Breen space
Breen space was a region of space claimed as territory by the Breen Confederacy. 

According to Worf, the Breen "did not tolerate incursions into their space," while recalling the Klingon Empire's attempt to conquer , only to never be heard from again. () 

In 2367, the Breen were know to have outposts in Sector 97. The black cluster located in the sector was considered to be "quite a distance" from both Romulan or Klingon territories. ()

After Worf and Ezri Dax were picked up by the Breen on Goralis III in mid-2375, Dax wondered what they were doing at that planet, as she considered it to be "a long way" from Breen space. () Three days later, while still aboard the Breen ship, Worf reckoned that they could be in Breen space by now. Dax, however, mused that it was also possible that they saw their shuttle craft and were taking them back to Deep Space 9. It was ultimately learned they were both wrong, and they were in fact en route to Cardassian space. ()

Planets 
 
 Dozaria
 Portas V

Regions