In late 2289 a peace conference between the Federation and the Klingon Empire was scheduled to be held at Korvat. Under orders from the Klingon High Council, Koloth brought his ship to Korvat. The Gal'tagh was accompanied by IKS Klothos under the command of Captain Kor, the IKS QaD under the command of Captain Kang, and Ambassador Kamarag's ship IKS Mev'Luh. The four Klingon ships were met in orbit by the Starfleet vessel USS Excelsior.
Unfortunately shortly after the conference began it was bombed by Qagh, who was also known as The Albino. This resorted in the death of a number of the participants at the conference, and injuries to many others also present at the conference. Gal'tagh and the other Klingon ships all sustained damage when attacked by Qagh, with the Mev'Luh being destroyed in Qagh's attack.
Once the attack was over, a contingent of Excelsior engineers assisted in repairs to the Klinton ships. Once the repairs were completed, the Gal'tagh and the other Klingon ships set out to find the Albino and bring him to justice. The Klingons tracked the Albino to Mempa II, where Qagh had ransacked a Mempan labatory.
While in orbit of Mempa II, the Gal'tagh was attacked and destroyed by Qagh's ship. Koloth was the only survivor, due to the fact that he was onboard the Klothos when the attack occured. (TOS novel: Excelsior: Forged in Fire)