There are many influential supporters of nuclear war, and some of these contend that the use of ‘low-yield’ and/or short-range weapons is practicable without the possibility of escalation to all-out Armageddon.
It is apparently widely believed in Washington that if a nuclear weapon is (comparatively) small, then it’s less dangerous than a big nuclear weapon.
In fact, the nuclear war envisaged in that scenario would be a global catastrophe — as would all nuclear wars, because there’s no way, no means whatever, of limiting escalation. Once a nuclear weapon has exploded and killed people, the nuclear-armed nation to which these people belonged is going to take massive action. There is no alternative, because no government is just going to sit there and try to start talking with an enemy that has taken the ultimate leap in warfare.
It is widely imagined — by many nuclear planners in the sub-continent, for example — that use of a tactical, a battlefield-deployed, nuclear weapon will in some fashion persuade the opponent (India or Pakistan) that there is no need to employ higher-capability weapons, or, in other words, longer range missiles delivering massive warheads. These people think that the other side will evaluate the situation calmly and dispassionately and come to the conclusion that at most it should itself reply with a similar weapon. But such a scenario supposes that there is good intelligence about the effects of the weapon that has exploded, most probably within the opponent’s sovereign territory. This is verging on the impossible.
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