The Tanith First and Only are best known for their participating in the [[Sabbat Worlds Crusade]]Crusade, which began in 755.M41. During the Crusade, the Ghosts' expertise in covert operations was instrumental in the liberation of a number of worlds. However, rivalries with other, more illustrious regiments (in particular, the [[Jantine Patricians]] and the [[Volpone Bluebloods]]) often put the Ghosts at risk.