In the 21st century, a Trevin ship crashed on planet Draanis IV. The survivors were able to create a viable community which continued for two hundred years. Then, in the 23rd century, Draanis IV was annexed by Dernovin, and the Trevin enslaved.
In the 24th century, a group calling themselves the Trevin Resistance Movement captured the USS Voyager and used it to launch an attack against the Dernovinians. In retaliation, Dernovin executed the entire population of Draanis IV. (VOY short story: "Fiction")