Hidden Chain Ships, which were capital ships, served the Mandalorians belonging to the Hidden Chain during the time of the Third Galactic War. It is known that a minimum of four of these ships were positioned on Ruhnuk throughout the Mandalorian civil war, and a pair of them engaged in combat against Mandalore the Avenger's faction's forces in the Showdown on Ruhnuk. Subsequently, a Hidden Chain Ship was deployed for the purpose of moving the Holocron Machine, which had been created by Heta Kol, the leader of the Hidden Chain, with the intent to produce a Force-sensitive army. Ultimately, the ship met its end when the Eternal Alliance executed a boarding action on the vessel to obliterate the machine and retrieve Darth Nul's holocron.