Russia’s use of a nuclear-capable missile is a clear departure from Cold War doctrine of deterrence

CNN —

Russia’s use of a nuclear-capable ballistic missile on Thursday is the latest escalation in the Ukraine war.

It also marks a decisive, and potentially dangerous moment in Moscow’s conflict with the West.

The use of what Vladimir Putin said was a ballistic missile with multiple warheads in offensive combat is a clear departure from decades of the Cold War doctrine of deterrence.

Ballistic missiles with multiple warheads, known as “multiple independently targeted reentry vehicles,” or MIRVs, have never been used to strike an enemy, experts say.

“To my knowledge, yes, it’s the first time MIRV has been used in combat,” Hans Kristensen, the director of the Nuclear Information Project at the Federation of American Scientists, said.

Aftermath of Russian missile strike in Dnipro, Ukraine, on November 21, 2024.

Ballistic missiles have been the underpinning of deterrence, offering what is known as “mutual assured destruction,” or MAD, in the nuclear age.

The thinking is, if even a few missiles survive a nuclear first strike, there will be enough firepower left in the opponent’s arsenal to wipe out several major cities of the aggressor, therefore ensuring neither side is unable to escape the consequences of nuclear actions.

In that vein, ballistic missiles were designed to stand sentinel over a future where nuclear arms would never again be fired in anger.

But analysts, including Kristensen, argue that MIRVed missiles may invite, rather than deter, a first strike.

The highly destructive capacity of MIRVs means that they are both potential first-strike weapons and first-strike targets, Kristensen and colleague Matt Korda at the Federation of American Scientists wrote in a study published in March.

That’s because,