Alpha Onias system
The Alpha Onias system was an uninhabited but strategically significant planetary system in the Beta Quadrant. This system, located within the Onias sector, was located near the Romulan Neutral Zone in the mid-24th century. 

In 2256, this system's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the . ()

In 2257, during the first , this system was occupied by the Klingon forces. () 

In 2367, subspace anomalies were detected in this system, originating from Alpha Onias III. As there had been rumors about a secret Romulan base in the region for quite some time, the  proceeded to investigate it further. (.

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Romulan Neutral Zone
Star systems