Domen
Misico dux Vandalorum
Domen, Russia has exactly the same rights to possess Kaliningrad district, as Poland has rights to possess its current territory.
One question:
Does Russia have more rights to possess Moscow than Poland to possess Warsaw?
Just a reminder, in Middle Ages Spain and Portugal divided whole planet to their spheres of influence.
But no other state or nation or tribe recognized this.
Just like there was no recognition for the Soviet possession of Lithuania, Latvia, Estonia - see below.
In short: agreement is made, Finland, Estonia and Latvia are to belong to USSR.
Nope, mate:
http://en.wikipedia.org/wiki/Helsinki_Accords
(...) Considering objections from Canada, Spain, Ireland and other states, the Final Act simply stated that "frontiers" in Europe should be stable but could change by peaceful internal means.[9]:65 U.S. President Gerald Ford also reaffirmed that US non-recognition policy of the Baltic states' (Lithuania, Latvia and Estonia) forced incorporation into the Soviet Union had not changed.[10] Leaders of other NATO member states made similar statements.[9]:65 (...)
So the Helsinki Accords only admited that the Red Army was occupying the Baltic states.
Which was a fact and could not be changed without a military conflict at that time. And nobody wanted a military conflict or had enough power to push the Soviets back from the Baltic states by force.
But it did not recognize the Soviet supposed (i.e. self-proclaimed) right to incorporate those countries.
Just like no other state recognized the Spanish and Portugal self-proclaimed right to entire Earth as established in the treaty of Tordesillas.
Which is one of reasons why all modern countries which exist in South America - and which were once Spanish or Portugal colonies - were recognized by other countries. So was the USA, which rebelled from the English colonies in North America.