>>213633695
Well... since the Normans settled in France and switched to speaking French, it's possible that local French people living in Normandy also joined them in conquering England. Either way, I think the Normans and Romans show well what the concept of ethnicity in Europe is all about.
In East Asia, the Manchus conquered China, wiped out Han culture, and forced their customs and hairstyles, but eventually, the Manchus themselves were absorbed by the Chinese and lost their language. When such mixing happens repeatedly, identities are completely lost, and the owners of the language and culture become meaningless. This is probably the closest example to the European ethnicity.
Europeans mixed so much that it became impossible to clearly separate groups, so the concept of ethnicity or nation emerged as a way to make those distinctions. That's why I find European history so fascinating. It's not about boring political battles, but about various peoples coming together and having gangbang sex. How could it be boring?