Baraban is a verdant Xenos World under the control of the T'au Empire's Velk'Han Sept in the Jericho Reach. Its ownership is contested by the Astra Militarum forces of the Achilus Crusade, yet both sides suffer from inexplicable hallucinations the longer they remain planet-side.
The war on Baraban is a conventional one, with battle lines of trenches and fortifications, attacks and counterattacks, as each side tries to push the other back.
Time and again the Astra Militarum launch armoured spearheads that shatter the xenos lines and it seems that surely a crushing victory will at last be won. Then the ghosts of Baraban make themselves known, and the Imperial forces fall apart in terror and madness.
A whole Human army can suddenly be assailed by bizarre visions and sensations, and must fight to save themselves from crazed comrades as well as the xenos.
The source of Baraban's ghosts is unknown, but everyone who has been there and survived has his own explanation. They appear to each guardsman differently: some as voices in the mind, others as visions of loved ones long dead or resident on distant worlds.
Many Astra Militarum commanders believe the T'au have a hand in Baraban's ghosts, but others believe the Kroot and the Vespid have their own difficulties on the planet.
The Kroot, in particular, evolve into strange and apparently useless strains very easily, with dead-end strains like mindless cattle or uncontrollable predators resulting from the planet's cruel influence.
- Deathwatch: Core Rulebook (RPG), pg. 355