Also, Conventional weapons take great effort. One guy in N Korea with a nuclear weapon at his disposal vs Cuba and no nuclear weapon and we can see how difficu

Also, Conventional weapons take great effort. One guy in N Korea with a nuclear weapon at his disposal vs Cuba and no nuclear weapon and we can see how difficult it is to imagine Cuba posing a real destabilizing threat vs N Korea. W/o nuclear weapons, N Korea, in order to invade S Korea and overwhelm it would need millions of troops clothed and fed for months, logistical support, etc. A couple of bombs and the same is achieved without spending billions a month in maintaining troop and armaments levels.