Example: If the UK player wants to use Paris as an Air Base,
then a UK unit must be located in Paris. For a Minor Nation
ally, if Romania is active, and is used in ground combat, a
Romanian land unit must be involved in the combat but a city
occupied by a German land unit may provide the Air Base, as
long as it is also in-range- assuming Germany is the controlling
Major Power of Romania
Not sure if this has been rewritten or in a FAQ or somewhere else. And maybe it's difficult just for me, but I am having serious trouble parsing this piece of text.