The Battle of the Hobileth Nebula was an engagement during the Dominion War near the Hobileth Nebula in 2375. (Ship Recognition Manual, Volume 3: Ships of the Klingon Empire)
During the battle the IKS Bacjen open a major hole in the Dominion's lines when it destroyed three Galor-class battle cruisers. The Bacjen was later destroyed by the Jem'Hadar.