Romulan Star Empire

The Romulan Star Empire (or simply the Romulan Empire) was a major interstellar state encompassing the Romulan people and their subject worlds and species. The Empire was known for its xenophobic character and policies of extreme secrecy, subterfuge, and territorial expansionism. By the late 23rd century, the Empire counted among the great powers in its region of the Milky Way Galaxy.    It has frequently clashed and allied with its neighbors and both the Klingons and Federation have been, in recent history, allies and enemies.