The Sith-Arzetian Empire was Theocratic Authoritarian empire that existed from 230 ABY to 350 ABY. It was formed from the New Sith Order. Its first Emperor was Darth Ominarik, a surviving member of the New Sith Order. Its last Emperor was the youngest emperor in the Galaxies history, a 17 year-old boy called Darth Nathias. The empire fell upon the disbandment of the Imperial Alliance after the Republic Powers' victory in Galactic War I.