The Outback is the vast, remote, arid area of Australia. The term "the outback" is generally used to refer to locations that are comparatively more remote than those areas named "the bush" which, colloquially, can refer to any lands outside the main urban areas.
When the Race Colonists arrived in 1962, they heavily colonized the Australian Outback, finding the arid landscape familiar with that of Home. Here, Race colonization progressed uninhibited by the local inhabitants and flourished. During the Race-German War of 1965, Race cities were targeted by German ballistic missile submarines and although many were destroyed, the distance of the region from Germany meant that these cities weren't hit as hard as those in North Africa and Arabia.
By 2031, the ecology of the Outback had been overrun by flora and fauna from Home.