tech milestone. Has a 2% chance to complete the Access Hydra Corpus milestone. Has a 2% chance to complete the Access Live Salamander milestone. If it fails that 2% chance, then it has a 5% chance to complete the Access Salamander Corpus milestone. Has a 10% chance to complete the Access War Dog Corpus milestone. Unrest in the Alien Nation is increased by 1. A special Post-Unrest Secession Check is performed for every remaining region in the Alien Nation except for its new capital region. This check is special in the following ways: The responsible faction F is the faction that owns the army that occupied R. The first three steps of computing P are replaced by setting P to 10000 × the Unrest in the Alien Nation. Conquering the Last Region from the Alien Nation When an army completes the occupation of the last region R of the Alien Nation, the game first checks which of the war alliances against the Alien Nation contributed the most to the occupation of R. This war alliance is considered the occupying alliance, and the nation that leads this war alliance is considered the lead occupier. Each nation in the occupying alliance is then sorted in descending order by how much they contributed to the occupation of R, except the lead occupier is set to go first even if it didn't contribute anything. Every human army whose home region is R is disbanded, and then R is transferred from the Alien Nation to the first nation in the ordering that has a claim on R, if any exist. Then the Alien Nation is overthrown. Causing Revolutions in the Alien Nation Each nation is periodically checked for whether it should undergo a revolution. When a revolution occurs in the Alien Nation, the following steps occur: The Public Support factor is calculated as the fraction of the public that supports The Protectorate + 2 × the fraction of the public that supports The Servants in the Alien Nation. Note: If The Protectorate does not exist due to custom campaign settings, the Public Support factor is calculated as 3 × the fraction of the public that supports The Servants in the Alien Nation. Unrest in the Alien Nation decreases by (the Public Support factor × (0.8 to 1.2) + 2), capped between 3 and 6. Cohesion in the Alien Nation increases by (the Public Support factor × (0.8 to 1.2)), capped at 3. If Inequality in the Alien Nation is more than 2.5, then Inequality in the Alien Nation decreases by (the Public Support factor × (0.8 to 1.2) × (Inequality / 2.5 - 1)), capped at 3. The Alien Nation is overthrown. Overthrowing the Alien Nation When the Alien Nation is overthrown, the following steps occur: For each remaining region R in the Alien Nation: R takes a random amount of damage between 0% and 25%, multiplied by 2 if R is the capital region. If there is any human nation whose last capital region is R, then a random one is selected and marked to receive R. Otherwise: Let Y be a random human nation that has a claim on R, but each human nation whose executive control point is owned by The Academy, The Protectorate, or The Servants is 1/100 times as likely to be picked as Y. If R is the capital region of the Alien Nation or a 50% chance roll succeeds, then mark Y to receive R. For each human nation Y that is marked to receive regions from the Alien Nation: If Y has no regions and the Alien Nation was overthrown by a conquering alliance in war, then Y initiates an alliance with every member of the conquering alliance. Transfer all regions that Y is marked to receive from the Alien Nation to Y. If the Alien Nation was overthrown by a revolution, then assign the control points of Y to the factions that raised the most unrest in the Alien Nation, in exactly the same way as a revolution in a human nation would assign control points to unrest-raising factions. If the Alien Nation was overthrown by a revolution, then Unrest in Y is decreased by 5. If the Alien Nation was overthrown by a conquering alliance in war, then assign all control points of Y to the faction that owns the executive control point of the lead occupier. The Aliens gain 80 hate divided up among the human factions responsible for overthrowing it. Factions with greater responsibility receive a larger share of the 80 hate. If the Alien Nation still has remaining regions, then Unrest in the Alien Nation is decreased by (the number of regions transferred away from the Alien Nation), capped between 5 and 10.

