AHC/WI: East Germanic tribes staying in the Vistula

As it says in the title, can the East Germanic tribes like the Goths, Vandals, Burgundians and Gepids stay in the area around the Vistula, nowdays Poland, instead of migrating?

And if you think they can, what effects do you think this may have(assuming they don't go invading the Roman world)?

May they fill the vaccum left by the West Germanics, and move to their lands? Or will they just stay there and consolidate their culture and power? And how may this affect the future Balto-Slavic migration?

What do you think either of these may cause in the future development of both the region and neighbor zones?

And just for a last one, do you believe the Germanic religion has a better chance of surviving with a possibly bigger population of followers?
 
Did all of them migrate? Was East Germanic still spoken in the area between Oder and Vistula when the Slavs arrived?
 
Problem is that these eastern German peoples weren't probably formed* as peoples before they encountered Romania and constitued entities (and eventually identities) trough a process of ethnogenesis including Germans (both from Vistula and not), Dacians, Sarmatians, proto-Slavs and Romans.

In matters of identity, it was likely far more porous in Northern Europe before state-like features (as in Romans "identifying" one group as a people, helping to create infrastructures and identitary features).

It's not because the historiography of Romano-Barbarians peoples (which was far more about justifying their rule and prestige than actual historical work) tells about a demographical continuity that it's true.

* Or in the case of Burgundians, we're most probably before a case of a Western Germanic people eventually borrowing up the name without that much continuity. It's not that unheard of, just look at Cesarian and Late Antiquity Suebi.

If for some reason eastern Germans don't migrate (while the importance of these elements shouldn't be exaggerated : it doesn't seem to have been a vaacum) you'd eventually have another and quite similar people appearing out of various elements, while eastern Germans would eventually forming other peoples along Vistula, more or less as some did IOTL with Balts and Slavs.

I don't think the linguistic element would be that relevant eventually : IOTL it wasn't much once Barbarians settled around and within Romania.
 
The main reason of "poland" german migrations (vandals, lugians, burgunds etc) was change of climate - decline of temperature
As a result I think migration are determined

P. S. Sorry for my English
 
The main reason of "poland" german migrations (vandals, lugians, burgunds etc) was change of climate - decline of temperature
As a result I think migration are determined

P. S. Sorry for my English

I thought there were just some groups that emigrated from these areas and that those who remained later switched to a Slavic language due to large scale immigration of Slavs.
 
I thought there were just some groups that emigrated from these areas and that those who remained later switched to a Slavic language due to large scale immigration of Slavs.

According to results of paleobotanic researches in VI-th century fields of current poland, eastern germany were empty (excluding Baltic shore)
Procopius, saying about retuning of Geruls to their danish motherland also wrote about that they went through waste lands.
 
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