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The '''Koronus Expanse''', also known as the '''Koronus Sector'''{{Fn|4}}, is the name given by Imperial authorities to a dangerous unexplored region of the [[Halo Stars]] beyond the [[Calixis Sector]].{{Fn|11a}} 

As is true of the Calixis Sector itself, the Expanse was untouched by the [[Emperor of Mankind|God-Emperor]]'s [[Great Crusade|Crusade]] many millennia ago and so it is a realm of fearsome [[xenos]], treasures beyond imagining, heathen worlds of men, and the echoes of the ancient doom.{{Fn|11a}}

===Rogue Traders and their involvement===For centuries, Rogue Traders have braved great evils and the treacherous [[warp]] to venture into the Koronus Expanse, but their efforts have barely begun to uncover its secrets. Footholds have been built close to the few semi-stable warp routes into the area.{{Fn|1a}} Here, resources-rich worlds are exploited, xenos ruins, trade envoys meet with heathen lords, and colonies are attempted upon sheltered worlds. This effort has been enough to shower wealth and fame upon the fortunate and make corpses of the rest. The gateway to the Expanse is littered with broken vessels and tales of the vanished.{{Fn|1a}} ===Current stateState===The Koronus Expanse in the [[M41|41st Millennium]] is a scattered, partly explored region containing a few young colonies and vast natural wealth still barely explored.{{Fn|11a}}

Drawn by the flow of wealth, [[pirate]]s and servants of [[Chaos Gods|Dark Gods]] have also slipped into the Expanse, eager to cast destruction upon the works of the God-Emperor's faithful, living by what they wrest from dead hands, while the Expanse itself holds many secrets and native inhabitants no less dangerous. Beyond these human conflicts lie truly dark and dangerous voids, rife with rumoured terrors, undiscovered stars, and worlds of man who have never known the God-Emperor. There are no defined [[warp-route]]s, no safe ways through the swirling empyrean. These regions hold the fearsome [[Ork]], the treacherous Aeldari, and strange ruins that lie beneath the light of dying stars.{{Fn|11a}}

==Galactic PositionLandscape==

==Areas/=Warp Routes===The warp space of the Koronus Expanse is treacherous and unknown in the main, and partially explored regions of the Expanse are islands of [[Imperial]] activity amidst a vastness of danger and mystery. Navigating is a far cry from traversing the established warp routes of the Calixis Sector.{{Fn|1a}} Most of the Koronus Expanse is known to the [[Imperium]] only through legend, revelation, and hearsay. The Rogue Trader who ventures into this unknown risks his very soul upon the talent of his [[Navigator]], and on quality of what little information he has gleaned from those gone before.{{Fn|1a}} ===Unexplored Regions===Beyond the partly explored regions of the Koronus Expanse, past deeps beset by pirates and dread xenos, lie many worlds and strange phenomena which exists as the stuff of dark legend. Some of these uncharted stars were visited by a single Rogue Trader whose tales are doubted and dismissed by rivals as outright lies, while others are known only from dubious and apocryphal sources such as Thulean data-vaults recovered from Dolorium's voids in 741.M41, or the infamous prophetic visions of the Seven Witches of Footfall.{{Fn|1a}} Other fragments of contradictory lore relating to these dark zones are culled from even more untrustworthy sources, such as the muted [[Astropath|Astropathic]] whispers overheard on the warp's twisted eddies, the falsehoods of the deceitful Eldar, or the ancient myths of heathen worlds given over to darkness for millennia uncounted.{{Fn|1a}} Such areas are only labelled only as "Here be monsters" on ancient charts, where only the foolhardy of insane would venture to seek their destiny. ===Known Regions===

*The Koronus Expanse is the primary setting for the ''[[Rogue Trader (RPG series)|Rogue TraderRole-Playing Game]]'' role-playing game.{{Fn|1a}} and [[Warhammer 40,000: Rogue Trader (Video Game)|Rogue Trader Video Game]]{{Fn|7}}

*{{Endn|1}}: [[Rogue Trader Rulebook]], pgs. 335–362**{{Endn|1a}}: pgpgs. 334335–362

**{{Endn|2a6a}}: pg. 6**{{Endn|2b6b}}: pg. 12*{{Endn|7}}: [https://roguetrader.owlcat.games/ Warhammer 40,000: Rogue Trader Website] (Last accessed on September 20 2022)