The location of Epsilon Indi on a star chart
Epsilon Indi system was an inhabited star system was located approximately twelve light years from Sol. It's primary was the star Epsilon Indi.
In early history, a band of marauders based on Triacus wreaked chaos on the inhabitants of the Epsilon Indi system. After many centuries of intrusion, the inhabitants of Epsilon Indi were finally able to rise up and destroy the marauders, leading to their corporeal extinction. (TOS: "And the Children Shall Lead")
By the mid-24th century, Humans were living on Epsilon Indi II. (TNG: "Eye of the Beholder", okudagram)
Appendices 
Edit
Background information Edit
According to Star Trek: Star Charts (pp. 45, 66, "United Federation of Planets I") and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), the Draylax (Epsilon Indi) system was located in the Beta Quadrant. The primary was a K-class star. In the 22nd century, this system was a destination on the Earth trade routes. In the late 24th century, it was a Federation system.
Apocrypha Edit
According to the Star Fleet Technical Manual, the Star Empire of Epsilon Indii was one of the founding members of the Federation. The eighth planet of the Epsilon Indi was stated to be Andor, the homeworld of the Andorian race in The Worlds of the Federation.
The Pocket TOS novel Planet of Judgment mentioned a species called the Tarl (β) who hailed from this area.
