联邦

This article is about the "Federations" mechanics. For the DLC, see Federations (DLC).

A Federation fleet from every species class.

Federations are groups of empires that band together for mutual benefit. A federation is a more in-depth version of a Defense Pact with its own set of laws, rules and perks. Diplomatic relations inside of a federation become more favorable: members do not generate border friction amongst themselves, build trust with each other to a cap of +100 and share 10% of their victory score with each other. Players can set a name for their federation at creation or leave it random; the name can be changed at any time. In the default map view, all federation members share the same color.

A federation can only be created by one of three ways. An empire that adopts the Federation tradition from the Diplomacy tree may create a Federation with another empire, an empire that has an origin that gives them a federation, or during the late game "War in Heaven," the strongest empire in the galaxy will get an event to create a League of Non Aligned powers, even if that strongest empire doesn't have the Federation tradition. Empires with the  野蛮掠夺者（Barbaric Despoilers） civic can create only a Martial Alliance or Hegemony federation. An invited empire must have a positive acceptance score with an existing federation member for said member to vote for their addition. Hovering over the diplomatic choice will show which empires agree and disagree.

Members of a federation have their  能量币（Energy Credits） Output reduced by -15%. This tax doesn't apply to  能量币（Energy Credits） generated from trade.

When a member leaves or is kicked from a federation it gains a Truce with the federation.

Leaving a federation will grant a temporary -200  评价（Opinion） with all federation members.

Federation types

The federation type determines what perks the federation will provide at each level. The federation type can be changed as the game progresses by clicking on the federation type icon. Changing the federation type, however, will reset the federation level to 1.

The Galactic Union federation type is available by default but all other federation types require the  纵横捭阖（Federations） DLC. The Trade League federation type additionally requires the  寰宇企业（Megacorp） DLC in order to meet the requirements.

Federation type	Level 1 perks	Level 2 perks	Level 3 perks	Level 4 perks	Level 5 perks	Requirements
Galactic Union	−50% Cohesion loss from ethics +60 Intel cap between members	President modifiers: +1 Available envoys Member modifiers: +25% Naval Contribution effect −50% Cohesion loss from new members	President modifiers: +1 Federation influence gain Member modifiers: +2 Unity per federation envoy +5% Trust growth per federation envoy +10% Ship speed in federation space	President modifiers: +10% Diplomatic weight Member modifiers: −50% Cohesion loss from failed votes +25% Damage to crisis ships	President modifiers: +10% Monthly unity Member modifiers: +2 Unity per federation envoy +5 Trust cap per federation envoy +25% Damage to crisis ships
Trade League	Trade League trade policy +50 Intel cap between members	President modifiers: +1 Available envoys Member modifiers: +5% Trade value +10% Ship speed in federation space	President modifiers: +1 Federation influence gain Member modifiers: +5% Trade value +5 Trade protection	President modifiers: +10% Diplomatic weight Member modifiers: +5% Trade value +25% Naval contribution effect	President modifiers: +10% Trade value Member modifiers: +5% Trade value +25% Damage to crisis ships
Martial Alliance	+100 Ship starting experience +100 Army starting experience +25% Ship build speed +50 Intel cap between members	President modifiers: −10% Claim influence cost Member modifiers: +25% Naval contribution effect +10% Ship speed in federation space	President modifiers: +1 Available envoys Member modifiers: +1 Admiral level cap +10% Ship fire rate	President modifiers: 10% Federation fleet unity Member modifiers: +25% Naval contribution effect +25% Damage to crisis ships	President modifiers: +10% Diplomatic weight Member modifiers: +25% Naval contribution effect +25% Damage to crisis ships
Research Cooperative	Free Research Agreement with all members +50 Intel cap between members	President modifiers: +1 Research alternatives Member modifiers: +5% Research speed from agreements +5% Research speed	President modifiers: +20% Diplomatic weight from technologies Member modifiers: +5% Research speed from agreements x2 Rare tech discovery chance if other members have it	President modifiers: +1 Available envoys Member modifiers: +5% Research speed from agreements +20% Research speed during a crisis	President modifiers: +1 Megastructure build capacity Member modifiers: +5% Research speed from agreements +20% Research speed during a crisis
Hegemony	Members cannot leave the federation Members can gain the Secede casus belli Reduced Centralization requirements +40 Intel cap between members	President modifiers: −100% Naval contribution cost +1 Available envoys Other members modifiers: +5% Resources from jobs	President modifiers: Gain the Establish Hegemony wargoal Other members modifiers: +5% Resources from jobs −50% Cohesion loss from new members	President modifiers: +1 Federation influence gain Other members modifiers: +5% Resources from jobs −100% Migration Pact upkeep −100% Research Agreement upkeep	President modifiers: 10% of every member's diplomatic weight Other members modifiers: +25% Damage to crisis ships 10% Federation fleet unity

