Iron mine

There can be no successful civilizations without this precious metal. Sometimes you can't prove your points over diplomatic ways, but maybe your army can. In order to train troops, upgrade their attack and armor and research new technologies, you will need plenty of iron, so get back to work!

Requirements

Is required for
 * In order to construct this building, you have to research the 3rd level of Masonry technology.
 * Not defined

Main statistics
Iron is defined as an advanced resource, mostly used for training your troops. Every soldier needs weapons and every civilization needs iron, so make sure to improve your Iron mines as much as possible or you won't last long!

Tips & tricks
 * Iron mine needs slightly more stone than wood for its construction. It also needs a lot of food. Cost for upgrading this building rises more quickly than Coal mine upgrades, so spend your resources wisely! All we can say is - you need a lot of that particular metal!

Upgrades and resource gain
Bravery can be bought, by having some fine iron weapons!

Cost per level upgrade
Cost = Base cost x 1.3 (Iron mine level - 1)

(Base cost is 65 lumber, 80 stone and 35 food)

Resource production
Production = Acceleration x 42 x Iron mine level x 1.1 Iron mine level
 * PPH - Production Per Hour
 * PPD - Production Per Day