Klingon ship lost near the Cardassian border in 2373, whose rescue by Martok's Rotarran restored the morale of a beaten crew.
The B'Moth was a Klingon warship that disappeared near the Cardassian border in 2373, during the early fighting between the Klingon Empire and the Dominion. The Klingon High Council gave General Martok command of the Bird-of-Prey Rotarran and sent him to find it.
In Soldiers of the Empire, the Rotarran located the disabled B'Moth just inside Cardassian territory. Martok at first refused to cross the border, fearing a Jem'Hadar trap, until a challenge from Worf restored his nerve. The revived crew then defeated a Jem'Hadar ship and came to the aid of the stricken vessel and its survivors.