harmonica
It was definetelly mass-murder and mass-displacement (war crimes) what the USA and their allies did do during and after world world war 2 in the areas of Europe, where in former times Germans had lived and in the area, which is today known as Germany. You additionally erased complete nations - as for example the Silesians or the Bohemians. A not realized idea of this time had it been for example to move Berlin to another place, because it would had been perhaps possible to rebuild Berlin again in a new place - on the old place it seemed to be impossible. This was all over Germany nearly the same problem. Germany was dead - it had absolutelly not any chance to survive any longer.
By the way: From this Germany of the year 1900 have today only about 1/3rd of all German children parents and ancestors.