What if Italy stayed allied with Germany and Austria-Hungary? I know Italy remained "neutral," but I was wondering if Italy did send troops to help the Central Powers, what would have changed?
1. Bulgaria and/or the Ottoman Empire wouldn't have entered.
2. France would be in a world of hurt.
3. Spain might have entered alongside Portugal, because they had possessions on the western Italian coast.
I also know Italy was "disunited." They weren't a united country until 1867/1871 onward. Also keep in mind that they had Austrian ancestry in the north, especially around Milan and Venice.