Federation projects

Once 60 years pass, if a federation reached at least level 2 and is at peace its president may be offered the choice to start a joint project with the other federation members. The joint project lasts 10 years and requires each member to individually complete a special project. If not even a single member completes it the joint project will fail and the federation will gain −50  团结度（Cohesion）.

•  星系联盟（Galactic Union） and  研究合作组织（Research Cooperative） federations have the objective of studying a space aurora. Each member will be given a special project above its capital starbase that requires a science ship with a level 2 or higher scientist and requires 200  物理学研究（Physics Research） Research. Completing the special projects brings a choice but its effects are purely visual. The project is complete after 3 years or when every member finishes the special project.
  • If all members participated the federation will gain +30  团结度（Cohesion） and each member will gain +10%  物理学研究（Physics Research） and +5%  社会学研究（Society Research） Research Research for 10 years
  • If not all members participated each member that participated will gain +10%  物理学研究（Physics Research） Research for 6 years
•  霸权（Hegemony） federations have the objective of building a monument. Members that agree gain a temporary +30  评价（Opinion） with the president while those that refuse gain −50  评价（Opinion） with the president. If more than half of the members disagree the federation will lose 100  团结度（Cohesion） and the president will lose 50  影响力（Influence）. If at least half of the members agree all members that agreed will be issued a special project above the president's capital which requires a construction ship and takes a year to complete, while the president will be issued a special project to give members +35% attraction towards the president's ethics which requires a science ship and takes 6 months to complete. Any member that finishes the special project will gain a temporary +50  评价（Opinion） with the president. Once all member special projects are completed the project is completed.
  • If all members participated the federation will gain +100  团结度（Cohesion） and the president will gain the Federation Monument planetary feature on the capital
  • If not all members participated the federation will gain +25  团结度（Cohesion）
•  军事同盟（Miltiary Alliance） federations have as their objective a federation-wide fleet exercise. Members that agree gain a temporary +50  评价（Opinion） with the president while those that refuse gain −50  评价（Opinion） with the president. If more than half of the members disagree the federation will lose 100  团结度（Cohesion） and the president will lose 50  影响力（Influence）. If at least half of the members agree the president and all members that agreed will be given a location in the Situation Log which they must reach with a fleet of at least 15 ships. Once each member reaches the location a hostile fleet of 5-9 ships will appear and must be defeated in 30 days. Once each fleet is defeated the project is completed.
  • If all members participated the federation will gain +100  团结度（Cohesion） and each member will gain +15%  舰船武器射速（Ship Fire Rate） for 25 years
  • If not all members participated the federation will gain +50  团结度（Cohesion） and each member that participated will gain +15%  舰船武器射速（Ship Fire Rate） for 25 years
•  贸易联盟（Trade League） federations have the objective of creating a shipping standard. Within two years each member must generate in a star system at least 50  Trade Value. Members that fail will gain −10%  Trade Value until the project is complete. Members that succeed will gain +5%  消费品（Consumer Goods） and −10%  Trade Value, or only −5% if the system's Starbase has an Offworld Trading Company building, and will be issued a special project on the system's Starbase that requires a construction ship. Once each member completes its special project all modifiers are removed and the project is completed.
  • If all members participated each member will gain +5%  消费品（Consumer Goods） and +12%  Trade Value
  • If not all members participated each member that participated will gain +2.5%  消费品（Consumer Goods） and +10%  Trade Value

Federation Cohesion

Cohesion is a measure of how unified a federation is and ranges from +100 to -100. It has the following effects:

• Each 10 points of Cohesion above 0 adds +1 XP per month to a federation, up to +10 at +100 Cohesion .
• Each 10 points of Cohesion below 0 adds -1 XP per month to a federation, up to -10 at -100 Cohesion .
• Each 4 points of Cohesion above 0 adds +1 Acceptance for changing federation laws.
• Each 4 points of Cohesion below 0 adds -1 Acceptance for changing federation laws.
• Cohesion below 90 reduces the Acceptance for increasing the Centralization Law by -50.

