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| {{Status|Canon}} | | {{Era|Forerunner|Covenant|HCW|Post}} |
| '''Shield worlds''', also known simply as '''Shields''',{{Ref/Book|Id=mythos|HM|Page=18}} are [[Forerunner]] installations designed as a defensive strategy against the [[Flood]] and an alternative to the [[Halo Array]]. As opposed to sterilizing the whole galaxy at once, shield worlds would act as a more precise and conventional solution, serving as both refuges for local populations and powerful military fortresses from which to carry out strategic campaigns against the Flood. Several varieties of shield worlds were designed over nearly nine thousand years; in some iterations the interior was suspended in [[Slipspace bubble|fractal slipspace]], protecting organisms within from the Halos' destructive pulse.{{Ref/Novel|GoO|Page=364-365}} A prevalent variation of the shield world concept, known as the '''conservation sphere''', was specifically designed in tandem with the [[Conservation Measure]], sheltering various evacuated species from the Halo effect.{{Ref/Book|Id=EVG|EVG|Page=174}} | | A '''shield world''' is a [[Forerunner]] installation designed as a military outpost to monitor and counter potential [[The Flood|Flood]] outbreaks, as well as to serve as a shelter from the activation of the [[Halo Array]].<ref>'''Halo: Ghosts of Onyx''', ''page 364-365''</ref> Scattered across the Forerunner [[ecumene]], the shield worlds outnumber the Halos by a large margin.<ref>'''Halo: Cryptum''', ''page 273''</ref><ref name="EVG">'''[[Halo: The Essential Visual Guide]]''', ''page 174''</ref> The shield worlds were collectively known as "the Shield", while the Halos were collectively known as "the Sword".<ref>'''Halo: Ghosts of Onyx''', ''page 310''</ref> |
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| Scattered across the Forerunner [[ecumene]], the shield worlds outnumber the Halos by a large margin,{{Ref/Reuse|EVG}}{{Ref/Novel|Cry|Page=273}} with over a thousand installations originally planned and at least 673 constructed, assuming their numeric designations were assigned sequentially.<ref name="Have S'moa">[https://www.halowaypoint.com/en-us/news/canon-fodder-have-s-moa ''Halo Waypoint'': ''Canon Fodder: 2-20-15'']</ref>{{Ref/Novel|Id=hbc76|BC|Page=76}} In the final iteration of the Forerunners' defense plan, the shield worlds were collectively known as "Shields"{{Ref/Reuse|mythos}} while the Halos were known as "the Sword".{{Ref/Novel|GoO|Page=310}} | |
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| ==History== | | ==History== |
| Shield worlds were used by the [[Warrior-Servant]]s as military outposts for thousands of years before the [[Forerunner-Flood war]].<ref name="h4guide">[http://www.halowaypoint.com/en-US/halo4guide ''Halo 4 Interactive Guide'']</ref>{{Ref/Game|Id=h4terminals|H4|Detail=''[[Terminal (Halo 4)|Terminals]]''}} The first shield world, the [[Promethean]]s' military operations hub known as [[Requiem]], was constructed long before the [[human-Forerunner wars]] in [[107,445 BCE]].{{Ref/Novel|Id=sil278|Sil|Page=278}}
| | Over a thousand years prior to the [[Forerunner-Flood war|second]] [[Human-Flood War|coming]] of the Flood, the shield worlds were proposed by [[the Didact]] as facilities from which to fight and research the Flood, an alternate solution to [[Master Builder]] [[Faber]]'s plan to construct the Halos. However, the betrayal by the Forerunner {{Class|Contender|artificial intelligence}} [[05-032 Mendicant Bias]] and its defection to the Flood forced the Forerunners to abandon their plans to evacuate into the shield installations, as Mendicant Bias revealed the locations of the shield worlds to the Flood.<ref>'''[[Halo Encyclopedia]]''', ''page 232''</ref> |
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| After the Forerunners learned of the parasite known as the [[Flood]] in the later stages of the war with the humans, the [[Ur-Didact|Didact]] began to champion the construction of more shield worlds as part of his [[star-hopping]] strategy. Many shield worlds were planned to be mobile, able to be deployed directly into infected systems to purge local infestations,{{Ref/Reuse|mythos}} and would be designed as facilities from which to fight and research the Flood, an alternate solution to [[Master Builder]] [[Faber]]'s plan to construct the Halos.{{Ref/Novel|Id=sil47|Sil|Page=47}} Eventually, a compromise between the two rates was reached: the [[Builder]]s would continue building shield worlds while designing the Halos, with both types of installations planned to be used in tandem.{{Ref/Reuse|mythos}} Numerous shield worlds of different configurations were built over thousands of years, but the Builder rate's growing influence eventually led the [[Ecumene Council|Old Council]] to deem the Master Builder's Halo project superior. The Didact, who stubbornly continued to advocate his strategy to the Council, was ultimately ordered to cease his project and was forced into [[Cryptum|exile]].{{Ref/Reuse|sil47}}
