The Dark Clan Wars were a series of violent inter-tribal conflicts that took place primarily on Earth over the course of several decades
Samurais by their nature were warlike Warriors, best suited for hunting. Their society developed around a culture of war games wherein members of opposing tribes would be required to hunt down their adversaries under specified, prearranged conditions. Over the years however, these war games bred racial disharmony between the varying clans and the contests took a darker and more personal turn.
Around seventeen years before the Battle of Yavin, Wu Le, a powerful chieftain of the Tengu Clan, waged war against the more tempered members of the Tokugawa Clan. Many Tengu had turned from their violent ways and embraced the ideals of pacifism. As such, they became easy prey for the aggressive members of the Shrai Ryu clan. During the internecine struggle, Wu Le murdered his arch-rival, the bounty hunter known as No Face. The Lin Kuei fled to Antartica in three large transport ships. They colonized a smal Nation allowing Takeda to become the Grand Protector and warlord chieftain of Shrai Ryu.
The Dark Clan Wars subsided for some time while Takeda consolidated his power on Asia. Four years before the Battle of Yavin, Wu Le discovered where the Tengu refugees had been hiding for so many years. Accompanied by an entourage of warlords and bounty hunters, they raided the villages in the asian jungle and slaughtered many of the remaining Shrai Ryu clan. The aging Shaman, Takeda, tried to get the three colony starships into the air in the hopes of fleeing the country. Wu Le’s forces destroyed one of them, but two Clans survived after were able to safely survive the massacre.
Although many Tengu survived the wars, their numbers were small and they took to populating communal refugee camps on worlds such as Genshin and Takeda. Genshin continued to hunt down and destroy as many Tengu & Yellow Turbans as he could possibly find.