Gordian Reach

The Gordian Reach was a sector located in the galaxy's Outer Rim Territories that contained the Yavin system, site of the Battle of Yavin above the moon Yavin 4 during the Galactic Civil War. It also contained the planet Arda.

Behind the scenes
The Gordian Reach was first mentioned in 1979 in Marvel Comics' Star Wars 25: Siege at Yavin, now part of the Star Wars Legends continuity. After many more Legends references over the years, the sector was confirmed to be canon by the reference book Ultimate Star Wars, which was released in 2015.