Many say that this event (+ Sweden) checkmates Russia's ambition. Finland's border with Russia is 800 miles long. Its a long one. But it is so close to St Petersburg and Stalingrad. And USSR access to the Baltic sea will be severely limited. Finaldnd can threaten USSR.
In the past USSR under Stalin made pre emptive incursions into Finland and lost territories. But Finland despite maintaining neutrality, has built its defenses and continued conscription of male population into its reserve post. Finland failed to neutralize Russia when it joined forces with Sweden.
Finland decided to join NATO when USSR invaded Ukraine.
What will happen to balance of power in Western Europe/Russia. It is in stalemate with Ukraine. Putin lost out in Middle East with fall of Syria. This has considerably weakened Russa And now Finland joining NATO? And to think that Russia's economy too has faltered, and armaments greatly diminished by war in Ukraine. Military ranks too decimated. Can it continue sable rattling....