(I'm presuming that you'd have all the original factions from E:TW as well, sans the Americans)

China
Japan
Iran
Afghans (Not sure what they were called at this point)
Kazakhs/Uzbeks
Various Indian states
Burma?
Korea?
Georgia?

I also recommend that it start slightly earlier, as it would be a bit boring IMHO if you had an all-powerful Russia and Britain, with no room for the other factions.