History
...Then the sathar appeared. No one knows where they came from or why. They attacked and destroyed lonely systems on the edges of explored space, moving slowly inward. Survivors described the sathar as wormlike creatures 3 to 4 meters long. That was all that was known about them, because they would rather kill themselves then be captured. As the danger increased, the humans, dralasites, vrusk and yazirians formed the United Planetary Federation (UPF) to defend their worlds. The mysterious sathar were forced back, but before long they returned  in a more sinister form.

The sathar had learned that they could not beat the UPF in battle. Instead, they began hiring yazirian, dralasite, vrusk, and yazirian agents to sabotage interstellar trade and interfere with local governments.