Edited sentence: So now the northern part of the former East Prussia forms an island in the EU.Unfortunately, after all ethnographic problems in the incriminated region seemed to have been solved once and for all by Word War II and the following political and administrative measures, just in this region, and ironically involving just the population of the state, which was primarily persuing  these measures, a smaller, but analogous dilemma, analogous to the original one, has remained:.the (russian) population of the Oblast Kaliningrad (this is the northern part of the former East Prussia, now belonging to the Russian Federation), is totally surrounded, since 1991, by foreign states (Poland, Lithuania), which even belong to the European Union (since 2004)