The regiment's nickname originally came about as a result of the name of their commanding officer, Colonel-Commissar Ibram Gaunt, and the disenfranchised status of the original Tanith soldiers after their homeworld was destroyed. The regiment has been heavily engaged in the combat to retake the Sabbat Worlds from the Forces of Chaos during the Sabbat Worlds Crusade. The Astra Militarum regiment known as the Tanith First-and-Only, officially called the Tanith 1st Regiment but better known as 'Gaunt's Ghosts', was raised from the Frontier World of Tanith in the Sabbat Worlds Sector.
