TiberiusCaesar
Banned
I'd like to intervene on this matter. First of all, the 18th century is 100 years. That's a long period. While the Ottoman Empire was hopeless in 1770, they were pretty equal in 1710. So no, Russia could not consign the Ottoman Empire to oblivion in the 18th century. I am giving you the benefit of the doubt and think you mean the late 18th century. Let's focus on that part.How history has proceeded? Russia has repetitively dominated and retreated from Balkan. It is almost frustrating to see. I'm convinced in 18th Russia could consign Ottoman to oblivion if unimpeded by other powers.
I've always wondered why Great Powers are so preoccupied to preserve balance of power to the last 19th century. They could simply carve out Ottoman and Persia and share spoils of division. It also seems they weren't interested in territorial claim of Egypt at all after expulsion of Bonaparte. Both Great Britain and France didn't want to occupy Egypt even in 1870s. Consequently, Middle East has been left uncolonized until the end of the First World War, despite of relatively sparse population and immeasurable potential benefits.
Russia had taken advantage in military terms, with regards to quality by the mid 18th century. In the 1735-39 war this became pretty evident. They could beat Ottoman Armies in field and occupy lands between the Dniepro and Pruth. It became easier in 1768-1774 as the Ottomans were quite powerless to drive the Russians out of the Danubian Principalities and Crimea. The cherry on top was the defeat in Kozluca (Suvorovo, Bulgaria) where the Ottoman Army got annihilated by a Russian Force 5 times smaller.
But there is a problem. Beating the Ottoman Army in field was one thing, consolidating their lands is another thing. Especially in the Balkans, which is pretty large. The only Russian operation prior to 1787 was in Suvorovo and that was to force the Ottoman Sultan to peace rather than conquer new lands. The Austrians got stuck in Serbia after 3 years and the Russians do not have the capacity to conquer and consolidate large swaths of land in the late 18th century, despite Ottoman weakness. This will only increase Ottoman resistance even more when the Austro-Russian Alliance wants nothing less than a full occupation of European Turkey, that includes Constantinople. In other words: a pipe dream.
I am not in favor of comparing something of 2022 with 1787. But in this case look at Ukraine. Russia has used 200.000 troops to invade Ukraine and Russia lacked the logistics to supply and succeed in the first months of war. The logistics lack for using even more troops needed to eliminate the Ukrainian resistance. In the 1780s the logistical train is far more inferior while the Russians (and Austrians) need far more soldiers than they used to accomplish the goal.
That's what makes Catherine's Greek Plan just an ambitious plan, and nothing more.
---------------------------------------------------------------
But for the sake of giving you an answer to your question:
A). Austria will annex Serbia and Bosnia, forming a principality in the less accesible Albania
B). Russia forms the Neo-Byzantine Empire in Bulgaria, Greece and Macedonia, including Constantinople.
Austria is better off. Despite stiff resistance in Bosnia, they can accomodate the local Ayans to a certain degree. Both Bosnia and Serbia will get Germanized to a certain point in the 19th century. Nothing more than Hungary.
This neo-Byzantine Empire is pretty unstable and will deal with lots of internal rebellions. It will likely follow a Latin Empire analogue except that the Russians will want to hold Constantinople, probay succeed too. The Russians will probably tolerate the formation of a Bulgarian and Greek kingdoms when this neo-Byzantine Empire falls apart. That is, assuming the local Ayans are eliminated to the last men.