The Outback is a harsh and barren area within Australia, destroyed by lingering radioactive decay. This is the result of the detonation of a fusion power core, obliterating the facility that contained it and leaving its parts scattered far and wide.
The Junkers are the only known members of humanity that survive within this region, though most seem to be altered physically and psychologically by the radiation.
Well before the Omnic Crisis, the land was home to settlers and survivalists, solar farmers and those that merely wanted to be left alone. After the Crisis ended, however, the land was taken and given to the omnic people. The resulting battles between the displaced humans and the robots eventually resulted in the blighted landscape seen today.