Iron

Iron is one of three main resources in the game alongside Grain and Wood. These are special resources that are required for more advanced kingdoms. Each resource is produced by allocating your villagers to the corresponding production building. Without these resources, a bigger kingdom will stagnate and stop producing units. If you produce too much or too little of any resource, you can always trade with others for other resources, gold or units, you can earn money if you produce a lot of resources, on the other hand if you don't want to focus on making resources, you can always buy enough for yourself from other players or the shop.