The Trivas system is a star system in the Cardassian Union and the former location of space station Empok Nor.
The system was not strategically important to the Dominion in 2373 and there had been no activity there by the latter months of that year. (DS9 episode: "Empok Nor")
The USS Enterprise-E discovered the Damask Plain adrift in the system in early 2375 and towed it to Deep Space 9. (ST - Tales of the Dominion War short story: "Mirror Eyes")
In mid-2376, the USS Musgrave responded to an emergency in the Trivas system. (TNG - The Brave and the Bold, Book Two novella: The Final Artifact)