Before the Common Era (Columbia)
From Trekipedia
c.5 Billion BCE
- Chapter 11 (TNG #47: "The Q Continuum, Book One: Q-Space")
- Vulcan: One (TOS: "Spock's World")
- "Reciprocity" (TNG: "Strange New Worlds II"
c.2.5 Billion BCE
- Chapter 13 (TNG #47: "The Q Continuum, Book One: Q-Space")
c.1 Billion BCE
- Chapter 2 (TNG #48: "The Q Continuum, Book Two: Q-Zone")
444,800,000 BCE
- Chapters 12, 17, 19, 23 (VOY) #2: "The Escape"
64,018,143 BCE
- Chapters 23-38 (TOS #75: "First Frontier")
500,000 BCE
- Vulcan: Two (TOS: "Spock's World")
307,600 BCE
- Chapters 4-7, 23 (VOY) #2: "The Escape"
27,600 BCE
- "Horn and Ivory," chapters 1-9 (DS9: "Gateways: What Lay Beyond")
10,000 BCE
- Vulcan: Three (TOS: "Spock's World")
7954 BCE
4527 BCE
- An Erigol city-ship is accidentally transported back in time from 2168 with several survivors of the Columbia NX-02 crew. One of the Erigol survivors, desperately trying to stave off death, forces a bonding with the Humans, resulting in the formation of the Borg Collective. (ENT/TNG/DS9/VOY/TTN: "Destiny, Book Three: Lost Souls")
3000 BCE
- Vulcan: Four (TOS: "Spock's World")
c.2705 BCE
- Ancient Past (TOS 78: "All Our Yesterdays")
2703 BCE
- Chapters 5-6 (TOS #11: "Yesterday's Son")
2683 BCE
- Prologue, Chapters 5-10, 14-15 (TOS #39: "Time for Yesterday")
235 BCE
- Chapter 11 (TOS #21: "Uhura's Song")
30 BCE
- Vulcan: Five (TOS: "Spock's World")
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