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| Though the construction of the shield worlds was abandoned after the Didact's exile, they still found use as shelters for the various species the [[Lifeworker]]s indexed and collected in the [[Conservation Measure]]. Many Forerunners also intended to evacuate to the shield worlds, but the betrayal by the Forerunners' supreme defense AI [[Mendicant Bias]] and its defection to the Flood forced the Forerunners to abandon these plans: Mendicant Bias revealed the locations of the shield worlds to the Flood.{{Ref/Book|Enc09|Page=232}}
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| The [[Covenant]] owe much of their rapid technological advancement to the discovery of a small number of shield worlds early in their history. They stripped these installations of usable technologies,{{Ref/Game|Id=Timeline|HW|Detail=''Timeline''}} though whether they continued to inhabit them is unclear.
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| During the [[Human-Covenant War]], the shield worlds began to be discovered by humanity, starting with [[Trove]] in [[2531]].{{Ref/Reuse|Wars}} The shield world [[Onyx]]'s internal Dyson shell, [[Sarcophagus]], was rediscovered in [[2552]]{{Ref/Novel|GoO}} and [[Requiem]] in [[2557]].{{Ref/Game|H4}} Both Trove and Requiem were ultimately destroyed, but Sarcophagus became home to a joint UNSC-Sangheili research effort and colony.
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| In [[2558]], the shield world [[Bastion]] was uncovered by [[Rion Forge]] and [[343 Guilty Spark]] in the [[Orion complex]].{{Ref/Novel|Id=PoL38|PoL|38}} This shield world was built as an exact replica of the [[Earth]] surface{{Ref/Novel|Id=PoL39|PoL|39}} and it acted as the [[Librarian]]'s secret research laboratory away from the eyes of the [[Ecumene Council]].{{Ref/Reuse|PoL41}} Amongst the work kept there was the Librarian's secret efforts to cause the rebirth of the [[Precursor]] race.{{Ref/Novel|Id=PoL44|PoL|44}} Due to the dangers from the [[Created]], Spark became caretaker of the shield world and moved it to an undisclosed location.{{Ref/Novel|Id=PoL42|PoL|42}}{{Ref/Novel|Id=PoL43|PoL|43}}{{Ref/Novel|Id=PoLEpilogue|PoL|Chapter=Epilogue}}
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| Following the defeat of the Covenant, the surviving [[San'Shyuum]] and [[San'Shyuum flotilla|their flotilla]] planned to retreat to a shield world known as [[Cloister]] for protection. However, it was left unknown if they ever actually succeeded in reaching it.{{Ref/Reuse|DW}}
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| ==Known types== | | ==Known types== |
| ===Initial design===
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| [[Requiem]] was the first shield world to be constructed, its design later serving as the template for the entire concept.{{Ref/Reuse|sil278}} This variant features an entirely artificial, heavily armored outer surface and contains several concentric miniature Dyson shells within its outer shell. Like the exterior, the interior surface of the outer shell is mechanized and features a light source for warmth and illumination. Another sphere, containing a terrestrial surface-oriented similar to a planet, is located below the outer shell. The interior of this shell contains the hollow core of the shield world and a Dyson shell-like inverted surface.
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| Requiem apparently lacked shielding from the Halo effect<ref name="Bulletin924">[https://www.halowaypoint.com/en-us/community/bulletins/the-halo-bulletin-knowledge-drop ''Halo Waypoint'' - The Halo Bulletin: ''9.24.14'']</ref> in spite of being the most fortified shield world in existence.{{Ref/Reuse|h4guide}} Whether this was true of [[the Refuge]], which used a scaled-down version of Requiem's planet-within-shell design, was unclear.
