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Hello,
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Thanks for contacting World Warfare Support.
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The trade option can be unlocked at level 1. The total exchange amount is 6; population, steel, fortune and armaments are available at level 1. Rubber will be unlocked at level 2 and oil will be unlocked at level
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The transport option can be unlocked at level 3. You can transport resources, supplies and armaments to your monument, league city, league mates and to your personal city.