I suggest reading the whole article, but at least this part. Note that in addition to tactical nukes, he mentions generating a limited EMP.
www.theguardian.com
The nuclear option that has been most frequently discussed in the past few days involves Russia using a small nuclear weapon (a “non-strategic nuclear weapon”) against a specific military target in Ukraine. Such a strike might have a military purpose, such as destroying an airfield or other military target, but it would mainly be aimed at demonstrating the will to use nuclear weapons, or “escalating to de-escalate”, and scaring the west into backing down.
Some analysts have questioned Russia’s ability to actually carry out such an operation, given its lack of practice. Unfortunately, this isn’t the only or even the most likely option available to the Kremlin. Based on war games I ran in the wake of Putin’s 2014 invasion, a more likely option would be a sudden nuclear test or a high-altitude nuclear detonation that damages the electrical grid over a major Ukrainian or even Nato city. Think of an explosion that makes the lights go out over Oslo.
Those war games indicated that the best US response to this kind of attack would be first to demonstrate US resolve with a response in kind, aimed at a target of similar value, followed by restraint and diplomatic efforts to de-escalate. In most games, Russia still responds with a second nuclear attack, but in the games that go “well”, the United States and Russia manage to de-escalate after that, although only in circumstances where both sides have clear political off-ramps and lines of communication between Moscow and Washington have remained open. In all the other games, the world is basically destroyed.
Even in the better case where both sides take their fingers off the triggers, the nuclear taboo has been broken, and we are in an entirely new era: two nuclear superpowers have used their nuclear weapons in a war. The proliferation consequences alone would be far-reaching, as other countries accelerate their nuclear weapons programs. The very fact that the nuclear taboo had been broken increases the odds that the nuclear threshold is crossed again in future conflicts, not just between Russia and America, but also with China, between India and Pakistan, in the Middle East, or elsewhere. Even this outcome in which the world is “saved”, the United States is far worse off than it was before the war in Ukraine broke out last month.
I’ve studied all the possible trajectories of this war. None are good | Christopher S Chivvis
There are two likely paths: continued escalation, potentially across the nuclear threshold, or a bitter peace imposed on a defeated Ukraine
