Star Trek Expanded Universe

The Jem'Hadar battleship was a type of Dominion warship that was involved in the Dominion War.

It was one of the largest ships involved in the conflict at twice the size of the Federation's Galaxy-class starship. For months the existence of this ship was just rumour, until the USS Valiant confirmed its existence in late 2374. In possibly its first action of the war the battleship easily accounted for the Valiant, leaving only three survivors. (DS9: "Valiant")

Several Jem'Hadar battleships were constructed at the Val'toka II shipyards. (Star Trek: Swiftfire: "A Dreadful Operation")

Several of these vessels were present during the final battle of the conflict, the Battle of Cardassia. (DS9: "What You Leave Behind")

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