The Romulans were a humanoid species from the planet Romulus. They were an off-shoot of the Vulcans, their ancestors having left Vulcan after rejecting the teachings of Surak. The Romulan state was known as the Romulan Star Empire, a major power in their region of the galaxy.
Entry into the FederationEdit
In the mid to late 25th century, the Romulan Star Empire and the Federation was at the height of one of their tensest time periods. Captain Courtney Covaks defied orders and crossed the Romulan Neutral Zone into Romulan territory, making it to Romulus where she made the plea before the Romulan Senate and the Praetor to call for peace between the Federation and Romulan Star Empire. Much to the surprise of the Federation council, the Romulans agreed to open talks, resulting in a lasting peace between the two organizations, and the eventual entry of the Romulans into the Federation. (Star Trek: Freedom)