1) Can generals or units be upgraded? I have some good generals who are commanding peasants. I would like to keep him but with a better unit of course.

2) How does trade work? Will the income increase if there is a port? Do I need to have boats in the water to get overseas income???

3) Is it worth it to have a trade house in a territory w/o tradeable goods??

4) Should I bother having a trade house and/or port in a city w/o tradeable goods?

Thanks.

Marauder