Wow, a lot to think about here!
I was thinking more on the lines of US/Liberia than US/Britain, but anyway.
Piratini wouldn't be in nearly as weak a position as OTL Liberia - it would be richer, more populous and militarily stronger - and Italy wouldn't be as powerful as the United States. So I'd anticipate that the relationship would be more nearly equal than USA/Liberia, although Italy would certainly be the senior partner.
Here, while the overall picture would be similar, the relationship would be perceived as special. Sharing a national hero of high symbolic value like Garibaldi, not to mention his personal political clout to help straighten things, will probably lead to some treaty sanctioning an overall closeness as desirable.
Fair point. The relationship between Italy and Piratini would be one that people in both countries would actually remark upon and see as a good thing. There would be some formal cooperation, but that would probably be less important than the sentimental regard the citizens of each country would have for the other - the unwritten alliance would be stronger than the written one.
EDIT: it's likely that TTLs Uruguay and Argentina will be a bit less Italian than OTL. I still lack numbers, but I think that in both countries, Italians were the more numerous immigrant community, followed in Argentina by Levantines. In this TL, Germans and Eastern Europeans may end with a higher proportion there with more Italians going to Piratini instead and Brazil absorbing a generally larger quota of immigrants all over, and less Levantines have reason to migrate (possibly a little less Italians too but it has to be seen). OTOH, probably more Germans will migrate; though I don't see a Germanized Uruguay for example, German culture will likely have a larger place throughout the Platine region.
On the other hand, Piratini isn't that big, and there were a lot of Italian emigrants during the second half of the nineteenth century. I'd also guess that Piratini won't be very industrialized, and that many Italians would go to São Paulo or Buenos Aires because there are more jobs. Not to mention that Brazil in TTL is offering incentives to Catholic immigrant workers, which would draw some immigrants in that direction.
I agree that there would be
some diversion of Italians to Piratini, and they might become a plurality or even a majority there, but plenty of them would still go to Brazil and the Southern Cone, and I'd still expect Uruguayan and Argentine culture to be substantially Italian-influenced. The Germans would have a presence throughout the region, including Piratini where their OTL settlement dates to the 1820s.
The Levantines would definitely go to Argentina and Uruguay - in TTL, they'd probably be joined by Balkan Christian immigrants. The Catholic preferences might lead to fewer Arabs in Brazil, though.
And there's also the politics of an independent Entre Rios. The sensible thing to do is a regional block of Piratini, Uruguay and Entre Rios (who'll share a similar gaucho culture, at least to a point) that tries to balance both Argentina and Brazil and sort of leans towards Paraguay as the obvious alternative; but border bickering and diverging interest may prevent that, as Entre Rios will see a threat in Paraguay almost as much as in Argentina, while Piratini would be largely concerned with Brazil.
Thus far, their relationship has been a series of temporary alliances against whoever was the biggest threat of the moment, but the Third Platine War has tamed Paraguay somewhat, and the Great War may cause unpredictable developments.
I really doubt you'd see something as sweeping as what you're proposing; e.g. a liberal ruler that works with both the Bonapartists and Savoyards towards Italian political unification under the Papacy. Beyond the fact that I doubt you'd get the Church behind it, the Savoyards would never accept such a plan. By 1878 is too little, too late for such a proposal.
Not to mention the question of precedence: the Savoyards wouldn't want to be second within their own kingdom, while the Pope would never agree to be subordinate to any secular king. So I agree: a few faltering attempts at union, but no resolution until the 1890s.
As I've said before, the London-Berlin axis would have to make a good show about offering tangible aid to bring the Italians to their cause in the war, but they'll certainly have plenty of carrots to dangle in the Savoyard's eyes to try and lure them in - certainly more than a liberal, Imperial, France could, realistically, offer in return.
Neutrality is safer, but Italy as well as North Germany here will have a serious feeling of unfinished business with both Austria and France and is likely to be going to pick a side, especially if Crispi is in charge.
This Great War seems hardly ideological, but from an Italian POV, the Franco-Austro-Russian side is likely to be seen as the most reactionary of the two. So my bet is that Italy will reluctantly chose the riskier path: land war in the Alps from more or less the beginning, in the context of a pre-existing alliance with Britain and North Germany, to get Rome (that's going to be easy) and other irredenta, including Nice and probably Corsica. Eritrea might be in the cards as a secondary war aim, though probably not an achieved one (and few will care anyway).
Well, the ideal for Italy would be to stay neutral in the main conflict while using France's distraction to grab Rome. But even a limited war against Rome would require full mobilization, because Italy would have to guard the frontiers just in case France and Austria decided to invade. It would be very easy for the French and Austrians to interpret the mobilization as a threat and respond accordingly.
Also, Britain and North Germany - especially the latter - would want Italy on their side. If the Franco-Russian-Austrian military planners have any sense, they'd realize that the best way to win the war is to win quickly, because a long war would bring the German and British industrial superiority into play and give Britain a chance to build a land force. So the first months of the war would involve the Catholic alliance trying to overwhelm the North Germans with sheer numbers while keeping the British and Ottomans at bay. I think Falecius' outline of military planning is more or less correct. This means that the first few months of war would be fought on the defensive, on North German soil, and the Germans might promise almost anything to Italy if it takes some of the pressure off. If Italy figures that it will end up at war over Rome anyway, then it might jump in very quickly.
