To top that one off, an area that is disputed by everyone in it!
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Few years were as important for the populist movement as 1900. A populist candidate won in a US election, the Prussian absolutists were ousted, the Habsburg Empire was forced into the Imperial Confederation of the Danube with significant amounts of autonomy for the various kingdoms, and the Tsar's regime collapsed.
Of course, not all was pleasant in Mother Russia. Filibusters from around the world set up their own states in the former empires--and the death of Tsar Alexander IV and his family caused many of the powerful nobles and landowners of the empire to impress the local peasants into an army and declare their own Tsardoms.
Strangely, one of the earliest areas of stability was the Caucasus region--the local lords swore fealty to the Tsar in Astrakhan, Nicolas I Bazin. However, Nicolas's death in 1907 caused his empire to begin its disintegration into petty states. Russian lords founded the Tsardom in Sevastopol and the Kingdom of Georgia, Muslim revolts built states like Chechnya, the Hashimid Shahdom, and utopian Caucasian socialists created the Union of the Caucasus.
With all this tension, it made perfect sense that by 1910, when the Union of the Caucasus invaded the ancient Ottoman Empire, revolts would already be spreading across that nation. Danubia, finding itself all the stronger for its new system and the undisputed ruler of central and eastern Europe (along with its Bavarian lackey), allied with the Greeks to reconquer the city of Constantine--though Vienna wasn't willing to even let Athens take more of than West Thrace.
The Unionists were defeated, naturally, but with the war in the west, the Ottomans weren't able to hold the dominant Arab portions of their empire; Mesopotamia was annexed into Iran, and the Saudi dynasty took control of all non-British Arabia and some of Jordan (an expedition of radical Zionists seized control of the Palestine region quickly, including swaths of OTL Jordan. It's less hated than OTL, and London likes having a pro-british counterweight in the region). However, the biggest problem for the collapsing empire was the Armenian rising, started by the Armenian-American millionaire Abisak Kasabian and funded by a group of Armenian millionaires in London and New York.
Not to be outdone, George Parthenou, a Greek-American billionaire, set himself up as the Grand Duke of Trebizond in 1911.
The Most Serene Republic of Baku revolted from a rather anti-business Shah in 1904. It's not the most stable nation in the region, but its better than Chechnya.
In 1918, the region has quieted down. The Bakunian Secession has become merely a border war, and the Iranian intervention in the region has effectively forced the Hashimid Shah to agree to an armistice. The Georgian-Unionist war has turned into a standoff, and only in the militia-controlled areas of the region does extreme violence continue.
Armenia and Trebizond have taken two different paths on their way--Armenia has begun to terrorize its Islamic population into peace, in part by separating them from the Armenian minority, whereas the Grand Duchy has taken the path of forced expulsion and occasional amounts of ethnic cleansing. The Great Powers tut about it, but don't do anything.
The Ottoman Sultanate has stabilized, and Suleiman the Deliverer now has an iron grip on his realm, and is looking towards some of his empires former lands, quietly sponsoring Islamic revolts in Armenia and subverting the Sultanate of Syria to his own wishes--two very successful ploys.
Despite all this, the region's claims overlap, and the engines of war are never all that far away. Georgia, the Hashimids, Baku, and Trebizond are all doing their individual bests to bring in the Great Powers on their side, hoping that that is all it will take to tip the balance.
And, of course, the various Tsardoms are all vying for power--and the most legitimate, in Sevastopol, just so happens to be in a perfect position to take its birthright.
The year is 1918, and all it will take to redesign the maps is one little spark.
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