The Civilinic Books

Diplomacy And Tributes
by zenon

Demanding Tribute

One of the important aspects of diplomacy is getting tribute from the AI. Over the time I have done some research on this topic and I think there is enough interesting information to share.

1. Prerequisites for demanding Tribute

A. Relative Military Strength

The decisive factor for tributes is what I call Relative Military Strength (RMS). It is the result of 2 factors:

in relation to

RMS

Military strength of human player /Military strength of AI
The AI will give in to your demand, if your military strength is higher than the AIs (RMS > 1 or 100%). If the military strength of the human player is equal or lower than the AIs, the AI will demand tribute first and reject the human players demands.
The AI offers tribute for peace, if the military strength of the human player is 2 (200%) or higher (for modifications see the table under determinig tributes).

Sea units are counted if they are in a harbour on the same continent. Air units dont have to be in a city but on the same continent. RMS is calculated at the beginning of the turn. Events during the tum (e.g. units land on AI continent, units lost) will will be taken into account next turn.

B. Government

There is no tribute option under Republic and Democracy for the human player. Tribute can be demanded under all other forms of government (including anarchy). The AI demands tribute under all forms of government

C. Treasury/Techs

Gold as a tribute is given only when the AI treasury has a minimum of 50g, otherwise you will always receive a tech (if available). The AI demands tribute only if the human players treasury has a minimum of 50g.

D. 8 Turn Cycle

The AI will pay tribute only if a minimum of 8 turns passed since peace was concluded.

D. War and Alliances

Obviously no tribute is given in a state of war. It may be offered for truce, though. In an alliance no tribute can be demanded. Instead gifts can be asked for.

2. Determining Tributes

Tributes are calculated. There is no random factor.
Multiplier: the multiplier for demanded tributes is 50g, for tributes offered for peace 100g.
Maximum tribute: of the AI treasury only full multipliers are considered, example: AI treasury 230g, multiplier 50g = max. tribute 200g
For practical purposes the following table might be helpful. It also shows the pattern.
Values are: Human players military strength/ AI military strength.
REMS in %valuesoffered for peacepaid when demanded
1001:1nonenone
1002:2nonenone
1003:3nonenone
1006:6nonenone
1206:5none100
1334:3none100
1407:5none100
14014:10none100
14042:30none100
1503:2none100
1509:6none100
15015:10none100
15030:15none100
1608:5none100
16016:10none100
16024:15100150
1665:3none100
1757:4none100
17514:8100150
1809:5100150
19019:10100150
2002:1none100
2004:2none100
2006:3100150
2008:4100150
20010:5100150
20014:7100150
20016:8100150
20018:9100150
20020:10100150
20022:11100150
20026:13100150
20030:15100150
20040:20100150
22011:5100150
22022:10200200
2337:3100150
23314:6200200
24012:5200200
2505:2100150
25010:4200200
25015:6200200
25020:8200200
27511:4200200
3003:1100150
3006:2200200
3009:3200200
30012:4200200
30015:5300250
30021:7300250
32016:5300250
33310:3300250
33320:6300250
36611:3300250
36622:6400300
4004:1200200
4008:2300250
40012:3400300
40016:4400300
40020:5400300
42021:5500350
46023:5500350
48024:5600400
5005:1300250
50010:2400300
50015:3500350
50020:4600400
50025:5600400
50030:6600400
53316:3600400
6006:1400300
60012:2600400
60018:3700450
60024:4700450
7007:1500350
70014:2700450
70021:3800500
70028:4900550
all values tested in 2.42 in BC years with a sufficient AI treasury.

Modifiers:

3. Factors without Influence

4. Practical Use

A few examples:
It is relatively easy for the human player to get a higher RMS as the AI units are just counted by numbers. An extreme example: 2 warriors and one horse (sum of attack values = 4) are rated higher than 3 AI musketeers (number of units = 3) and tribute will be paid. If the AI is not willing to pay, you simply have to build a few more units and try again.
To get tributes from an AI on a different continent you can ship some units with a good attack factor there.
If your sea units (with an attack factor i.e. a trireme) are idle, they should wait in a harbour to improve your RMS.
It is also possible to get information about the approximate number of units the AI has from the tribute that has been received (or rejected). Example: tribute given is 200g, human military strenght is 15: the AI wont have more than 6 military units on this continent.
If the AI offers peace it is safe to assume that the human player is stronger. If you expect to be at least 2 times stronger it is best to reject peace and then take the tribute offered for peace. You can demand tribute again the same turn you conclude peace (while the diplomatic screen is still open) and the AI will pay a full tribute again (assuming the treasury is not empty, yet). The 8 turn cycle (where no tributes are paid) begins in the next turn.