Byluir was a Moff of the Galactic Republic and later Grand Moff of the Galactic Empire. During the Clone Wars, Byluir was promoted to the rank of Moff and placed in command of the 13th Sector Army, also known as "Iron Lance Command". The 13th Sector Army was charged with protecting the Trans-Nebular Oversector, an area that Byluir effectively had complete power over. After the rise of the Galactic Empire in 19 BBY, Byluir retained command of both the Sector Army and sector itself.