Yadalla
Yadalla was a planetary star system in Sector 2158 of the Beta Quadrant. A planet in this system, Yadalla Prime, was home to ancient Romulan ruins. This system, at the edge of its sector, was near the Romulan Neutral Zone in the mid-24th century.

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the 's ready room viewscreen. This system's symbol had a blue color, indicating that it was affiliated with the . () 

In 2399, the location of Yadalla was labeled in a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This system was in or near to space claimed by the Romulan Free State. () 

In 2401, the location of Yadalla was labeled on a star chart that was seen on the 's bridge viewscreen. The chart was used to show the location of the combined Starfleet-Borg armada and where it needed to go to face a galactic-level threat. ()

In 3190, the location of Yadalla was labeled on a star chart used by Commander Paul Stamets for tracking the movement of the Dark Matter Anomaly through the galaxy. ()

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Star systems