Second Great and Bountiful Human Empire

The Second Great and Bountiful Human Empire was a political entity with influence in three galaxies. By the 42nd century, it had spread from an overcrowded Earth throughout the galaxy known as Mutter's Spiral and two others, including the Andromeda Galaxy (one can reasonably infer the other is the Triangulum Galaxy, the next closest galaxy after Andromeda). These three galaxies were collectively referred to as the Tri-Galactic. The currency of the Empire was the credit. The Empire commonly used Ood as slaves. (TV: Planet of the Ood)

The Empire as a whole apparently had detailed knowledge of over 67.000 sentient species and sub-species and had familiarity with at least 42.000 languages, 47.000 types of weapons, 56.000 vehicles and 81.032 hand-to-hand physical combat methods.

One of the farthest reaches of the Empire was Agelaos. (PROSE: The Story of Martha: The Weeping)

The Earth was far less polluted in the empire's days than in the 20th Century. (TV: The Daleks' Master Plan)