The Mehbis Cluster was an open cluster of 38 stars that existed approximately 400 million BCE. The Mehbis Cluster contained 18 habitable planets. The dominant higher lifeform was a species of "Singing Trees" which were Hlutr-descended and had strong telepathic/empathic abilites. Through the mediation of the Singing Trees and the co-operation of local Hlutr, the entire Mehbis Cluster became one single ecological unit.
In time, a form of co-operative micro-organisms developed intelligence and managed to build up a sophisticated nano-scale technology, including interstellar travel. However, technology fed upon itself and the micro-organisms severely overpopulated the entire cluster. The ecological crash, when it came, was quick and devastating; in the end, both the micro-organisms and the Singing Trees were driven to extinction, and the Cluster's biodiversity was decimated.
Over the course of Galactic revolutions, the stars of the Mehbis Cluster drifted apart. Today, there is no unity among the remaining planets, and only a few (mostly microscopic) ruins remain as evidence of the glories that once existed there.
The Children of Lavarren were a Scattered Worlds race which flourished c. 500 million BCE. Lavarren was their homeworld.
The Children of Lavarren were descended ( via Pylistroph Seed Vessel) from the Evellan. Physically, they were tall and willowy, and had rudimentary wings that allowed them to glide in Lavarren's low gravity. They were long-lived, with a juvenile phase that lasted about six to eight Human centuries, and and adulthood that could easily span ten thousand years.
Over the course of about six hundred millennia, using simple lightsail technology and a primitive form of ultrawave, the Children of Lavarren forged a union of roughly three hundred worlds across a distance of about two hundred parsecs along one Galactic Arm. They sent our exploration parties across the Galaxy.
When a long-distance exploration team from Lavarren penetrated the Gathered Worlds, the Children of Lavarren attracted the attention of Garadhros. Slowly, carefully, agents of Garadhros moved through the Lavarren union sowing the seeds of dissent and war. The Children of Lavarren, who until now had been peaceful, discovered war -- and soon the union was torn by strife.
At last, researchers on Lavarren itself developed a doomsday device: a method of triggering the simultaneous supernovae of sixteen key stars throughout the union, thereby flooding space with hard radiation that would render the entire arm of the Galaxy uninhabitable.
The crisis raised enormous moral conflicts among the ranks of the newly-formed Galactic Riders. The Riders finally came to realize that the only way to prevent the Children of Lavarren from self-destruction was to take away their freedom, and so they focussed their attention on evacuating innocent sapients, and (in the last throes) saving and preserving works of art.
In the end, of course, the doomsday device was used. And so the Children on Lavarren passed away in suicide, while the Scattered Worlds, Hlutr and Daamin and Riders alike, watched in sorrow and horror.
The Folk of a Thousand Suns were a Scattered Worlds race which flourished c. 220 million BCE in a globular cluster far below the Galactic Plane. At their peak, the Folk commanded an empire that nearly encompassed the entire globular cluster, and lasted for nearly 10 million years.
The Folk were space-dwellers, evolved in the chaotic cometary shells of stars near the center of the globular cluster. There, where stars were at an average separation of a third of a parsec or less, the intensity of radiation drove evolution at enormous speed.
Individually, the Folk were large, hundreds of kilometers across. They were very long-lived, and had means of propulsion that allowed them to move from star to star. By choosing the level of cosmic ray flux in which they reproduced, the Folk had some control over how much their offspring would diverge from the parent's form.
The Sardinian League formed in 5973 CE, and had a very uncertain course throgh the millennia. The League, never a formal government, was more of an economic and cultural alliance. The four main member states -- Borshall, New Sardinia, Terexta, and Sedante -- freely withdrew and rejoined many times as shifting political realities forced realignments of power in the sector.
The Sardinian League came to a formal end when it became one of the founding members of the Second Empire in 20,724 HE.