The Persian Wars
Each territory is marked with a terrain type, P,H, and M indicating Plains, Hills, and Marshes respectively. Following this indicator are often, but not always, one or more resource indicators. These are P,L,O, and F for Populace, Lumber, Ore, and Fertility respectively. Keep in mind that this is a simplified abstraction of resources. For instance, a region known for the production of valuable crafts might be marked with an O for Ore, in order to represent that wealth indirectly. Similarly, a region known to produce tar (a rare and valuable commodity used by shipwrights), might be represented by two or more Ls for Lumber.
Each region produces 10 resource units for each indicated letter. For example, a territory with an L and an O on it, will produce 10 Lumber and 10 Ore every turn. These resource units may be traded via ship, or they may be spent on units, as per the costs indicated in the Units section.
All Polis (cities) are understood to produce 10 populace units each turn. A region with a city, and a P would produce 20 populace per turn.
Finally, all resources produced automatically converge towards the nearest port or Polis from surrounding territories. The move over land by cart at a speed of 2. When specified, they can be moved from port to port via transport. An unbroken line of transports form one port to another can form a “bridge”, which results in an uninterrupted flow of goods between the ports.