From Sorcerer King Wiki
Understanding and managing the economy of your kingdom is vital to your nation's growth. The main resource to keep track of is of is your Logistics.
- Training new units, claiming resources, and harvesting Elemental Shards all take Logistics.
- Cities can convert food into Logistics using special improvements. The speed at which you train units and build improvements is governed by the Production of a city. This is a resource that comes from the claimed tile yields of a city, with bonuses from built improvements.