Your goal is to get Russia to conquer all of historical Armenia from the Ottomans somehow and explain the effects of it.
Great !! A new Armenian TL !!
I agree with profxyz that a Russian-sponsored Greater Armenia stretching from Caucasus to Cilicia is too much....the demographics of the period didn't support that territorial extent, and IMHO in any case it would be unacceptable for Britain, interested in keeping the Russians far from the Med.
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But a territory from current Armenia to W of lake Van, is somewhat closer to plausibility.....provided that a mass population tranfer of Armenians from the rest of the Six Vilayets and an equivalent exodus of Muslims take place......maybe after a more succesful campaign against the Ottomans in 1878, and better outcome of the Berlin Treaty. A good starting point would be abc123't TL, a quasi post-San Stefano scenario, with Alexander II avoiding assasination and the Armenian Loris-Melikov still in office.
In any case, it must be noted that outright annexation of all this territory gives Russia full command of trade routes between Black Sea and Persia (an alternate route to Suez), something difficult to the Brits to swallow again..... in fact, TTL Brittish meddling in Otoman Armenian affairs happened just for preventing Russian encroachment.
Therefore, I think that the most plausible outcome is a Russian-sponsored autonomous Armenia, with Britons trying to undermine Trar's influence.
Here are some thoughts of my own about the matter
But it already WAS there OTL. Under the Soviets.
ISTR that it happened in the Turkish War of Independence.
What if Russia seized Greater and Lesser Armenia? How would that affect things?
Well, there would be alot more Armenians (and Greeks and Assyrians).
Would it be a direct province (Russian Armenia, Turkish Armenia, Pontus Greece and Assyria) or would it be a "protected" tribute state like the Kingdom of Georgia started out as?
That might make a difference. Just enough alliance with Russia to keep out most invasions from Persia or Turkey but not much direct oversight by the Czar/Communists would probably be the Armenian sweet spot.
I think there are Assyrians in Diyarbakir and southern Van vilayets.How Assyrians?
I think there are Assyrians in Diyarbakir and southern Van vilayets.
Yup. They still are.They still will have their northern Iraq community right?