The process can either be voluntary or applied through varying degrees of pressure.
The term can also refer to the historical Slavic migrations to Southeastern Europe which gradually Slavicized large areas previously inhabited by other ethnic peoples.
In northern Russia, there was also mass Slavization of Finnic and Baltic population in the 9th-10th centuries.
[1] After historic ethnogenesis and distinct nationalisation, ten main subsets of the process apply in modern times:
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