Produce 10,000 iron within a 100 year period.
Although a this is quite a lot of iron, this is relatively easy for the time period. Ensure that you're averaging above 100 iron a year.
- You can also send your workers to clear huge areas of land in order to boost your iron production.
- You can raise the number of maximum workers in your iron mines if you're short of space.
- You can use the town hall to keep track of your iron production.