Effects of Transferring Regions

Whenever a region R is transferred from a nation X to a nation Y by any method, the following steps occur:

1. The region GDP of R is removed from X.
2. If R is the capital region of X and X has other regions, then the capital of X moves to one of its remaining regions (whichever has the most Population).
3. The region R is removed from X. (This removes the Population of R from X.)
4. The Miltech of nation Y is set to the weighted average of the Miltechs of X and Y, where the weight of:
   • X is the sum of:
     • 1
     • +1 if there is a human army whose home region is R
     • +1 if that human army has a navy attached.
   • Y is the sum of:
     • The number of Regions owned by Y (excluding R) × 2
     • The number of armies owned by Y
     • The number of navies owned by Y.
5. The region R is added to Y. (This adds the Population of R to Y.)
6. If R was a colony region or a mining region (note: not an oil region), then the Inequality of X decreases by 0.25 while the Inequality of Y increases by 0.25. Both of these Inequality changes are affected by the Population Scaling of their respective nations.
7. If R is the desired capital region of Y, then the capital of Y moves to R.
8. The GDP that was removed from X earlier is now added to Y.
9. The Pollution Multiplier of Y is set to the weighted average of the Pollution Multipliers of X and Y, where the weight of:
   • X is the GDP added to Y divided by the total GDP of Y including the addition.
   • Y is (1 - the weight of X).
10. The Education of Y is set to the weighted average of the Educations of X and Y, where the weight of:
    • X is the Population of R divided by the total Population of Y including R's added Population.
    • Y is (1 - the weight of X).
11. The Unrest of Y is set to the weighted average of the Unrests of X and Y, where the weight of:
    • X is the Population of R divided by the total Population of Y including R's added Population.
    • Y is (1 - the weight of X).
12. The Cohesion of Y is set to the weighted average of the Cohesions of X and Y, where the weight of:
    • X is the Population of R divided by the total Population of Y including R's added Population.
    • Y is (1 - the weight of X).
13. The Cohesion of Y is reduced by 0.25. Note: If cohesion is reduced below zero, Government and Unrest values are changed. See Underflowing Cohesion for details.
14. The Inequality of Y is set to the weighted average of the Inequalities of X and Y, where the weight of:
    • X is the Population of R divided by the total Population of Y including R's added Population.
    • Y is (1 - the weight of X).
15. The Public Opinion of Y is set to the weighted average of the Public Opinions of X and Y, where the weight of:
    • X is the Population of R divided by the total Population of Y including R's added Population.
    • Y is (1 - the weight of X).
16. The human army whose home region is R (if any) is assigned to one of Y's control points.
17. If the region R has Space Defenses but the nation Y cannot build Space Defenses, then the Space Defenses of R are removed.

Whenever a set of regions are transferred from X to Y, the game simply transfers each region sequentially. After which, the following effects are applied:

• If Y did not have any regions before the set of transfers, then all colony regions transferred to Y are decolonized.
• Otherwise, the game records the GDPPC of Y before the set of transfers.
  • For each colony region R that is transferred from X to Y, if the region GDPPC that R had before the transfer is higher than (0.667 × this recorded GDPPC value), then R is decolonized.
  • For each non-colony region R that is transferred from X to Y, if R was originally a colony region of Y at the start of the game, R did not get decolonized by the Welfare Priority, and the region GDPPC that R had before the transfer is lower than (0.667 × this recorded GDPPC value × 1.25 if R is a resource region), then R is recolonized.
• Y gains a claim on every region transferred to Y.
  • If Y did not previously have a claim on this region, then the new claim is hostile.
• If Y had any regions before the set of transfers, and X had more than 1.5 more Government than Y, then Y's claim on every transferred region becomes hostile.
• If X no longer has any regions after the set of transfers, then:
  • All contributions by X to region occupations are removed.
  • X is removed from all wars it is involved in.
  • All alliances and rivalries with X are ended.
  • All Breakaway nations of X are peacefully granted independence.
  • X is removed from its federation, if it was in one.
  • All records of which Factions raised unrest in X are deleted.
  • All diplomatic cooldowns with X are removed.

