just some ideas about creating games.
1. Utilize a world map or some sort of map of the KNOWN world.
2. Use GDP (gross domestic product) of each country to rank economic wealth.
GO HERE for statics: https://en.wikipedia.org/wiki/List_of_countries_by_GDP_sector_composition
3. For military games, utilize country % of GDP expenditures used for Military growth to dictate power of military.
4. Lastly if your wanting to get into a lot of detail as to how many tanks, attack helicopters…ect a country has—-check out this AWESOME site that gathers these statics for you!
These are just some ideas on a WORLD game that can align with reality!-F4x4