Wrath defenses

The Fortress World of Spite, part of the impenetrable Iron
Collar of fortifi ed worlds guarding the Well of Night, was built
up still further and sired an offspring in the form of Wrath, which
within the span of a decade became as mighty and impregnable
a bastion world as its progenitor.
…
Wrath is a grey, cold, and windswept world, lacking
large continental masses but featuring countless thousands
of islands grouped together into a continuous chain that
encircles the entire planet about its equator. The thousand or
so largest islands are each host to a rearing edifi ce belonging
to the many agencies of the Imperium’s control over the
conquered worlds of the Canis Salient. Because the region
is still a war zone and far from fully pacifi ed, even the most
innocuous of administrative bodies is headquartered within a
mighty fortress armed with fearsomely powerful ground-toorbit
defence batteries. Each of these bastions is covered with
spy-lenses and antennae, part of the so-called Eyes of Wrath.
No worker who toils within or around Wrath’s bastions ever
strays outside of the gaze of the dark spy-cams.
Unknown to the ruling military council of Wrath, the
world is host to a number of Inquisitorial holdings, most
of them masquerading as minor Adeptus Administratum
sub-bureaus. Via these covert nodes, the Inquisition, and by
extension the Deathwatch, maintain a close vigil over the
governing powers of the Canis Salient, as much concerned
with uncovering treachery within the Imperium’s own ranks
as it is with uncovering the activities of its many enemies.

 Deathwatch: The Achilus Assault