The Hidden Hand
Like the other orders of the Imperial Inquisition, the Ordo Xenos has its own Chamber Militant — the Deathwatch Space Marines. Across the galaxy there are alien civilisations that threaten mankind, from the monstrous Tyranids to the spectral Necron and their C’tan masters. It is the sacred task of the Deathwatch to stand sentry against these xenos races. They are ready to act should such ancient evils ever rise against mankind once more. The Space Marines of the Deathwatch form the first, and often only, line of defense against these inhuman horrors.