How does trading work between your own cities?

Question

I've played this game a few times with the tutorials helping me along the way. How do I get my cities to manage their resources properly? Some need a given resource and others are full with a given resource. I know there are import and export values I can set but beyond that it is not entirely clear to me what I should do.

In short, can someone elaborate how the trade system is meant to work amongst your own cities?

Answer 1

Are you talking about Goods and Materials?

As settlements produce goods, wagon trains can carry them to sea ports, where ships can transport them to Europe. ref

So you could also move them in wagon train in another city, to turn them into finished goods. The Guns and horses could also be moved using a standard unit.