3rd World Revolt

I'm trying to design a game but am having some difficulties. My basic idea is an unstable 3rd world country. There is two sides one side that is trying to join together all the cities and establish a government and the guerilla side thats goal is to destroy roads and cities and prevent the countries unity. I started out simple with hexes, three terrain types, as city, flat, and mountain. Mountain which you can't travel through. So far I'm only using one type of military unit like in Risk. And resource caravans to build roads and supply cities. Ideally I want to re-amp the game once it's finished to incorporate factories, research, and many different types of units with different speeds and abilities more like axis and allies. I just can't get the basics made up. After I have a core design to work with I'll be able to easily mold and shift the game. So if anyone has any ideas or tips for building this game up please let me know.