Isaf
Yeah I think ISAF was a group of collected Nations, however, to represent in Hearts of Iron Ace Combat, should probably have it start out as seperate nations but through events should gradually change over to Annex the member countries of ISAF to make it all one nation to represent the fact that they all tied in logistics, armies etc, becoming one military. Then post War ISAF did disband after a year or so, gotta remember to make them all revert back.
But yeah once again the map will be the most difficult to do, so keep shooting for that.
If you need help with clarification or anything in the Ace Combat series please do ask I write fan fiction for it so mostly know my stuff.
In the mean time I'll be looking up those other member nations to see if that helps, also make sure to put in a decent amount of provinces on the continents so that the wars don't litterally end within like a month cause there isn't much to take.