The ProtoEmpire

The ProtoEmpire was the first galaxy-spanning polity in the Local Group.

Origin
The beginnings of the PE are shrouded in mystery. Some claim it was founded by refugees from the far future, fleeing into the past to escape annihilation at the hands of some unknown foe, while others claim the founders were lost time travellers rebounding from the Early and/or Late Boundaries. What is known, however, is that the PE was founded by the descendants of time travellers who settled one particular planet in the MMC, a planet later known as Magnus.

Breed Composition
From the beginning, the PE was dominated by Mainbreed Humans (MBHs).

Fall
After half a millennium of steady expansion, the ProtoEmpire fell in literally one night. From every ProtoImperial planet throughout the Milky Way system, the ruling MBHs took to their space-ships with all of their technology and vanished, leaving their slave and pet breeds to fend for themselves. No trace of them has ever been found.