The Ena was an ancient civilization that lived between 98,000 BCE (reference stardate −1,000/00) and 88,000 BCE (stardate −900/00).

The Ena civilization was centered in the Rimward side of the Orion Arm, in what was later the Klingon Empire, though at least two sites were reported in The Triangle. There were no physical remains of the Ena, but a few surviving images and the dimensions of their ruined architecture indicated that they possessed what could be considered a blocky or clumsy body structure, by humanoid standards. Their nation was thought to be large and expansionist.

Their rise began the Emergent Era, while their disappearance began what was called the First Interregnum. (FASA RPG - The Orions module: Book of Common Knowledge)

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