RoaE: Resources, what are they good for?

Here is a quick summary of what resources can be used for.

General (costs that don't use specific resources.)
*increasing Development of a region.
*certain buildings and upkeeps use varying resources.

Food
*creating an army unit.
*holding festivals to improve moral.
*personal training for tactics.

Gold
*Hiring Mercenaries.
*Training for tactics.

Lumber
*Increasing rank of Keep.
*Training for Architecture.
*Used for constructing buildings.

Mana
*Casting spells.
*Training for Spells.

Ore
*Training for Architecture.
*Used in constructing buildings.