Flag Territory In the mirror universe, the Romulan Republic (sometimes known as the Romulan Empire) was an interstellar state government composed of member planets, colonies, and other outposts. The Romulan Republic was quite similar to the counterpart universe's Romulan Star Empire, in that it consisted mostly of Romulan citizens; with similar Romulan starships as the Romulan Star Navy; in about the same area of space within the galaxy's Alpha and Beta Quadrants. (TOS video game: Shattered Universe)