I've wondered before if there would be significant effects of the various Church thinkers contemplating the alt-forms of Islam. In particular, we have a stronger Ottoman state, and barring major changes in course we expect that Islamic empire to be allied to the North Germans and British in the coming war, pitting them against France and Russia, and if I haven't lost track of things, Austria.
So a monkey wrench would be if the Catholic Church is more vitrolically hostile to Islam across the board ITTL, which will have effects on how a still strongly Catholic France and Italy (no matter which side the Italians take in the war) deal with Islamic populations. Arguably it couldn't be much worse than the choices made OTL, and presumably in France at least there would be anti-clericists who might in reaction actually wind up more friendly with Muslims.
The complicating factor in France would be that Muslims have been serving in the French army for almost forty years. Some of the soldiers protecting the Pope are Muslim! As we've seen in the last French update, this has given the Muslim West Africans a very complicated relationship with the French right - some of the more populist and militarist elements on the right are pro-African and hence tolerant of Islam.
But I agree that, as Falecius says, the Church overall would see Islam as a subversive modernist influence and would oppose it more strongly than OTL. This couldn't help but influence the Catholic parties in France and Italy. It might affect Portuguese colonial policy too - there aren't many Muslims in the Portuguese colonies, but they might put restrictions on Muslim merchants and forbid proselytizing.
There would certainly be some dissent within the Church, especially among the more liberal faction; the war might, as you say, shake things up somewhat.
I see Italy marginally stronger and better off than IOTL overall (not very high bar indeed) obviously focused on getting Rome, with a more liberal streak in her politics, that get messier as a consequence, and, if wolf_brother is right in that Rome won't be resolved easily or quickly, Italy might be the place where TTL's *Kulturkampf takes place.
That's actually a very interesting possibility - if the Pope and the Catholic powers are the obstacles to completing the Risorgimento, then Italian politics might develop a strong anti-clerical streak. If TTL's more pragmatic Garibaldi becomes a more powerful political figure in the 1860s and 1870s, he might be a leader of the anti-clerical faction. Do you have any other ideas for who might lead this movement?
We also don't know if the sphere of interest in Tunisia that the Powers have given Italy ITTL has evolved into some sort of protectorate; I think that any colonial move of substance might be highly divisive in Italy here, even more so than OTL.
There was a steady influx of Italians to Tunisia throughout the nineteenth century in OTL, and I don't see that changing in TTL, so I'd expect that there would be a consensus within Italy to protect the national interest there. I doubt that Italy would make Tunisia an outright colony - more likely it would be a quasi-protectorate with extraterritorial rights for the Italian settlers.
Also, note that North Germany and Britain are Protestant, the OE is Muslim; no power in this alliance will care about the Pope, as opposed to Austria, France, Bavaria and Brazil (all of them Catholic powers) on the other side. That could add a nasty streak of religious war to the mix, which might affect Ireland in generally ugly ways. (OTOH, liberation of Poland could well be a secondary war aim for the Anglo-Germans).
A remark on Poland - I'm not sure whether the British-Prussian alliance would be going for an independent Poland as a war goal. Although instigating Polish unrest may weaken Russia and AH, Prussia has significant Polish-speaking territories at this time and would not want to give them wrong ideas, and I don't think Britain would be too enthusiastic about fuelling the nationalism of a Catholic people. I can only see support for Polish independence as a desperate measure in case the British-Prussian alliance would be clobbered by Russia / AH in the East and would be clutching for straws.
I doubt the North Germans would voluntarily give up Posen, but they might think they can control Polish nationalism, or even that an independent Poland carved out of Russia will provide an outlet for the Polish nationalists in their own territories. I could imagine them thinking of a
dependent Polish nationalist movement as more a tool than a threat. They wouldn't necessarily be right, but plenty of countries have made similar miscalculations in OTL.
Besides, one of the ways to break the trench-warfare stalemate is to stir up trouble behind enemy lines: a Polish (or Irish, or Kazakh, or Arab, or Czech) uprising is potentially an excellent way to relieve some of the pressure on the main front. By the end of the war, nearly everyone will be inciting each other's minorities, and I don't think the Poles would be an exception.
I definitely agree that there will be a religious overtone to the war, especially among the more reactionary politicians on the Franco-Russian-Austrian side. And that would really put Ireland in a whipsaw. On the one hand, cooler heads would say "support Britain now and demand concessions later," but others would be whipped into a crusading fury, and you can guess which ones would get the French arms and money.
Scholarship by people like Renan or Goldziher (the latter, as a Jew, likely to become Ottoman citizen here) will be very, very different. The equivalent of the Renan/al-Afghani debate should be interesting reading (by the way, what's Jamal al-Din al-Afghani up to TTL? Introducing Abacarism into a Shiite frame in Persia?).
Thanks for introducing me to these names! Al-Afghani could definitely be one of Islamic modernism's bridges to Persia, although I think he'd be more likely to espouse Ottoman and Egyptian liberalism (especially the latter, which would mesh with his OTL ideas about the harmony of religion and science) than Abacarism. The Abacarist influence in Persia will come in via the Hadhramis and Central Asians, and there will also be cultural exchanges via the Caucasus.
Anyway, I hope to have the last 1892 map posted tomorrow - I've had a minor tech nightmare at the new office which has sucked up most of the free time I'd hoped to have this week, but it's mostly done now. After that, it will be time to move on to bigger and not-at-all-better things.