The First Great Horror

Disaster / Destruction

The armies and navies of the Darklings invade and infest the galaxy seeking to overrun the Three Great Races and conquer or obliterate all life

The Darkness (a.k.a. The Intruders, The Madness) had spread it's "madness" to enough inhabited worlds that a vast throng of armies and fleets of ships gathered together and attacked the remainder of the uninfected galaxy. The Ancients, along with the Ezsh'der the Doryu and the Fourth Race, combine to defeat the Darkness by wiping out every last Darkling. As the last infected Darkling died, there was no more "madness" left to spread to other life and create more Darklings; this forced the Darkness to wait a long time to try to reestablish a foothold in this dimension. It was unclear how they are able to project the "madness" into this dimension of space or why it took them so long before they are able to do so again.