The Eldar
The enigmatic Eldar have lived among the stars longer than any of the races currently in contention for control of the galaxy. They are also the fewest in number. It is said that they are a dying race, victims of some cataclysm. They aren't saying, and whatever the truth, they certainly don't appear to be going anywhere. Though small in number, they excel at the art of war, and are exceptionally graceful, fast, and arrogant. They are technologically brilliant, employing anti-gravity tanks, heavy weapon platforms, and tactical versatility to overcome their foes.