What are the requirements for upgrading units?
Here is my prob:
I'm in the Middle Ages and have a bunch of spearmen in cities which I want to upgrade to pikemen. They all have iron in their strategic resources box's but only some cities can upgrade. They are also all joined by road.
I have 2 iron sources.
What else do I need to do?
Here is my prob:
I'm in the Middle Ages and have a bunch of spearmen in cities which I want to upgrade to pikemen. They all have iron in their strategic resources box's but only some cities can upgrade. They are also all joined by road.
I have 2 iron sources.
What else do I need to do?
Comment