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| ===Conservation sphere=== | | ===Conservation sphere=== |
| [[File:Shieldogram.png|thumb|250px|A holographic diagram of [[Trove]].]] | | [[File:Shieldogram.png|thumb|250px|A holographic diagram of Shield 0459.]] |
| A common iteration of the shield world concept, the conservation sphere consists of an artificial planetary surface encapsulating a miniature [[Dyson sphere]].{{Ref/Reuse|EVG}}{{Ref/Reuse|Timeline}} Beneath the artificial planetary surface span kilometers of machinery, including many access portals which lead to the sphere's interior; these portals remain sealed when not in use. The interior of the installation is hollow and features a vast [[Terraforming|terraformed]] surface and a miniature [[Astroengineering|artificial star]]. At least one such installation, [[Trove]], had an interior diameter of 2,873 kilometers (1,787 miles).{{Ref/Reuse|EVG}}{{Ref/Level|Id=Escape|HW|[[Escape (Halo Wars level)|Escape]]}}<ref>[http://halo.xbox.com/en-us/intel/theuniverse/locations/gallery/shield-world/073e5c8b-63bf-4fdc-a46d-6150a0026201 ''Halo Waypoint'': ''Shield World''] (defunct, backup on [https://web.archive.org/web/20111008060749/http://halo.xbox.com/en-us/intel/theuniverse/locations/gallery/shield-world/073e5c8b-63bf-4fdc-a46d-6150a0026201 Archive.org])</ref>
| | The standard iteration of the shield world concept,<ref name="EVG"/><ref name="Timeline"/> known as the conservation sphere,<ref name="EVG"/> consists of a planetary surface covering a miniature Dyson sphere. Beneath the artificial planetary surface span kilometers of machinery, including many access portals which lead to the sphere's interior, though remain sealed when not in use. The interior of the installation is hollow and features a vast [[Terraforming|terraformed]] surface and a large [[Astroengineering|artificial star]]. At least one such installation, Shield 0459, had an interior diameter of 2,873 kilometers (1,787 miles).<ref name="EVG"/><ref name="Escape">'''Halo Wars''', campaign level ''[[Escape]]''</ref><ref>[http://halo.xbox.com/en-us/intel/theuniverse/locations/gallery/shield-world/073e5c8b-63bf-4fdc-a46d-6150a0026201 '''Halo Waypoint:''' ''Shield World'']</ref> |
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| While these installations provide safety from the firing of the Halo Array, many possess weapons that can be used to defend the installation's inhabitants; some even harbor fleets of [[Forerunner dreadnought|dreadnoughts]].{{Ref/Book|Id=Control|EVG|Page=35}} These defenses can be activated from an installation's [[control room]] or equivalent control center, which sometimes takes the form of an [[Apex Site|airborne platform]]. However, the control center must be activated by a [[human]]: a [[Reclaimer]].{{Ref/Reuse|EVG}}{{Ref/Game|Id=Wars|HW}}
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| Certain planets are home to conservation sphere waystations, stellar [[cartographer]]s housing directions to nearby conservation spheres. [[Relic (location)|One such facility]] was located on the human colony world of [[Harvest]].<ref>[https://forums.halowaypoint.com/yaf_postsm2972799_Catalog-Discussion.aspx#post2972799 ''Halo Waypoint'': ''Catalog Interaction'' (post 2972799)]</ref>
| | While these installations provide safety from the firing of the Halo Array, many possess weapons that can be used to defend the installation's inhabitants, and some even harbor fleets of [[Unidentified Forerunner dreadnought class|dreadnoughts]].<ref name="Control">'''Halo: The Essential Visual Guide''', ''page 35''</ref> These defenses can be activated from an installation's [[control room]] or equivalent control center, which sometimes takes the form of an airborne platform; however, the control center must be activated by a [[human]]: a [[Reclaimer]].<ref>'''Halo Wars'''</ref><ref name="EVG"/> |
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| Conservation spheres can be modeled after existing planets, becoming an exact duplicate of them.{{Ref/Reuse|PoL39}}
| | The [[Covenant Empire|Covenant]] owe much of their rapid technological advancement to the discovery of a small number of these worlds, which they discovered early in their history and stripped of usable technologies. The fate of these worlds, and whether they were abandoned or remained inhabited by the Covenant, is unknown.<ref name="Timeline">'''Halo Wars''', ''Timeline''</ref> |
