Lord Guerreiro was the Dark Lord of the Decreton Empire from 18 BBY up until his death in 40 ABY. He was killed by Jasca Ducato after he attempted to turn him to the dark side of the Force. Ironically, he succeeded, but at the cost of his own life. The Sith Master of an unnamed Sith apprentice and Darth Wyyrlok, Guerreiro ruled the empire with an iron fist, favoring certain Sith Lord's over others.