As far as I'm aware the capabilities should all have positive values. The code may cope with negative values but it'd be accidental and probably not extensively tested... Things like growth and order bonusses are in terms of pips on the city details screen (ie 0.5% pop and 5% increments for order).Originally Posted by eadingas
Faction capabilities are granted faction-wide when the building is built - for example, once you build the building required for upgraded general's units, all new general's units created anywhere by your faction will be of the better, upgraded type.
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