The following incur immediate Cohesion changes:

• -100 whenever a member joins or leaves the federation.
• -50 whenever federation Type changes
• -10 whenever federation Centralization Law changes
• -5 whenever any other federation law changes
• -10 whenever a failed vote occurs

The following incur monthly Cohesion changes:

• +1 for each envoy assigned to the federation
• -0.25 for each member of the federation
• -0.15 multiplied by the number of different ethics, minus 3 (moderate and fanatic ethics of the same type will count as different ethics)
• -0.5 for each opposed ethics (Two opposing fanatics, or any combination with only a single fanatic will only count for one set of opposed ethics. Normal and fanatic on one side, and fanatic or normal and fanatic on the other will count for two.)

If a federation loses the experience required for a level and fails to raise it above the required limit within 90 days, the federation level will downgrade and remove all perks from the previously held level. Each level requires the following amount of experience:

Level	2	3	4	5
XP	1200	3600	8400	18000
XP from previous level	1200	2400	4800	9600

A federation's experience is capped at 18000, meaning that at level 5 any negative Cohesion will downgrade the federation level.

Federation Fleet

Federations that have their Fleet Contribution law set to anything other than None feature a joint fleet in addition to the forces of the separate member empires, controlled by the current federation president. Federation fleets cost no maintenance and use the federation fleet capacity, to which every member contributes based on the Fleet Contribution law, up to 600. The fleets cannot exceed this cap. The Entente Coordination tradition doubles the naval capacity contribution of the members that adopt it while not reducing their own further. Federation fleets do not have a command limit.

The president designs the federation fleet ships via a special ship designer available in the federation menu and may use any technology available to any member empire. Regular ship designs cannot be used to build federation ships. The president's empire is responsible for commanding the federation fleets. Federation law determines whether any member of the federation or the president's empire alone can build ships for the federation fleet. Any AI federation member's research of a component-unlocking technology will auto-update the default federation designs, but not any player-created ones, adding theirs to the list instead. Since their designs are considered newer if you update your federation fleets at this time your fleet will become their design, which can be undesirable.

If a federation is disbanded, so is the federation fleet.

The federation fleet has its own Titan limit, which does not affect the number of Titans its members can construct individually.

The federation can include one Juggernaut regardless of whether any member empire has one of their own.

Federation laws

Federation laws dictate how the federation operates and customize certain aspects of a federation. Any federation member can propose a law change. Hovering over any law will list the federation members that will oppose it. A failed vote will add −10  团结度（Cohesion）.

Federation Centralization

Federation Centralization determines what Federation laws are available and is limited by the current federation level. Raising centralization will incur increasingly higher cost to cohesion.

Type	Monthly cohesion	Member intel cap	Required level	Description
Minimal	0	+10	1	The Federation's influence over its members is kept at a minimum.
Low	−1	+20	2	The level of Federation influence over member states are kept very low.
Medium	−2	+30	3	The Federation has a good deal of influence over its members, while still allowing some independent governing.
High	−3	+40	4	The Federation's influence over its member states is almost absolute.
Very High	−4	+50	5	The Federation has sovereign control over how member states are being governed.

Fleet Contribution

The Fleet Contribution law determines how much  海军容量（Naval Capacity） is transferred from federation members to the federation fleet. The availability of laws is heavily affected by the federation type.

Type	Monthly cohesion	Transferred naval capacity	Max Fleet Size	Required centralization					Description
				星系联盟（Galactic Union）	霸权（Hegemony）	军事同盟（Miltiary Alliance）	研究合作组织（Research Cooperative）	贸易联盟（Trade League）
None	0	0	0	Minimal	Minimal	Minimal	Minimal	Minimal	This federation has no collaborative military effort.
Low	−0.25	10%	200	Low	Minimal	Minimal	Medium	Low	This federation has a minor collaborative military effort.
Medium	−0.5	20%	400	Medium	Low	Low	Very High	Medium	This federation has a moderate collaborative military effort.
High	−0.75	30%	600	High	High	Medium		Very High	This federation has a extensive collaborative military effort.

Federation Fleet Construction

The Federation Fleet Construction law determines who can build ships for the federation fleet.

