I'm thinking Syria. Maybe even Kurdistan.
Discussion
Syria? I don't think so. Kurdistan no, i don't see how this could happen.
Why not? Full of oil fields. Americans are over there, too, after all.
USA troops will not stay there forever and for the Rusdians it was better with the Assad regime. Right now at the north of Syria, what will happen depends mostly to what the Turks will do. The interesting topic is southern Syria...