Germans were pretty good at exploiting ethnic grievances in multiple countries - Czhech vs Slovak, Croats vs Serbs, Bulgars vs Greek and Hungarian vs everyone that have nothing to do oppression and fight for homeland.
People underestimate what a clusterfuck of ethnicities pre WW2 Eastern Europe was. Resettlement after WW2 created much cleaner ethnic maps and arguably the reason we had 80 years of mostly peace (Yugoslavia was last country with mix of ethnicities and wars in 90ies cleaned up it too).
People underestimate what a clusterfuck of ethnicities pre WW2 Eastern Europe was. Resettlement after WW2 created much cleaner ethnic maps and arguably the reason we had 80 years of mostly peace (Yugoslavia was last country with mix of ethnicities and wars in 90ies cleaned up it too).