Terminus Systems
From Mass Effect Wiki
Their independence comes at a price; the Terminus is fraught with conflict. War among the various species is common, as governments and dictators constantly rise and fall. The region is a haven for illegal activities, particularly piracy and the slave trade. The prevalence of batarian criminal gangs has led to the batarian language becoming something of a lingua franca in the Terminus. The Terminus Systems have no government, but the Omega station serves as a trade capital, much as Tortuga was the main port of call for pirates in the 17th century Caribbean.
At least once a year, a fleet from the Terminus invades the nearby Attican Traverse. These attacks are typically small raids against poorly-defended colonies. The Council rarely retaliates, as sending patrols into the Terminus Systems could unify the disparate species against their common foe, triggering a long and costly war.
Before the Alliance expanded into the Voyager Cluster, the turians mapped the Terminus Systems in great detail using an interferometric array, with one end in the Attican Beta cluster and the other at the planet Gromar.
