The year 522 before the Battle of Yavin (BBY) was a period of time in the centuries following the Ruusan Reformations of 1,000 BBY. After the Hol Insurrection that nearly destroyed the Order of the Sith Lords through internal issues, the Sith formed an alliance with the Guardians of Lettow, a group of Dark Jedi headquartered on Lehon. The Lettow swore their allegiance to the Sith and become the servants, a relationship that lasted for at least five hundred years.