In late 2373, the B'Moth was attacked by the Jem'Hadar while on patrol at the Cardassian border. Disabled and on emergency power only, the cruiser drifted across the border into Cardassian space. The IKS Rotarran found the B'Moth three days later, and rescued thirty-five survivors. (DS9: "Soldiers of the Empire")
|IKS Amar • IKS B'Moth • K'Nera's battle cruiser • Kang's battle cruiser • Kronos One • IKS T'Ong • Unnamed|
According to the script for this episode, the pronunciation for B'Moth was "buh-MOTH". 
While the Rotarran rescued the surviving crew of the B'Moth, the fate of the ship itself was left unclear on screen, however this ambiguity was addressed in the script. According to the script, upon the first viewing of the ship onscreen, it "reveals the badly damaged wreckage of a Klingon Battle Cruiser. One whole side of the ship has been blown away and it's clearly beyond repair."