I assume you mean Gas, as in Gascony. A unit can _not_ cut the support aimed at itself, _unless_ the unit giving the support is dislodged. If Par moves to Gas, Gas just shakes off the attack, laughs and helps Bre take Par. Par is forced to retreat. Same thing happens if Par attacks Bre. If there is an A Mar that attacks Gas instead, the support will be cut.

A move from Par to Gas would cut Gas support to anyplace *other than* Paris, but would not cut a support for Bre - Par. So, Gas S Bre - Par, Par - Gas results in Par being dislodged. Because it was dislodged from Bre, it will not be allowed to retreat to Bre.

If Par - Bre with power 1 and Bre - Par with power 2, Par gets into Bre, and Bre retreats, and again cannot retreat to Paris.

However, if there is a support for Par - Bre, it would bounce 2v2), and if some other unit (say, Mar) is ordered to Gas, that would cut the Gas support.

Also, there is no need for mid-atlantic to support Gas in your scenario. Even without any additional support, Gas can still support into Par even if Par attacks him. It's a 1 on 1 leaving Gas intact and still supporting.

I think you got those mixed up CS. "Par - Bre with power 1 and Bre - Par with power 2" would not let Par into Bre.

Indeed I did. That whole thing about 2 being bigger than 1. :) Sorry, it's a bit late here!

Where is that? It's sunshine and happy day time here in Sweden.

Oh, right, it's the time of the year where you get to see the sun. :) [Kidding, I love Stockholm!] Based in Japan at the moment, so I guess it's not all that late yet.

It sure is. Although Stockholm's not that bad. I grew up far further north, on the polar circle, where we got at best one hour of sunlight per day in December. I guess you can go up to Hokkaido if you're feeling sentimental for some northern Europe :)

ok, thank you very much. I thought the English would laugh at the French attempt but I wasnt clear. Now to add more of the story.
French armies in Paris and Marseilles. English Armies in Brest, Gascony and Spain and English fleet in MAO and the Gulf of Lyon.
Brest attacks Paris with support from Gas. Spain attacks Marseilles with support from Gulf. MAO supports Gas.
If Marseilles attacks Gas that will cut the support of Gas supporting Brest - Paris?

Yes, it will. Marseilles will be dislodged and have to flee, but before being dislodged, his attack cuts Gascony's support. Once again, the fleet in Mid-Atlantic is not needed in this scenario. The same exact result would happen without Mid-Atlantic supporting Gas.

I think what confuses GrandSlam (and confused me for quite a while) is that a supporting army, if attacked from elsewhere, will not support anything REGARDLESS of whether it is supported itself. That's why MAO is irrelevant, GrandSlam.