For example (I'm not asking for the plausibility of these; I'm just giving examples), Turks migrating into continental Europe and Christianizing, or Germanic peoples migrating to Asia Minor and setting up a state there, or the Slavs taking over Western Europe.
What are some weird/interesting migrations that could have occurred in continental Europe?
Use whatever definition of weird/interesting you'd like; the migrating ethnic group can be from anywhere, but...
1) They must settle in continental Europe, ideally in a part of Europe that's part of the modern-day European Union.
2) They must be concentrated, and form an independent nation-state at some point. Can be an independent state from the beginning like France, sporadically independent like Slovakia or Poland, or independent only in the modern era like...I don't know, Slovenia? Minorities split off from the nation-state, like the Hungarians in Romania, are fine.
3) Any ethnic group will do, but you get extra points the further you get from Indo-European. Points will also be awarded for long-distance migrations.
4) It's not required, but it'd be nice if the resulting nation-state were significant to European politics and history.
5) Nothing before, say, around the time that that Jesus fellow got crucified.
6) Something like the Visigoths in Spain or the Franks in Britain doesn't count.
What are some weird/interesting migrations that could have occurred in continental Europe?
Use whatever definition of weird/interesting you'd like; the migrating ethnic group can be from anywhere, but...
1) They must settle in continental Europe, ideally in a part of Europe that's part of the modern-day European Union.
2) They must be concentrated, and form an independent nation-state at some point. Can be an independent state from the beginning like France, sporadically independent like Slovakia or Poland, or independent only in the modern era like...I don't know, Slovenia? Minorities split off from the nation-state, like the Hungarians in Romania, are fine.
3) Any ethnic group will do, but you get extra points the further you get from Indo-European. Points will also be awarded for long-distance migrations.
4) It's not required, but it'd be nice if the resulting nation-state were significant to European politics and history.
5) Nothing before, say, around the time that that Jesus fellow got crucified.
6) Something like the Visigoths in Spain or the Franks in Britain doesn't count.