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. 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. (DW: Planet of the Ood)

The Empire as a whole apparently had detailed knowledge of over sixty-seven thousand sentient species and sub-species and had familiarity with at least forty-two thousand languages, forty-seven thousand types of weapons, fifty-six thousand vehicles and eighty-one thousand thirty-two hand-to-hand physical combat methods.

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

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