Also worth noting that the force needed to occupy a country is mainly proportional to the population.
India and China are also reasonably close.
- India.
Also, Pine Gap. All of the China is coming and the US is going to leave us hanging out to dry hubbub conveniently ignores this fact.
All thats needed is to get several thousand armed people to take control of Canberra, Sydney and Melbourne parliament and hold all the politicians under lock and key. And whilst Australia is too stunned to work out what has just happened, land ships and troops in Sydney then Melbourne.
There you have it - control of Australia.
Several thousand armed people acting in concert without detection?
The Australian military would also still exist even if such a thing could be done.
Not to mention that then landing ships in Sydney and Melbourne would not be allowed by the US.
The Australian populace wouldn't just take it either.
You haven't heard of tourists?
And just to show you that they aren't messing around. They just funded the development of a port in Vanuatu which many have suspected as being suitable for future naval purposes:
https://www.smh.com.au/politics/federal/the-great-wharf-from...