The Romulan Empire is a major interstellar state known for secrecy, subterfuge, and territorial expansionism and is counted among the great powers fo the Milky Way Galaxy. Romulans have rejected the emotional control and logic of Vulcan society in favor of controlled deviousness. Romulan technology, such as cloaking devices and mines, is often cited as one fo the reasons why the Romulan Empire is regarded as such a dangerous foe in times of war.
The Dominion was a millennia-old interstellar state in the Gamma Quadrant consisting of the Founders, Vorta and Jem’Hadar joined by the Cardassians, Breen, and other species in the Alpha Quadrant. This highly technologically inclined group was found and ruled by the Founders, a group of Changeling shape-shifters. The desires fo the Founders were carried out by the genetically engineered Vorta acting as commanders and diplomats for the Dominion. The Jem’Hadar, forced into drug-induced servitude with Ketracel-white, acted as the soldiers and workers for the Dominion.