OTL, Italian nationalist poet Gabriele d'Annunzio and his followers seized and held Fiume thruout 1920 on the basis of wanting the Adriatic city to be incorporated into Italy instead of becoming part of Yugoslavia in the aftermath of WWI. Also OTL d'Annunzio surrendered the city to the Italian govt after Italian warships shelled his palace in Dec 1920, indicating Rome's impatience with his eccentric carrying-on. WI d'Annunzio hadn't given in so easily ? Would the Italian govt have risked complete political upheaval in launching a full-scale invasion of the city and wiping out his tiny army (only 200 strong IIRC) ? How would such an extended Fiume crisis have affected Italian and regional stability thruout the 1920s ? Possibly an earlier and more militant fascist regime established ?