In the year 2611, a Salsene colony ship landed on the planet LV-314. While investigating a mysterious crash site, one salsene was attacked by a facehugger and impregnated. Within days, 90% of the salsene colony had been killed by the xenomorphs, and over a hundred saliens were born. A few salsenes managed to escape the world, but one had been impregnated by a salien facehugger. Thus the saliens spread to other planets.