The Lusitanian Expanse





The Lusitanian Expanse is a small tithe powerful system under the control of the Imperium of Man located in the northeastern fringe of Imperial space in the Centaurus Arm of the Milky Way Galaxy.

At approximately 90,000 light years from Holy Terra, Lusitania’s location makes it the furthest human controlled sector in the Imperium and the most isolated from its bureaucracy. Its isolation is a result of both the waning power of the Astronomican, and thus the Emperor’s strength, and the region’s physical distance from Terra.

From Lusitania the Astronomican is at best obscured and at worst hidden from the psychic sight of ship navigators making warp travel a dangerous and long endeavour from both within and without the sector.

Presently, the Lusitanian Expanse is divided into five sectors of power. Each is under the rule of a praetor, who in turn owes allegiance to the caesar, who rules the expanse on behalf of the Imperium. Each sector is further divided into systems, which are under the rule of lord marshals and with the planetary governors below them.

These five sectors are:

⚜There be monsters here⚜


Since its founding, the Lusitanian Expanse has been seen as an untamed and damned sector by the Imperial citizens living there—a realm bathed in blood and born in crusade, and with little of worth to be had.

Aged stars and dead words populate the Centaurus Arm, and for every planet capable of life here there are dozens more rife with the decayed and withered husks of aeons old empires: human and alien.

So many civilizations brushed aside with complete indifference.

It is a sector unamenable to life, yet the Imperium survives here—it must—because across the sector’s worlds are the tell tale signs of something anathema to all the races of the galaxy. A disturbing otherness, an outside context without malice or care . . .


By Imperial standards, Lusitania is a young sector new to imperial conquest and settlement. While most of the Imperium can claim a history reaching to a time when the Emperor of Mankind still walked the galaxy, the Lusitanian Sector has only been under the Imperium of Man’s control for a few millennia.

Ancient records from the Great Crusade indicate the area was partially mapped by the Ultramarines Chapter of Space Marines before the Horus Heresy tore the galaxy apart in civil war.

Field reports from the expeditionary fleet’s initial surveys reported a slew of star systems with the remnants of advanced human and alien civilizations. they also discovered a number of surviving low-tech feudal societies eeking out an existence here.

It was during this initial sector survey that the sectors hidden nature was first hinted. The fleet’s tech adepts recorded a strange signal from the void inconsistent with normal stellar background noise. Unfortunately, the onset of war prevented further exploration of the sector as the Imperial Crusading Force withdrew to Ultramar, at the behest of Primarch Roboute Guilliman, to prepare for contingency operations elsewhere.

The Lusitanian Expanse

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