For American and/or Russian public - yes. It's not a part of the national histories. For German public and especially Polish (for what sin did God punish us?) -it's not peripherial.
The Kaliningrad district, by the way, is the wealthiest region of Russia, its traffic jams filled with luxury cars, I’ve read, while the citizens driving to shop across the border to Poland where prices are lower.
It's not so. The wealthiest region of Russia is Moscow city. People driving abroad for shopping are in any border province (St. Petersberg - Finland, Smolensk - Belarus, Vladivostok or Khabarovsk, - China and even Siberia -Kazakhstan).
There is nothing you don’t know better, is there?!