Gemini Sector is region of space that lies directly corewards of Sol Sector, directly spinward of Avalon Sector, and directly anti-spinward of Trk'Pahn Sector. Gemini Sector consists of the Clarke, Fariss, Humboldt and Potter Quadrants.
Gemini was first settled by the Terran Confederation in 2639 as an effort by the Confederation military to contain Kilrathi expansion by entrenching along the border of the Kilrathi Empire. During the early entrenching period, the Terran Confederation Exploratory Services (TCES) were first called in to map out available resources, including habitable planets, mineral-rich asteroids and jump tunnels. Within the first five years of exploration two major factors contributed to the opening of Gemini to public enterprise. The first was the rapid entrenchment of military forces far from established supply lines and support services — they needed access to local resources, while the second was the tremendous wealth of resources discovered in Gemini. This was essential in boosting the Confederation’s gross worth.
The Sector was largely uninvolved in the Terran-Kilrathi War due to the exceptionally strong Confederation naval presence in the Clarke Quadrant and the relatively few jump tunnels that connected to Kilrathi territory. During the Nephilim War, however, the Sector was the site of several major battles that resulted in the destruction of Perry Naval Base as well as the Sector's capitol at New Constantinople and a mass exodus of much of Gemini's population. By 2700, the Sector had begun to recover and a new capitol - New New Constantinople - had been established.