The Koprulu Sector is home to many different races and planets. In this sector, The planets seem very close in this Sector. The races also seem to inhabit almost every planet in the Sector. Plazatrax's KRONOS units have been dispatched to take control of the entire sector.
The Protoss are a mythical race that have powerful Psionic capabilities.
The Zerg are a race of Rapidly evolving Creatures. They can corrupt other races and become hybrids of that race and zerg.
Terrans are a group of humans that started a Colony in the Koprulu Sector. They are seemingly smarter than normal Humans.