https://en.m.wikipedia.org/wiki/Umayyad_conquest_of_Hispania https://en.m.wikipedia.org/wiki/Umayyad_conquest_of_Hispania Or, if we want more recent history, t

https://en.m.wikipedia.org/wiki/Umayyad_conquest_of_Hispania https://en.m.wikipedia.org/wiki/Umayyad_conquest_of_Hispania Or, if we want more recent history, the Bosnian war or even the currently ongoing dispute between Armenia and Azerbaijan. If you squint, you might even be able to include sect-on-sect violence which seems like several hundred years of European history, to the point that a group of religious practitioners crossed an ocean to escape it.