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'''{{PAGENAME}}''' is an [[Imperium]] [[Mining World]] that lies near [[Terra]] in the [[Sol System]].{{Fn|1}}
Somewhere Some time after the [[Great Rift]] appearingappeared, preparations for an uprising by the a [[Genestealer Cult]] were discovered on the planet's [[Decima-Caldus]] orbital platform. The A combined Talon of [[Custodians]] and [[Silent Sisters]] stroke fast and drove the punishing blade through the cult - right to the [[Patriarch]], killing it outright.{{Fn|5}} ==See also==*[[Planets (List)]]
[[Category:Terra]]
[[Category:The Horus Heresy]]
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{{Planets
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'''{{PAGENAME}}''' is an [[Imperial]] [[Mining World]] that lies near [[Terra]] in the [[Sol System]].{{Fn|1}}
==History==
During the [[Dark Age of Technology]] Mercury's city of '''Cytheron''' used force field generators to hold back the rays of Sol itself. This technology was later utilized by the [[Dark Angels]] in the form of the [[Cytheron Pattern Aegis]].{{Fn|4}}
During the [[Horus Heresy]], shoal facilities operated in Mercury's orbit despite its conditions. [[Alpha Legion]] infiltrators also worked with anti-Imperial scavenger clans in the area during the [[Solar War]].{{Fn|2}} Shortly before the [[Siege of Terra]] the the [[Sisters of Silence]] purged [[Psyker]]s from Mercury in a bloody pogrom.{{Fn|3}}
==Sources==
*{{Endn|1}}: [[Codex: Adeptus Custodes (8th Edition)]], pg. 29 — ''Sol System''*{{Endn|2}}: [[Praetorian of Dorn (Novel)]] — , Part 3, Chapter 1*{{Endn|3}}: [[The Buried Dagger (Novel)]] - , Chapter 2*{{Endn|4}}: [[The Horus Heresy Book Nine- Crusade]] , pg.165*{{Endn|5}}: [[Codex: Adeptus Custodes (10th Edition)]], pg. 46 — Showcase, ''1'', pg. 46
[[Category:The Horus Heresy]]
[[Category:Mining Worlds]]
[[Category:Segmentum Solar]]
