lol, I remember playing a political simulator called "Superpowers 2" and we decided to, as America, invade this country called "Oman" and it pissed off the entire world. So every world power diverted their military might, America bound.....EXCEPT for Australia.
In the game, Australia is like "Oh shit, guys, you have thousands of naval war-ships traveling across the Pacific towards you...what do!?" and by that time, we were being invaded from all over...The United Arab Emerates somehow got Texas, and the East Coast was just totally lost....so we diverted everything we had to flee America and occupy Australia, and they were like, "Um...we don't like that very much, could you please gtfo"
Then all the world powers that were too late to claim some mainland US decided to redirect to Australia to clean us out, and Australia was like "SHIT. SHIT. GET OUT GET OUT" and we were like "Ignore. Ignore. Ignore." and finally Australia initiated a ground war with the remnants of our US forces, while we're getting naval bombardments from Russia and Japan, aerial strikes....shit was over in a couple of in-game days.
.....Yeah, so my point is, Australia would probably be on our side more than anything. But they wouldn't put up with our shit, probably. Finders keepers! That shit's theirs to keep.