What if Australia had withdrawn from ANZUS in the 1980's?
Or rather, like OTL NZ adopted policies which made the US state that their ANZUS obligations were no longer operational.
For instance this could be an Australian refusal to have US nuclear-powered ship in Australian harbours or perhaps an Australian request for the US to withdraw their military bases from Aust territory.
In NZ part of the reason for the Lange govts policy was a desire of the Right of the NZ Labour Party (Lange, Douglas) to be given a free hand in neo-liberal economic reforms, if the Left's non-nuclear pacifist defence policies were also taken on board.
In Aust Hawke was more willing to negotiate economic reforms with the Left of Aust Labor, so such a trade-off was not as vital.
But it is still plausible.
What would the short-term and long-term consequences of such an Australian policy?