An excellent set for war and with very low infra cost and unkeep.
You must to have 2 of the following resources and a harbor. Also, only for red color, if you want to get in, switch your color to red.
[aluminium]
[Coal]
[Gems] Nasdap
[Gold]
[iron]
[Lead] BogdanSin
[Lumber]
[Marble]
[Oil] Nasdap
[Rubber]
[Silver] BogdanSin
[uranium]
Bouns resources: [steel] [Automobiles] [Jewelry] [scholars] [Construction] [Ration Cleanup] [Microchips] [Asphalt]
Set highlights:
Initial infrastructure cost: -41%
Infrastructure unkeep: -24.7%
Citizen income increase: $9.5
Happines: +15
Land area increase: 38%
Soldier increase: 42.6%
Tank unkeep: -17%
Aircraft unkeep: -25%
Aircraft limit : +10 units
Complete analisis: http://i43.nonpermited image host.com/30b0f1k.jpg
You may check this post for updates, or you can PM me via game or forum.
Once the ring is complete you can cancel your old trades and send the trade request to the members of the ring.
Good luck!