Diplomatic Relations

Relations view
Nation flags in the list of allies and rivals can be mouseover-ed to bring up a tooltip with details on possible policy actions and their requirements.

The Relations tab describes the relationships between this nation and other nations.

Allies are nations that will support this nation when attacked, and may hold a policy vote to join in a war started by this nation. Allies may host one another's armies, as well.

Rivals are nations with which this nation may go to war.

Changes in relations between nations are accomplished by policy votes, which may be initiated by a councilor or by the nation itself.

~ Nation UI Tooltip for Relations, Terra Invicta, 0.4.90.

Relations between a pair of nations can be in one of four states, which are from best to worst:

1. Ally
2. Neutral
3. Rival
4. War

A pair of nations can also be federated, which forces the ally relation between them.

A pair of nations can also have one be a Breakaway nation of the other, which forces the rival relation between them.

Changes in relations often trigger diplomatic cooldowns between nations that must be waited out before relations between them can be improved.

The faction responsible for the change in relation can reduce the diplomatic cooldown duration by researching the Corridor Diplomacy, Common Cause, and Crisis Diplomacy projects, which each multiply the duration by 0.8, compounding. If the faction responsible is the Aliens, the diplomatic cooldown duration is multiplied by 0.25.

Alliances

Effects

• Being allied is one of the requirements for Federating.
• Certain councilor missions become easier to perform in allied nations.
• War-capable allies can join, deter, or prevent wars.

Proposing Alliances

Any nation X can propose an alliance with any other nation Y if all of the following conditions are true:

• Y has at least one region.
• X and Y are not at war.
• X and Y are not rivals.
• X and Y are not already allies.
• X and Y are not on diplomatic cooldown.
• X is not allied to any Breakaway nation of Y.
• Y is not allied to any Breakaway nation of X.
• X is not allied to a nation that Y is a Breakaway nation of.
• Y is not allied to a nation that X is a Breakaway nation of.
• One of the following is true:
  • X has more than 2 control points.
  • Y has more than 2 control points.
  • X has a claim on some region of Y.
  • Y has a claim on some region of X.
  • X and Y are adjacent.
  • X has a navy.
  • Y has a navy.

The faction that controls the executive control point of X has to pay 10 Influence to propose an alliance with Y, but does not need to use a councilor to do so.

The faction that controls the executive control point of Y gets to decide whether to accept or reject the proposal:

• If the proposal is rejected, then X and Y are put on a diplomatic cooldown of 60 days.
• If the proposal is accepted, then X and Y are allied, and are put on a diplomatic cooldown of 90 days.

Ending Alliances

Any nation X can end an alliance with any other nation Y if all of the following conditions are true:

• X and Y are allies.
• X and Y are not in the same federation.

The faction that controls the executive control point of X has to pay 10 Influence to end an alliance with Y, but does not need to use a councilor to do so.

This ending of an alliance cannot be rejected by anyone.

X and Y are put on a diplomatic cooldown of 90 days after X ends its alliance with Y.

Rivals

Effects

• Being rivals is one of the requirements for Declaring War.
• Certain councilor missions become harder to perform in rival nations.
• May increase Base Cohesion.

Initiating Rivalries

Any nation X can initiate a rivalry with any other nation Y if all of the following conditions are true:

• Y has at least one region.
• X and Y are not at war.
• X and Y are not already rivals.
• X and Y are not allies.
• One of the following is true:
  • X has more than 2 control points.
  • Y has more than 2 control points.
  • X has a claim on some region of Y.
  • X and Y are adjacent.
  • X has a navy.

The faction that controls the executive control point of X has to pay 10 Influence to initiate a rivalry with Y, but does not need to use a councilor to do so.

This initiation of a rivalry cannot be rejected by anyone.

X and Y are put on a diplomatic cooldown of 90 days after X initiates a rivalry with Y.

