Romulan History
The Romulans began as a revolutionary group of Vulcans who were referenced as "those who march beneath the Raptor's wings" and refused to accept the Vulcan philosopher Surak's teachings of complete suppression of emotions. Around 400 AD, the dissident group split off from Vulcan society and began the long journey to the planet Romulus. At some point, whether before or after reaching Romulus is unclear, dissidents developed among the Romulans themselves, and a faction of Romulans established a civilization later known as the Debrune. in the 22nd century they named it Romulan Star Empire.