Diplomacy: double attack on a region
Asuming the other fields are not relevant, we have the following setup:




The fleet in ion can not moves to adr because it is blocked.
Both the french fleet in tys as the ottoman fleet in aeg try to move to ion, both with support. Equal forces block. So both fail. Leaving the previously blocked fleet in ion unharmed.


So no unit moves. Leaving the setup unchanged.

Note: if the move to adr did not fail both supported moves still block eachother and the single fleet in ion stays unharmed.

In that case, the result will be: