According to the manual "For other Rumanian ground units, if Rumanian and non-Rumanian units are stacked in a hex, then the side whose units have a smaller combat value will have its units automatically disbanded" but I had stacks of 2 german infantry division with rumanian fortified region and they all got disbanded. I can't believe 2 infantry divisions with CV 3-5 was of less combat value than a fortified region.
By the way, on the same turn as Rumania surrendered, some tanks were exported there from Germany...
