>>508787805
Prussia was established by Teutonic Order and is very much starting point of modern Germany. Autistic law-abinding that is identified with German way of life came from the Order.

Order took the name after Prussians they conquered. Exactly how Moscovians rebranded themselves into Russians when they start invading actual Ruthenians.

Btw originally "rus" meant non-Slavs of the east. Later it became synonymous with Eastern Slavs. "Russia" stole that name.