Sector 21505
Sector 21505 was a region of space in the Alpha Quadrant. This Cardassian sector contained the Cuellar and Kelrabi systems. 

In 2367, the rogue starship  assaulted several targets in this sector, including a research station in the Cuellar system. The  entered this region by order of Starfleet to assist the Cardassians in locating the Phoenix. The Phoenix successfully destroyed two Cardassian ships before it was stopped by the Enterprise-D. ()

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