Unclassified RAND war games indicate that Russian forces could overrun local defenders and the light U.S. and NATO units currently able to respond within as few as two days. While the capitals and a small number of key points could be held for some time, Russian forces could seal the border between Lithuania and Poland, prevent reinforcement by sea, and confront NATO with a fait accompli.
Once secured, these territorial gains would be defended by heavy ground forces occupying the conquered states, along with very capable Russian anti-air and anti-ship defenses on Russian territory. Any serious attempt to liberate Estonia, Latvia and Lithuania would entail attacks to suppress these systems.
If a Russian invasion of the Baltic states could not be deterred or defeated, the North Atlantic Council and the U.S. president would be faced with a very unpleasant choice: conduct a costly counteroffensive and risk nuclear escalation, or abandon the Baltics to renewed subservience to Moscow.
"Stop Putin's Next Invasion Before It Starts", World Report
Now how is this so familiar?
This has its greatest potential in sudden flare-ups of border conflicts à la South Ossetia as well as in regard to a Ukraine breakup scenario or a Baltic coup de main scenario.An aggressor might see his chance in a coup de main (strategic surprise) coupled with deterring a counteroffensive with fait accompli and nuke threat. Would we really risk WW4 armageddon if the Russians had overrun and annexed Estonia by next week? Would we launch a conventional offensive to liberate it? Russia ain't Iraq, it has nukes. A low force density counteroffensive might actually stay below this deterrent 's actual threshold (this idea would require a lot of elaboration, of course).
I disagree with their recommendation, though. Too much dislike for tripwire forces.