The Tarc expanded to settle several systems near their homeworld. The Tarc's technology level is roughly comparable to that of the Empire, though its hyperspace technologies are less developed because the Tarcs do not travel beyond their territory. When they encountered aliens, they immediately sealed their borders to outsiders, afraid alien societies would infect their culture. With the creation of their domain, the Tarc formed a large, highly trained navy to police its borders. This navy, the Ivlacav Gourn,has followed a policy of zero tolerance for intruders. They ferociously attack any who enter. This policy has resulted in recent skirmishes with Imperial scouts trying to cross the borders. The Empire has yet to respond decisively, but when it does, the Tarc are not expected to fare well.

The Tarc rarely venture outside of their realm - it's a capital crime to leave Tarc space without permission. Only a few have left their home, and they are outcasts or criminals. As such, most Tarc outside their home territory are employed by various criminal organizations where they make excellent enforcers, assassins, and bounty hunters. Some are employed as body-guards, where their fierce appearance alone is often enough to change the mind of any would-be attacker.