What could be weirder than France and Germany being allies... with an 1870 POD?
Base map is not my own, but the main concept is. That is that Bismarck manages to convince the Prussian aristocracy and the king not to demand Alsace-Lorraine from France, but ask for French Cochinchina instead. The result is a less hostile France and Europe thus remaining friendly to everyone for a while... until the Congress of Berlin, when Germany and Austria manage to anger Russia, which is multiplied when Wilhelm II gets the reins. The end result is that Italy (hates Austria, and can't really fight France ITTL as it remains neutral), Russia and Britain (German dominance on the continent, you know) bond together against the Triple Alliance of Germany, Austria and the Ottoman Empire.
Peace reigns for years until the Moroccan Crisis of 1910 - After some provocation by the Moroccan sultan, France moves troops into Morocco, confident Britain won't intervene. Britain sends ultimatum. French discuss about a withdrawal, and eventually concede... but by then, British warships are already bombing the French. Only after the war it turns out there was some time zone confusion.
The war does not go over easy for Britain, or at least not as easy as they expected - France is a pretty formidable foe, and through some lucky break they even manage to conquer the Channel Islands. The British decide, "hey, we don't need to do this alone", and ask Italy for help. Italy declares war on France and mobilizes. Austria, terrified the Italians might attack them too, mobilizes as well. Russia demands that Austria backs down, they don't, everyone mobilizes, Germany is terrified of being caught off-guard and decides to initiate her war plan, they declare war on Italy... and the rest is history.
Germany rapidly invades Italy while keeping the Russian army occupied on the border. They defeat the Italian army, but find out that keeping the Italian people down is not that easy. After little over two years, they manage to defeat Russia, leading to Britain holding out on its own for a few months before finally yielding to an 'honorable peace' in late 1913.
This map shows the world in July 1914, after the last peace accords have been signed.
Key:
1. The war in Ireland is more brutal (if possible) IOTL, partly due to a British desire to compensate for their loss in Europe.
2. Random butterfly: Norway stays Swedish ITTL. Even if it is highly autonomous.
3. Russia manages to avert going communist, but has to pay the price: a bigger Finland that incorporates most of its basic territorial claims.
4. The Baltic Grandduchy, part of the German Empire. Come to think of it, they really should've asked the Estonians and Latvians what they thought about it.
5. A few French batallions keep Poland strong enough to avoid becoming a German puppet entirely - the French can't really trust Germany, after all. Their economy is basically dominated by the Germans, though.
6. Romania lost the war, but Germany and France didn't want to give Bessarabia back to Russia. If the Romanians behave, there'll be a plebiscite here in ten years.
7. A different Berlin Congress means different alliances. Serbia is a puppet of the rapidly weakening Austro-Hungarian Empire, who in all honesty can't sustain all these conquests.
8. Greece lost the war, but that's the last of the concerns in Athens right now - Socialist Italy looks much more threatening.
9. The Social Republic of Italy, comrades! Our proud republic was founded when the vile treacherous government decided to make peace after half of our army was imprisoned when the Germans and Austrians charged for Venice in the early weeks of the war, cutting off most of our armed forces. A few local defeats elsewhere did the trick. The Italian government needed to sue for peace, but the people didn't like that - nor the enormous reparations that Germany and France tried to impose even as the war was still on-going. A few lucky breaks for the socialists later, and the Social Republic of Italy is established and has managed to frighten the Austrians into withdrawing their occupation forces. The Germans think the socialists will collapse anyway, but they're wrong. Fortunately, though, the socialist ideology preached in Italy is a lot more moderate than Leninism or Stalinism.
10. The government in Turin thinks they represent Free Italy, but in reality they're just a buffer for the French.
11. For starting the entire war, Morocco got off pretty easy - they've only become a French protectorate.
12. Malta was seized in the general quest against imperialism during the later stages of the war, and the Brits are a bit too distracted to ask it back.
13. Libya was never conquered by Italy ITTL (they got a bigger East-Africa instead, or at least they had one until the Germans seized it in the war) and is one of the Ottomans' most loyal provinces. And they could use a little loyalty every now and then, considering their other puppets...
14. ... including Armenia. They're a little unsure whom to hate more: the Ottomans, the Russians, or perhaps the puppet government the Ottomans installed?
15. After some financial compensation, the bisshop of Urgell was more than willing to give up his half-principality to the Papacy-in-exile, as a French puppet. Like in the Baltic Grandduchy, no one really bothered to ask the Andorrans what they thought of it.