Type	Effects	Required Centralization
Everyone	All members can build ships for the federation fleet	Minimal
Only Leader	Only the federation president can build ships for the federation fleet	Low

Succession Type

The Succession Type law determines how the next federation president is chosen once their term is up.

Type	Monthly cohesion	Effects	Required centralization	DLC
Rotation	-0.5	Leadership is rotated among each Federation member	Minimal
Strongest	−1	The empire with the highest succession power becomes the next president	Minimal if Hegemony High if Other
Random		The next president is chosen randomly	Minimal
Challenge		The empire that wins the challenge becomes the next president	Low

Succession Power

If the Succession Type law is set to Strongest then this law will define what criteria is used to determine which empire is "the strongest".

• Economy chooses the president based on economic power
• Diplomatic Weight chooses the president based on diplomatic weight
• Technology chooses the president based on technology level
• Fleets chooses the president based on fleet power

Challenges

If the Succession Type law is set to Challenge then this law will define what the challenge for the choosing the next president will be. Empires that do not meet the challenge requirements will be forced to drop out from the competition.

Challenge	Description	Empire drops out if
Arena Combat	The rulers of all federation members fight in an arena battle and the winner becomes president while all losers are killed. Each ruler has a chance to win based on a variety of factors. Winning Odds above 60 and below 500 is counted as 60, namely  天选之人（Chosen One） plus an Odds reducing factor. Condition 展开Odds Empire ethics  极端和平主义（Fanatic Pacifist）: -10  和平主义（Pacifist）: -5  军国主义（Militarist）: +5  极端军国主义（Fanatic Militarist）: +10 Empire civics  公民兵役（Citizen Service）: +6  尚武文化（Warrior Culture）: +20 Ruler traits  药物依赖（Substance Abuser）: -5  活力四射（Eager）: +1  顽固（Stubborn）: +1  善于适应（Adaptive）: +3 Resilient: +5 Cyborg: +15  合成人（Synthetic）: +20  灵媒（Psychic）: +25  天选之人（Chosen One）: +500 General traits (if the ruler was a General)  纸上谈兵（Armchair Commander）: +3  陆战队后勤专家（Army Logistician）: +3 Charismatic: +3  克制（Restrained）: +3  身先士卒（Glory Seeker）: +8  屠夫（Butcher）: +10 Mercenary Warrior: +15 Admiral traits (if the ruler was an Admiral)  懒散（Lethargic）: -3  火力全开（Aggressive）: +2  战略家（Trickster）: +3  Mercenary Warrior: +10 Governor traits (if the ruler was a Governor) Bureaucrat: -10  知识分子（Intellectual）: -10  退伍海军军官（Retired Fleet Officer）: +2  退伍老兵（Army Veteran）: +3 Ruler species traits  纤弱（Weak）: -10  愚笨（Slow Learners）: -2  天赋异禀（Talented）: +2  聪颖（Quick Learners）: +2  快速复原（Resilient）: +6  强健（Robust）: +6  强壮（Strong）: +10  非常强壮（Very Strong）: +15  幸存者（Survivor）: +3  石质（Lithoid）: +5	Empire is a  格式塔意识（Gestalt Consciousness）
Psionic Battle	The psionic Pops of all federation members fight in an arena. Before the fight each empire will be offered to pay  泽珞（Zro） to increase its odds of winning. Each empire's odds to win, capped at 400, are calculated by the following: +1 per Pop with the Latent Psionic trait +3 per Pop with the  灵能（Psionic） trait +10 per  灵能使（Telepath） job +40 if the empire paid 100  泽珞（Zro） +60 if the empire paid 500  泽珞（Zro） +80 if the empire paid 1000  泽珞（Zro）	Empires without Pops with the  灵能（Psionic） or Latent Psionic trait automatically drop out from the competition
Golden Rule	A bid value is determined based on the federation president's stored  能量币（Energy Credits）. President's Energy Credits Bid 0-10000 2500 10000-100000 5000 100000+ 10000 Each member is offered the chance to pay and place a bid or drop out. If multiple members placed a bid, then the offer is given again to those members. Bidding continues until all but one empire have dropped out. This remaining empire then becomes the new president and will also gain the option to invest the bids placed by all members, distribute them or appropriate them. Investing will give all federation members +10%  Trade Value and +5%  能量币（Energy Credits） for a year Distributing will refund each member  能量币（Energy Credits） based on the sum made by all members Appropriating will grant the president  能量币（Energy Credits） based on the sum made by all members and give +5%  能量币（Energy Credits） and -100  评价（Opinion） with all federation members for 50 years Base sum Redistribution value Appropriation value 0-10000 1000 7000 10000-100000 2500 15000 100000+ 5000 75000	Empire refuses to pay or can't afford to place a bid
Thesis Defense	Each member empires assembles a team made up of up to five recruited scientists. Each scientist leading a research area will always join if present. Each team has a chance to win based on the traits of each team member. Each odds adjustment is applied or not based on the number of team members that meet its condition. Condition 展开Odds Base weight 20 1+  善于适应（Adaptive） +10 1+  活力四射（Eager） +5 1+  狂热（Maniacal） +10 1+  细致（Meticulous） +10 1+  灵光一闪（Spark of Genius） +20 1+  药物依赖（Substance Abuser） +10 1+ Expertise: Statecraft +10 1 Any Expertise trait +5 2+ Any Expertise trait -10 1+  定制AI助理（Custom AI Assistant） +10 1+  智能AI副官（Sapient AI Assistant） +20 1+ Towel-bearer +9 1+  策展人（Curator） +10 1+  灵媒（Psychic） +10 1+  天选之人（Chosen One） +30 1+  义体人（Cyborg） +10 1+  合成人（Synthetic） +5 1+  博学多识（Erudite） +15 1+  偏执（Paranoid） -5 1+  顽固（Stubborn） -5 2+  无忧无虑（Carefree） -10 2+  狂热（Maniacal） -20 2+  药物依赖（Substance Abuser） -20 No empire in the federation has Technology Level Superior or Overwhelming +40 No empire in the federation has Technology Level Equivalent +30	Empire does not have at least three scientists

