After negotiating with the Female Changeling to join the Dominion, the Breen brought many warships to the Cardassian Union. This included Gor's Tykk, which captured Worf and Ezri Dax in the Goralis system. After being held aboard for several days, they were brought aboard a Jem'Hadar fighter and handed over to Weyoun. (DS9 episodes: "Penumbra", "'Til Death Do Us Part", "Strange Bedfellows") Several weeks later, after Corat Damar was lured to Cardassia by Gul Revok, a Breen warship helped the Dominion to destroy his fighter. (DS9 episode: "The Dogs of War")