Oooo, ok! I do have an article regarding Australia as it pertains to this world, but the main POD has been since the Great War, or the alternate WW1. I do have ideas for Australia with the rising global tensions that I am working on right now, but I will definitely go back and look at things like the Eureka Stockade to see if that plays any pivotal role into how this alternate Australia would operate. Thank you for the suggestion, and I will get to work!  

https://en.wikipedia.org/wiki/Gallipoli_campaign   This may also be of interest to you :P

That's definitely noteworthy! I've been looking at the bombing of Darwin recently for speculations

Alright, so I haven't forgotten about this. I was just focusing on SC for now, but I'm still looking at ideas. One possibility is Australia declaring itself a Republic during what I'm developing as the World War

I wrote a little more about the alternate Australia. Inspired by the Eureka Stockade as Asmo suggested, I have the burning of the Parliament Building