Succession Term

The Succession Term law determines the length of the federation president's term and thus how often the president changes.

Type	Effects
10 Years	Succession happens every 10 years
20 Years	Succession happens every 20 years
30 Years	Succession happens every 30 years
40 Years	Succession happens every 40 years
Status Change	Succession happens when a member surpasses the president by 25%

Federations DLC

The federation can be customized further with the following laws if the  纵横捭阖（Federations） DLC is installed.

Can Subjects Join
Type	Monthly cohesion	Effects	Required centralization	DLC
No	0	Subject empires will not join the federation Existing subjects of a federation member are kicked from the federation Unavailable for Hegemony federations	Minimal
Yes	0	Subject empires will join or leave the federation if the overlord does Existing subjects of a federation member join the federation Shortly after creation, a new federation will have this law set automatically unless the members propose and affirm the "No" law	Minimal
Vote Weight
Type	Monthly cohesion	Effects	Required centralization	DLC
Equal	0	Each member has equal voting power	Minimal
Diplomatic	0	The voting power of each member is determined by their  外交权重（Diplomatic Weight）	Medium
War Declaration
Type	Monthly cohesion	Effects	Required centralization	DLC
Unanimous Vote	0	Each member must agree	Minimal
Majority Vote	0	The majority of the members must agree	Minimal if Hegemony Low if not Hegemony
President Decides	−0.5	Only the federation president must agree	High
Invite Members
Type	Monthly cohesion	Effects	Required centralization	DLC
Unanimous Vote	0	Each member must agree	Minimal
Majority Vote	0	The majority of the members must agree	Low
President Decides	−0.25	Only the federation president must agree	Minimal if Hegemony High if not Hegemony
Kick Members
Type	Monthly cohesion	Effects	Required centralization	DLC
Majority Vote	0	The majority of the members must agree	Minimal
President Decides	−0.5	Only the federation president must agree	Minimal if Hegemony Very High if not Hegemony
Free Migration
Type	Monthly cohesion	Effects	Required centralization	DLC
Disabled	0	Pops cannot migrate to other federation members without a  移民协议（Migration Treaty）	Minimal
Enabled	0	Pops can migrate to other federation members without the need for a  移民协议（Migration Treaty）	Medium
Separate Treaties
Type	Monthly cohesion	Effects	Required centralization	DLC
Allowed	0	Members can sign  商业协议（Commercial Pact）s, Migration Treaties or  科研协议（Research Agreement）s with empires outside the federation	Minimal
Prohibited	−0.1	Members cannot sign  商业协议（Commercial Pact）s, Migration Treaties or  科研协议（Research Agreement）s with empires outside the federation	Low

References

游戏概念