The Goeg Domain was an interstellar state located beyond the Keempo Expanse in the Alpha Quadrant, 100 light-years away from the Federation. The Domain consisted of at least six species and was controlled by the Goeg, who conquered other species to add them to their ranks. The Domain's capital was on Goega, and the military space service was the Domain Defense Corps, which operated a fleet of starvessels. (TOS novel: The Shocks of Adversity)
The Domain Defense Corps (DDC) maintained a fleet of starvessels to ensure obedience of Domain population. There were at least three types of starships, including Class I and Class III starvessels. Although DDC soldiers were drawn from several member species only the Goeg could attain command positions. To aid interspecies communication, most starship operational commands were given as a series of numerical codes.
The Goeg Domain included several planets conquered by the Goeg. Defeated enemies were assimilated into the Domain, including their homeworlds. From the Domain's perspective, the Federation lay beyond the Keempo Expanse, 100 light-years away. (TOS novel: The Shocks of Adversity)