That's not entirely correct. There was a debate among the Navy and Army about whether they should or not or whether isolation was a better option. In the end

That's not entirely correct. There was a debate among the Navy and Army about whether they should or not or whether isolation was a better option. In the end they opted for isolation because due to Australia's geography (vast unpopulated). There is little doubt that if Japan had succeeded in the Pacific War that they would have gone after Australia (and Indonesia). It would be silly to write them off. The entire war was predicated over control of natural resources for an imagined future Empire. https://en.wikipedia.org/wiki/Proposed_Japanese_invasion_of_Australia_during_World_War_II https://en.wikipedia.org/wiki/Proposed_Japanese_invasion_of_...