Union Back Yard

General, not official term describing regions of space that have been colonized and developed for a very long time. While a back yard region is not the same as a core region, mostly due to the fact that a back ard region  lacks any major world or society center. The Back Yard region means usually a very quiet region in terms of events or activities. Provincial would have been an old pre astro term that has a similar meaning.

As an example the old Xunx expanse is considered a Union Back Yard