So, returning to the topic of the role-playing game:

Resources like iron, oil, aluminum, uranium, and so on will be scattered across the map. Since we’re starting at the beginning of the Cold War (around 1950), some resources will already be available. By building a mine on a deposit, you will receive a certain amount of resource points.

For example: if you have iron deposits on your map, and you build a mine on them, you will get, say, 5 iron points. By constructing a steel mill in any city, you can convert those 5 iron points into 5 steel points. Each resource will add a certain amount of production points. Besides resources, cities and factories will also generate these points. The more points you have, the more units of vehicle you can produce per turn.

What do you think about this?