Strategic Industry - Rise and Fall

Strategic resources are now more important than ever. The role of strategic resources has been expanded by giving them the ability to boost production for most military units. Production for most military units is now boosted by 100% when a civilization possesses the required resources. Unit costs have been doubled. So the boost gets them back to their normal costs. This also affects purchasing and upgrading. The boosts will not stack if multiple resources are owned. Unique unit costs have been untouched. Example: The Knight requires Horses to be constructed. If your civ possesses Iron then the production cost is cut in half. The Knight can also be constructed without Iron, it just takes much longer. ------- Early strategic resources now have importance through the entirety of the game. For this reason you might think twice before trading them away: Iron when combined with Coal will trigger the Factory to produce Industrial Steel. Industrial Steel boosts production for virtually all late game units beginning in the Modern Era. Horses now have +2 Amenities Niter adds +1 Food to all farmed resources when the Research Lab is built. Coal or Oil or Uranium trigger the Shipyard to produce Marine Fuel. Marine Fuel is required by all naval units (except submarines) starting in the Modern Era. ------- More examples: In some cases combined resources are required to boost production. Example: Industrial Steel and Uranium combined will boost production of the Modern Armor. Owning one of