Although all three powers laid claim to the area, it was the Terran Empire which had done the most to substantiate its claim through establishing several colonies in the region, as well as the construction of Vanguard Station or Starbase 47. In fact, Vanguard Station was the center for the empire's activity in the Taurus Reach. Under its commanding officer, Commodore Diego Reyes, the personnel of Vanguard undertook extensive archaeological digs of planets in the Reach all in an effort to uncover lost technology once used by the Shedai, the former dominant species in the region. Going so far as to capture a female Shedai of unimaginable power, Reyes believed he could have the region secede from the Terran Empire and turn it into his own little fiefdom.
One hundred years later, in 2377, the Tholian Assembly, the Gorn Hegemony and the Breen Confederacy met at the site of the former Imperial Starbase 47 and agreed to form the Taurus Pact, a coalition of all three polities. (ST - Mirror Universe novel: Rise Like Lions)
- None officially, but a zone of Terran expansion prior to 2277, then the Tholians. Since 2377, the Tholians were members of the Taurus Pact.