Yan Nebula

The Yan Nebula was a region of space in the B'Moth sector, located in the galaxy's Beta Quadrant. The green nebula lay within the borders of the Klingon Empire. Since 2292, the nebula was been a site of constant patrols and skirmishes between Klingon and Romulan ships. 

History
In 2292, a twenty-five years-long alliance between the Klingon Empire and the Romulan Star Empire came to an end with a battle between the two powers in the Yan Nebula. 

In 2409, the Tal Shiar-controlled Romulan Star Navy returned to occupy the Yan Nebula. From that time onwards, Lieutenant Commander was responsible for directing KDF ships to track the Romulans in the nebula, and route its forces. 

Locations

 * unnamed yellow dwarf star