Well, to be fair, the SASR is based in Perth. But it’s a Federal installation and would be withdrawn prior to any succession so those filthy pr1cks can’t get their hands on all the cool SF toys. And then we would just turn up in a truck or two and declare the place annexed. Not a whole lot they can do about it.
The key to military operations within Australian Sovereign territory is to coincide with the right public holiday so everyone is drunk or hung-over when you arrive. In summary, drink, invade, public holiday, barbeque. Not necessarily in that order.