Olympics

So I was thinking this morning of an Olympics maps with a bit of a game play twist (sure to have complaints if it ever happened).
I'm looking at a world map with each tert being a city that has hosted the olympics. So For instance there would be a tert called Bejing '08. Cities that have hosted twice would have two terts such as Los Angeles '84 and Los Angeles '32.
The twist on Gameplay then would be that you could only attack territories within 4 years of your tert. So for instance, The Bejing '08 Tert could attack Athens '04 tert but not the Seoul '88. Athens '04 Could attack Bejing '08, and Sydney '00 (as well as Turin '06 and Salt Lake City '02). We'd have to allow for the cancelled olympics so that London and St. Moritz in '48 would be able to attack Berlin and Garmisch-Partenkirchen in '36 as well as Antwerp in '20 being able to attack Stockholm in '12. The earlier olympics won't have as much to defend from so there might be an advantage to having them-not sure yet.
My thought is to have no continent bonuses at all although I'm open to suggestions on that.
Anyway, I thought I'd throw the rough ideas out there before trying to put together a map.
I'm looking at a world map with each tert being a city that has hosted the olympics. So For instance there would be a tert called Bejing '08. Cities that have hosted twice would have two terts such as Los Angeles '84 and Los Angeles '32.
The twist on Gameplay then would be that you could only attack territories within 4 years of your tert. So for instance, The Bejing '08 Tert could attack Athens '04 tert but not the Seoul '88. Athens '04 Could attack Bejing '08, and Sydney '00 (as well as Turin '06 and Salt Lake City '02). We'd have to allow for the cancelled olympics so that London and St. Moritz in '48 would be able to attack Berlin and Garmisch-Partenkirchen in '36 as well as Antwerp in '20 being able to attack Stockholm in '12. The earlier olympics won't have as much to defend from so there might be an advantage to having them-not sure yet.
My thought is to have no continent bonuses at all although I'm open to suggestions on that.
Anyway, I thought I'd throw the rough ideas out there before trying to put together a map.