Soviet tactical nuclear warheads used in the 1960s, with a yield of up to 10 kilotons, and a range of up to 32 kilometers. Nuclear Weapon Archive
2. The Expected Butcher’s Bill
The Pentagon’s planners expected 18,500 American casualties in the first ten days of an invasion of Cuba, assuming no nuclear explosions. However, unbeknownst to planners, the Soviet forces in Cuba had tactical nuclear weapons, and Soviet leader Nikita Khrushchev had preauthorized the local Soviet commander to use them at his discretion if he deemed it necessary. As the crisis intensified, Khrushchev withdrew release authority and forbade their use without his express permission. However, whether the modified orders would have been followed, is debatable.
In practice, tactical nukes were dispersed throughout Cuba to various Soviet units, physically controlled by officers as low down the chain of command as captains. Soviet forces had drilled in the use of those weapons as part of their defensive plan. In the heat of battle, the custodians of those weapons would have been under intense pressure as they were subjected to overwhelming US aerial strikes, naval bombardment, and ground attacks.
Kennedy and Khrushchev during the Cuban Missile Crisis. Eniclopedia Historia
1. The World Dodges a Bullet
If JFK had accepted the Pentagon’s advice and invaded Cuba, the results could have been horrific. It is not difficult to envision a desperate local Soviet commander in such a scenario, perhaps cutoff from communications with higher authority, resorting to the tactical nukes at hand to save his command, or at least ensure that its demise did not come cheap. The Red Army, with victory in WWII only 17 years in its past, did not lack military pride or an ethos of defiance unto death.
If the Soviets had used nukes in Cuba, the US intended an overwhelming nuclear response. Things could easily have escalated from there to a full blown nuclear exchange that would have devastated both countries and Europe, irradiated the Northern Hemisphere, and set humanity back centuries. Fortunately, JFK resisted the pressure from his generals and admirals, and relying on diplomacy, back channels, and blockade, successfully diffused the crisis without triggering WWIII.
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Where Did We Find This Stuff? Some Sources and Further Reading