Since before the Battle of Yavin, avid geneticists had been studying the genetic code of the Sith species, attempting to acquire a full sample of the Pureblooded genetic code possessed by the likes of Naga Sadow, Ludo Kressh, Marka Ragnos, and others. For years, fragments of their code from long-dead Sith corpses were all that they had to go on. Though examination of the Lost Tribe of Sith on Kesh revealed Red Sith code sections previously damaged or unknown to geneticists, the majority of the code was missing.