Ending Rivalries

Any nation X can propose ending a rivalry with any other nation Y if all of the following conditions are true:

• X and Y are rivals.
• X and Y are not at war.
• X is not a Breakaway nation of Y.
• Y is not a Breakaway nation of X.
• Y is not allied to a nation that X is a Breakaway nation of. (Not Mirrored??)
• Y is not allied to a Breakaway nation of X. (Not Mirrored??)

The faction that controls the executive control point of X has to pay 10 Influence to propose ending a rivalry with Y, but does not need to use a councilor to do so.

The faction that controls the executive control point of Y gets to decide whether to accept or reject the proposal:

• If the proposal is rejected, then X and Y are put on a diplomatic cooldown of 60 days.
• If the proposal is accepted, then X and Y end their rivalry, and are put on a diplomatic cooldown of 90 days.

Breakaway Nations

■■■■■ is a de facto autonomous state whose nationhood is not recognized by the nation that claims its territory, ■■■■■. It is in a permanent rivalry with that nation. It will function as an independent nation with some limitations: it cannot declare or join wars, or join federations. It may declare independence, ending its breakaway status but allowing the parent nation to declare war. Allies will have the option to participate in the war. Any allies of this nation will also enter into a rivalry with the parent nation.

~ Nation UI Tooltip for Breakaway Nations, Terra Invicta, 0.4.90.

When the game starts there are four breakaway nations - Taiwan, Palestine, South Yemen, and Somaliland. Additional breakaway nations can be created via secession movements, liberations in wars, and peaceful unifications into non-democratic nations.

Granting Independence

Any nation X can grant independence to any nation Y that is a breakaway nation of X.

The faction that has consolidated executive control of X must send a councilor to perform a Set National Policy mission in X to grant independence to Y.

This granting of independence cannot be rejected by anyone.

When X grants independence to Y, Y will no longer be a Breakaway Nation of X, and X and Y will end their rivalry.

Declaring Independence

Any breakaway nation X can declare independence from its parent nation Y.

The faction that owns the executive control point of X must send a councilor to perform a Set National Policy mission in X to declare independence from Y.

This declaration of independence cannot be rejected by anyone.

When X declares independence from Y, X will no longer be a breakaway nation of Y, and Y will be automatically forced to declare war on X.

Federations

Federations are groupings of closely aligned nations that are pledged to provide mutual defense and share space program funding and boost. Members also receive a bonus to investments in the Economy priority. They are led by the member nation with the most significant international ambitions (claims).

To join a federation, a nation must have claims on its territory by at least one of the federation's member nations, be allied with one of the members, and has secured normalized relations with all other members.

Nations may apply to join a federation using the Set Policy mission; the lead nation will approve or disapprove the request. The lead nation may also invite qualifying nations to join.

~ Nation UI Tooltip for Federations, Terra Invicta, 0.4.90.

Some federations are present at the start of the game, while others can be created. Creating a federation requires certain techs and political control of the founding nation.

Effects

• Being part of the same federation is one of the requirements for a peaceful unification.
• Federation members are all forcefully allied to one another.
• Federation members share Boost and Funding: each member's share is proportional to (the number of its control points) ^ 3.
• Federation members can build Boost and Mission Control if any member has completed a Spaceflight Program.
• Certain councilor missions become easier to perform in other federation members.
• Federation members receive an Economy Priority bonus of (total GDP of other federation members in billions ^ 0.25 / 2)%, rounded to the nearest 1%. This also affects the cost of Direct Investments into the Economy Priority.

Joining Federations

Any nation X can propose joining in federation with any other nation Y if all of the following conditions are true:

• X has at least one region.
• X is not a Breakaway nation.
• X is not in a federation or X is the leader of its federation.
• Y has at least one region.
• Y is not a Breakaway nation.
• Y is not in a federation or Y is the leader of its federation.

  Note: If Y is not the leader of its federation, X can still federate with Y, but it has to ask the leader of Y's federation, not Y.

