The US was feining to drop a nuke in every country they invaded and failed to take over. The nukes in Japan were supposed to be a warning to the Soviets and the rest of the world of who runs the world order now, and the Soviets’ advancement in nuclear technology prevented that from happening, at least for a good while. The overt and covert barbarity shown by the US in subsequent operations showed that it had no qualms about adding more to the list of 200,000.