Latest POD to make either Serbia or Bulgaria the dominant Slavic power up to the present

What would be the latest POD to make either Serbia or Bulgaria the dominant Slavic power up to the present? I am thinking about a scenario where one of these powers expand northwards some time after the Mongol conquests of Kievan Rus. They would then take much of the area that was taken by Poland-Lithuania in OTL.
 

SRBO

Banned
Magyars don't get into Pannonia. This has massive effects as now slavs can spread orthodox influence further north, possibly preventing Czechia or Slovakia from becoming catholic. Not to mention the fact that back then Slav languages were more similar than today, you might see a massive monocultural slav state
 
Magyars don't get into Pannonia. This has massive effects as now slavs can spread orthodox influence further north, possibly preventing Czechia or Slovakia from becoming catholic. Not to mention the fact that back then Slav languages were more similar than today, you might see a massive monocultural slav state

Wouldn´t the Slavs in Pannonia be influenced by the Holy Roman Empire, just like the Hungarians were in OTL?
 
You'll need to severely weaken Russia, so that it stays divided until as late as possible and other powers grab Siberia instead.
 

SRBO

Banned
Wouldn´t the Slavs in Pannonia be influenced by the Holy Roman Empire, just like the Hungarians were in OTL?

They were initially influenced by Byzantium, especially Moravia, as the HRE were the "trilingualists" who considered that christian texts are only allowed in Hebrew, Latin and Greek. The Moravians saw the cultural subversion that was, that's why they asked Byzantium to send them scholars to develop a slavic alphabet so they can translate the bible, so Cyril and Methodius went there and created glagolitic. As byzantium weakened, the Germans got more and more influence, and after the Hungarians moved in they got cut off, and later Hungarians converted to catholicism instead
 
Magyars don't get into Pannonia. This has massive effects as now slavs can spread orthodox influence further north, possibly preventing Czechia or Slovakia from becoming catholic. Not to mention the fact that back then Slav languages were more similar than today, you might see a massive monocultural slav state
I did a flag challenge entry for an Avorak Stephanate which was essentially a Slavic Greater Hungary based on the Avar Khaganate.
So while it is a Slavic and possibly Orthodox empire it's still not the Serb/Bulgarian entity of the OP.
 
POD around 1250.

Mongols conquer much like OTL, but stop just short of subjugating the bulgars. The Mongol empire collapses quicker and into weaker successer states.

Second Bulgar empire expands into the power vacuum, including most or all of Pannonia, west to the Adriatic and east to the Dnieper. Develop a respectable navy.

Turks migrate into Anatolia weakening Byzantium. Bulgar empire finds some reason to claim the title as rightful successer to the eastern roman empire. Seize and hold all the Greek Balkans and some of the islands, maybe even including Sicily, Cyprus, maybe even Jerusalem.

Over next few centuries conquer Northwest to the Danube, up to or a bit past Vienna. Austria south of the Danube even now gas a South slav population.

Conquer up the Dnieper and Don basins.

Maybe grab parts or all of Moravia, Czechia, Poland , Anatolia, or Russia. Most of those would be hard but not impossible. getting all would be very hard. The Volga basin seems the most plausible, fellow orthodox Slavs, and historic territory of the Volga bulgars.

North Russian, central asian, and Caucasian polities as tributaries. Novgorod, Georgia, Siber, etc. Some might later be directly absorbed into the empire.

The remaining Slavs would be the catholic Lusats, Sorbs, Czezhs, Silesians, Poles mostly. If the germans behave as OTL those Slavs might be overwhelmed.
 
POD around 1250.

Mongols conquer much like OTL, but stop just short of subjugating the bulgars. The Mongol empire collapses quicker and into weaker successer states.

Second Bulgar empire expands into the power vacuum, including most or all of Pannonia, west to the Adriatic and east to the Dnieper. Develop a respectable navy.

Turks migrate into Anatolia weakening Byzantium. Bulgar empire finds some reason to claim the title as rightful successer to the eastern roman empire. Seize and hold all the Greek Balkans and some of the islands, maybe even including Sicily, Cyprus, maybe even Jerusalem.

Over next few centuries conquer Northwest to the Danube, up to or a bit past Vienna. Austria south of the Danube even now gas a South slav population.

Conquer up the Dnieper and Don basins.

Maybe grab parts or all of Moravia, Czechia, Poland , Anatolia, or Russia. Most of those would be hard but not impossible. getting all would be very hard. The Volga basin seems the most plausible, fellow orthodox Slavs, and historic territory of the Volga bulgars.

North Russian, central asian, and Caucasian polities as tributaries. Novgorod, Georgia, Siber, etc. Some might later be directly absorbed into the empire.

The remaining Slavs would be the catholic Lusats, Sorbs, Czezhs, Silesians, Poles mostly. If the germans behave as OTL those Slavs might be overwhelmed.

Would the Turks also take Constantinople in this scenario or would Bulgaria take it? If the Byzantine empire survives, the Bulgarian empire could not consider itself a continuation.
 
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