Battle of Khitomer (DMU)

The Battle of Khitomer was a conflict over the planet Khitomer in the dark mirror universe that occured during the long-term Terran-Klingon War which the Klingons were trying to send their sneak attack fleet to Earth until they were taken out by surprised, when 19 Terran starships managed to destroy their attack fleet as well as the colony on the planet's surface and over 3,500 Klingons were killed.