Blades of Damocles: Space Marine Battles: Warhammer 40,000 (Unabridged‪)‬

It is the 41st millennium, and an upstart alien empire has emerged on the Eastern Fringe. After a few skirmishes to retake human worlds from these blue-skinned invaders, the time has come to strike against the so-called Tau Empire.

At the forefront of the Damocles Crusade stand the Ultramarines, commanded by Captain Atheus, the Chapter's Lord Executioner. With his loyal sergeants Numitor and Sicarius by his side, Atheus vows to exterminate the aliens...but the cunning xenos commanders, Farsight and Shadowsun, have other plans.