Yes, you’re correct. During the Cold War, the primary strategy was deterrence, which meant that nations, primarily the US and the USSR, built up substantial nuclear arsenals not with the intention of ever using them, but to deter the other from attacking. It’s based on the principle of mutually assured destruction, which suggests that no rational actor would initiate a nuclear conflict knowing it would lead to their own destruction.
Russia’s use of a nuclear-capable missile, if they were to employ one in an actual conflict scenario, would represent a significant shift away from this doctrine. However, it’s essential to remember that the mere possession or testing of nuclear-capable missiles doesn’t necessarily imply an intent to use them. Countries often maintain and showcase these capabilities as a means of power projection and deterrence.
It is essential for all nations to follow the international norms and agreements in holding their nuclear arsenal to prevent any misuse that might lead to catastrophic damage and potential escalation to a nuclear war. International diplomacy and conversation are the keys to maintaining global peace.