Eastern Europe is fairly unique. It is one of the most murderous places on earth. Ukraine, Poland, the Baltics, Belarus, etc.
For hundreds of years it has been nonstop war, invasion, pogrom, Stalinism, Nazism, Banderism, etc.
There are very few places that compete for it’s title for sustained mayhem. It is even generally known as the bloodlands.
It’s been almost 80 years since all that.