Water mills

[Crecer13]

River cities should be able to build watermills. Including upgrades: Mill pool - which pools were used to breed fish near the water mill. The water wheel press, used by the ancient Romans to produce the famous Lorica segmentata, in the Middle Ages this technology returned to produce sheet steel for lamellar armor and knightly armor that had a thickness of 0.5 mm to 1.5 mm and cost crazy money if forged them manually. Reduces the cost of heavy units.