Europe’s borders have been miraculously stable since World War II. With the threat of nuclear war and the complete eradication of our civilization, the appetite for war and conquest has not been very high. We have seen glimpses of a different order in the Yugoslavian conflict, and more recently in Ukraine. Where parts of Donbass and the Crimean peninsula have joined the Russian community and participated in a long and bloody war against the Kiev regime that has tried to keep the country together.
AFAK, Germany was offered Königsberg by Russia in 1990, but rejected it. No chance now.