Yadalla Prime

Yadalla Prime was the prime planet in a system near the Romulan Neutral Zone.

Yadalla Prime was the location of a Romulan archaeological site suggested as a possible raiding target for a band of mercenaries working for Arctus Baran in 2370. . Starfleet Command anticipated that Baran might attack this planet so a Federation starship was sent there to intercept his ship. 

Background information
According to the script for "Gambit, Part I", the pronunciation for Yadalla was "yuh-DOLL-uh". 

Yadalla Prime was called Yonada Prime in early drafts of the episode, a reference to the worldship in the episode. The name was changed due to the need for Romulan origins for the planet. (Star Trek: The Next Generation Companion'')

According to Star Trek: Star Charts (p. 45), the Yadalla system was located in the Beta Quadrant. The primary of the system was a F-class star. In the ancient past, about 2,000 years ago, Yadalla was a destination on the Debrune trade route.

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