• If X is not in a federation but Y is the leader of a federation F, then:
  • Some member of F is allied with X and not on diplomatic cooldown with X.
  • No member of F has a rivalry with X.
  • No member of F is at war with X.
  • Some member of F has a claim on some region of X, or X has a claim on some region of some member of F.
  • Every member of F that is not already allied with X is able to propose an alliance with X.

• If X is not in a federation and Y is not in a federation, then:
  • X and Y are allies.
  • X has a claim on some region of Y or Y has a claim on some region of X.
  • X and Y are not on diplomatic cooldown.
  • Some faction has consolidated executive control of Y.

• If X is the leader of a federation F, then:
  • Y is not in a federation.
  • Some faction has consolidated executive control of Y.
  • Some member of F is allied with Y and not on diplomatic cooldown with Y.
  • No member of F has a rivalry with Y.
  • No member of F is at war with Y.
  • Some member of F has a claim on some region of Y, or Y has a claim on some region of some member of F.
  • Every member of F that is not already allied with Y is able to propose an alliance with Y.

The faction that has consolidated executive control of X must send a councilor to perform a Set National Policy mission in X to propose joining in federation with Y.

The faction that controls the executive control point of Y gets to decide whether to accept or reject the proposal:

• If the proposal is rejected, then X and Y are put on a diplomatic cooldown of 60 days.
• If the proposal is accepted, then X and Y are federated, and are put on a diplomatic cooldown of 360 days. Furthermore:
  • If X joined a federation that Y was the leader of, then X is allied to and put on a diplomatic cooldown of 360 days with all other federation members.
  • If Y joined a federation that X was the leader of, then Y is allied to and put on a diplomatic cooldown of 360 days with all other federation members.

Leaving Federations

Any nation X can leave a federation F if all of the following conditions are true:

• X has at least one region.
• X is in the federation F.
• X is not the leader of F.

The faction that has consolidated executive control of X must send a councilor to perform a Set National Policy mission in X to leave the federation F.

This leaving of a federation can be rejected by the federation leader if that leader has less than 4 Government.

X is put on a diplomatic cooldown of 720 days with all other members of F after X leaves F.

Examples of Federations

2022 / 2026 scenario start:

• Eurasian Union: Russia (leader), Armenia, Belarus, Kazakhstan, Kyrgyzstan.
• European Union: France (leader), Austria, Belgium-Luxembourg, Bulgaria, Croatia, Czechia, Denmark, Estonia. Finland, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Netherlands, Poland, Portugal, Romania, Sweden, Slovakia, Slovenia, Spain.

2070 scenario start:

• European Union: European Union (leader), Nordic Federation, Slovakia.
• Palestinian Federation Palestine (leader), Jordan.
• Republic of the Southern Cross Australia (leader), New Zealand.

When a federation or unification is created, it will have the name and flag of its initial nation. However, certain nations will create federations or unifications with unique names and flags.

New Federation / Nation	Founding nation
African Union	Ethiopia
Central American Confederation	Guatemala
Central Asian Union	Kazakhstan
Czechoslovakia	Czechia
East African Federation	Tanzania
Eurasian Union	Russia
European Union	France
Germany	Germany
Gran Colombia	Colombia
Great Bantu Free State	Angola
Indonesia	Indonesia
Nigerian Confederation	Nigeria
Nordic Federation	Sweden
Pacific Defense League	Japan
Pan-Asian Combine	China

New Federation / Nation	Founding nation
People's Republic of Korea	North Korea
Peruvian Confederation	Peru
Republic of China	Taiwan
Republic of Korea	South Korea
Republic of the Southern Cross	Australia
Slavic Commonwealth	Poland
South American Union	Bolivia
Southeast Asian Alliance	Thailand
Tamazgha	Algeria
Turkestan	Turkey
United Arab League	Egypt
United Kingdom	England
United Malay Nation	Malaysia
United States of North America	United States of America
Yugoslavia	Southern Balkan States

(work in progress, contributions are welcome)

Wars

A nation is considered war-capable if it is not a Breakaway nation and it has an army or a nuke.

