My general practice is to treat an NRP as a normal single-character RP except people are permitted effectively infinite characters to use on their own without reapplication. As such, as I handle them they're more often than not narrative driven. I don't do dice-rolls. I don't do Excel spreadsheets. I don't do delivering orders to a GM who interprets them and their effect to whatever power fantasy he's running, statistical claims no withstanding.
This may seem like chaos. And it would be, if the people who participated lacked mutual respect and were not at ills at talking things out to devise a story that makes both parties happy, so even if someone "loses" they both win.
IMO, if you want to GM I would still advocate that you start with participating in a few yourself and not barging into the administrative function of running one totally blind. Because if you don't understand the House of Cards as well as you should, or have a terrible stat system then it will no doubt break down and you will be frustrated. So even if there's nothing in the Second World War time-frame that's new, you should at least check around some.
Speaking of myself and my own projects, I and the others would be more than willing to assist you in getting up to speed for something like Precipice of War, which actually sorta fits that bill; despite being set in the 1980's. Apart from helicopters much of the military functions - and likely even nationalist philosophies - are in a sort of quasi-40's attitude despite being 40 years late. We're actually just getting to our promised Second Great War, despite having ran for more than five years now across three forums. So stop in, we can fill you out, and maybe you can partake in some madness in Africa.
Otherwise for new, there's Do The Eagles Circle The Mountains which serves as a medieval-fantasy NRP. This comes without the stress of mangling a real nation's history so much to fit your own fetish you risk offending non-nationals for your ignorance. It also absconds away with the more complex ideologies of nationalism and post-19th century race/culture politics (well, sorta) and complex modern-economics, replacing them largely with a vague understanding on how feudalism works.