Russian army already has a fortress near the Polish border. It's called Kaliningrad region.
By the way, if Lithuania and Poland manage to trigger further escalation by blocking Kaliningrad transit, it will have most closely resembled the event that became an ignition point of the Peloponnesian War, namely, the Megarian Psephisma, as the deliberate cause of the outbreak of the war.
I’ve written a piece about further parallels between current proxy phase of the WWIII in Ukraine and the Peloponnesian War, though in Russian, which is my native language (altogether I speak and/or write in 5 languages). It possesses some specific moveable creative features well known to my subscribers, but these may confuse you to an extent, should you read it. So don’t rely on Google Translate too much. ‘’⌐(ಠ۾ಠ)¬’’’
In case you didn’t master Russian though, I could easily summarize the aforementioned piece. I stand by point that Boris Johnson, not Joe Biden, with his significant private interests there, nor Ukrainian nationalists, had had a prevailing hand in sabotage of the Istanbul peace agreement. In this, he inadvertently (?) repeated the mistake of Pericles, who advised the Athenians not to revoke the Megarian Decree. It didn’t come out well for Pericles, Athens, or Boris. And it won’t come well for Ukraine in this second sub-war since the invasion, even if NATO forces suddenly enter its territory. Currently UAF soldiers shall stand as lecturers at NATO war rooms and academies, not vice versa. ;)
More important, to me, is the crucial mistake of the US to oppose two apexes of Kissinger’s triangle simultaneously. It’s almost as if they began the Melian Dialogue before the Mytilenean Debate.
Finally, I recommend to you John Shirley’s A Song Called Youth trilogy as a quite visionary outline of the possible non-nuclear wide scale war in Europe, complicated with Nazism Revival and private military companies breaking loose. Written in 1980s during the Cold War I, this work of cyberpunk fiction still remains quite relevant, thanks to sleepwalking geezers in the Western and Eastern war rooms alike.