Effects

• Allows Terrestrial_Warfare.
• Increases Base Cohesion.
• Slowly decreases Government.

Declaring Wars

Any war-capable nation X can declare war on any other nation Y if all of the following conditions are true:

• X and Y are rivals.
• There is no war-capable nation that is allied to both X and Y.
• Y would be an accessible war enemy.

The faction that owns the executive control point of X must send a councilor to perform a Set National Policy mission in X to declare war on Y.

This declaration of war cannot be rejected by anyone.

When X declares war on Y, the following steps occur:

1. If it has been less than 90 days since X and Y became rivals, then the Cohesion of X decreases by 0.5 × (1 - days since X and Y became rivals / 90) × the Government of X.
2. X gains 1 Cohesion if all of the following conditions are true:
   • X did not lose any Cohesion in the previous step.
   • X was at peace.
   • The Unrest of X is less than 8.
   • The Cohesion of X is more than 2.
   • Either the Government of X is less than 7 or the Government of Y is less than 7.
3. Y gains 3 Cohesion if all of the following conditions are true:
   • The Unrest of Y is less than 8.
   • The Cohesion of Y is more than 2.
4. Each war-capable nation that is allied to Y is forced to join the war on the side of Y and gains 1 Cohesion if all of the following conditions are true:
   • The Unrest of the nation is less than 8.
   • The Cohesion of the nation is more than 2.
5. Each war-capable nation that is allied to X and not allied to anyone on the side of Y is asked if it wants to join the war on the side of X.
   • The faction that owns the executive control point of the nation gets to decide whether to join. Saying yes is equivalent to performing the Join War policy.
6. The faction that owns the executive control point of Y gains (3 × the number of control points Y has) hate for the faction that owns the executive control point of X.
7. Every nation that joined this war is put on a diplomatic cooldown of 90 days with all nations on the other side of the war.

SPOILERS INSIDE!
If either X or Y is the Alien Administration, then the first step is skipped.

Joining Wars

Any war-capable nation X can join any side S of any ongoing war W if all of the following conditions are true:

• X is allied to at least one member on side S of the war W.
• X is not allied to any member on the side of the war W that is not S.

The faction that owns the executive control point of X must send a councilor to perform a Set National Policy mission in X to join war W.

This joining of war cannot be rejected by anyone.

X is put on a diplomatic cooldown of 90 days with every nation on the other side of war W after X joins war W.

If X was not previously at war, and X joined the attacking side of the war, then X gains 0.5 Cohesion.

Seeking Peace

Any nation X can seek peace from any war W it is part of.

The faction that owns the executive control point of X must send a councilor to perform a Set National Policy mission in X to seek peace from war W.

The faction that controls the executive control point of the lead nation Y of the other side of the war gets to decide whether to accept or reject:

• If rejected, then X and Y are put on a diplomatic cooldown of 60 days.
• If accepted, then:
  • If X was the leader of its side of the war W, then the war W is ended:
    • Every nation involved in the war W is removed from the war.
    • Every nation involved in the war W returns to rival relations with every nation on the other side of the war W, and is put on a diplomatic cooldown of 90 days with them.
  • Otherwise, X is removed from the war W and returns to rival relations with every nation on the other side of the war W, and is put on a diplomatic cooldown of 90 days with them.

Note: Seeking Peace can result in Cohesion penalties for any nations that gained Cohesion from the war.

Other Sources

Wars can be started through various other means:

Declaring Independence

See Foreign_Relations#Declaring_Independence.

SPOILERS INSIDE!
Assaulting Alien Assets with Armies If the Alien Nation has at least one region, then using an army to begin an assault on an Alien Facility or Landed UFO will automatically force the Alien Nation to declare war on the army's home nation.