Neural Knights were an element of the imperial military during the Age of Steel. Essentially hackers, they digitalized themselves to infiltrate and invade the digital planes of the empire's enemies. Much of their history is shrouded in mystery, but it is speculated that there existed knightly orders and many, if not all, also served as shock troopers and leaders in front line combat.
It is unknown if any knights fought in the War Under One Sun, although the technology they used to do battle was forbidden following the war's end, whilst their orders were also presumably disbanded. During the Age of Gold, very few are aware the knights ever existed.