It was revealed that during Cold War there was a plan to nuke all cities over 100k inhabitants anywhere in the world so that no civilization can restart anywher

It was revealed that during Cold War there was a plan to nuke all cities over 100k inhabitants anywhere in the world so that no civilization can restart anywhere. For example, some nukes on Ukraine were pointed to China, a somewhat ally of the USSR at that time. I don't think Australia can rely on being non-nuclear to escape if SHTF.