You could start with Babar or Timur, but maybe best to start with the British invasions in the 19th century. Or even the beginning of the civil war in 1978. Playable factions would include the Communists (Russian and domestic), Islamists, and Westerners (and their internal allies). Regional "Green" forces (a very popular color

Topic very much in the news these days, possible sales outside the gaming community if the game is well-done. Maybe you could even get a grant to do it, from NATO or the U.S. government?