Romulans

The Romulan Star Empire has expanded largely through the conquest of its neighbours. Fallen worlds are ruled with an iron fist, with local governments under absolute control of the Romulan overseers. And while the Romulans possess strong emotions, they seem to be utterly devoid of any empathy for those they subjugate. But for all these excesses, Romulans are still considered to be a highly honourable people. First encountered by Starfleet in a battle that took place two centuries ago, theRomulans have continued to be a persistent thorn in the side of the Federation. After a brief and bitter war with Earth forces in 2160, the Romulan Neutral Zone was established as a one-light-year-wide buffer zone separating Federation and Romulan territory. Starships from either side crossing over the zone, or even venturing into it, risk causing an official act of war.