Hundreds of thousands of years ago, before the species homo sapiens even walked the earth, there were two space faring civilizations. The Drengin Empire and the Arcean Empire sent out probes across the galaxy. Between the two of them, they invented a city-sized device called a star gate. The star gates allowed a star ship to travel great distances between the two star gates. The Drengin and Arceans each constructed one of these massive devices and were able, for a time, to trade with one another.