Not to mention, I've read from the Vanilla Sleeper Ship Nations, Hispania has only (Spain) in it, but Disco added "Mediterranean" wouldn't that mean that there was a purpose of adding all those remaining Countries that weren't present in this game? The Countries that Coast the Mediterranean Sea such as Albania, Algeria, Bosnia-Herzegovina, Croatia, Cyprus, Lebanon, Libya, Morocco, Montenegro, Slovenia, Syria, Tunisia and Turkey (btw these are countries that did not join the Coalition, not to mention that Croatia, Albania and Turkey are all part of the NATO Military, so it's safe to assume they were part of the Alliance).
I suppose, nations such as Serbia would've joined the Coalition, because they're carrying the old spirit of Yugoslavia.