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| While most conservation spheres had a habitable outer planetary shell, [[Bastion]]'s was a dead glacial world with no active core.{{Ref/Reuse|PoL38}}
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| ===Micro Dyson sphere=== | | ===Micro Dyson sphere=== |
| The main component of this type of shield world is a [[Dyson sphere]] located within a bubble of compressed [[slipstream space]]. The only entrance to the interior is a small portal within the core of an artificial planet built around the core. Access to these shield worlds is possible only upon the imminent activation of the Halo Array.{{Ref/Novel|Id=goo311|GoO|Page=311}} | | The main component of this type of shield world is a [[Dyson sphere]] located within a bubble of compressed [[slipstream space]]. The only entrance to the interior is a small portal within the core of an artificial planet built around the core. Access to these shield worlds is possible only upon the imminent activation of the Halo Array.<ref name="goo311">'''Halo: Ghosts of Onyx''', ''page 311''</ref> |
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| The Dyson sphere within this type of shield world is enormous; [[Sarcophagus]], for example, is two astronomical units (300 million kilometers) in diameter. As with the more common conservation spheres, micro Dyson sphere-type shield worlds feature vast terraformed surfaces and a single artificial star. The inner Dyson sphere resides within a slipspace bubble and is thus accessible only from the [[core room antechamber]] in the heart of the artificial planet formed around the structure. In normal space, the slipspace bubble is radically smaller than the interior, being only a few meters in diameter, hence the moniker "micro Dyson sphere". | | The Dyson sphere within this type of shield world is enormous; the Sharpened Shield, for example, is two astronomical units (300 million kilometers) in diameter. As with the more common conservation spheres, micro Dyson sphere-type shield worlds feature vast terraformed surfaces and a single artificial star. The inner Dyson sphere resides within a slipspace bubble and is thus accessible only from the [[core room antechamber]] in the heart of the artificial planet formed around the structure. In normal space, the slipspace bubble is radically smaller than the interior, being only a few meters in diameter, hence the moniker "micro Dyson sphere". |
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| ==Known shield worlds== | | ==Known shield worlds== |
| ===Shield World 0001=== | | ===The Sharpened Shield=== |
| {{Main|Requiem}} | | {{Main|ONI Research Facility Trevelyan}} |
| Shield World 0001 (commonly known as Requiem) is the oldest shield world as well as the most heavily fortified.{{Ref/Reuse|h4guide}} It was built long before the [[human-Forerunner wars]] and served as a template for the construction of the other shield worlds.{{Ref/Reuse|sil278}} Requiem once served as the nexus of operations for the [[Promethean]] class of [[Warrior-Servant]]s but was sealed off shortly before the end of the [[Forerunner-Flood war]].{{Ref/Reuse|h4guide}} [[John-117]] and [[Cortana]] found themselves on Requiem in [[2557|July 2557]],<ref>''Game Informer'' (''May 2012''), ''page 41''</ref> where they encountered [[Jul 'Mdama]]'s [[Jul 'Mdama's Covenant|Covenant]], the occupying Prometheans, and eventually the crew of {{UNSCShip|Infinity}}. John accidentally released the [[Ur-Didact|Didact]] from his imprisonment in [[Core of Requiem|Requiem's core]]; after helping ''Infinity'' escape the Spartan attempted to stop the Forerunner from acquiring the device known as the [[Composer]]. The Didact escaped in his ship ''[[Mantle's Approach]]'' but the two successfully pursued him.{{Ref/Level|H4|[[Shutdown]]}} Six months later, in [[2558|February 2558]], the UNSC, the Covenant, and the Promethean forces returned to [[Requiem Campaign|fight for control]] of the shield world,{{Ref/SpOps|[[Departure]]}} which ended when Jul 'Mdama put Requiem on a collision course with [[Epoloch system|its star]], destroying both bodies.{{Ref/SpOps|[[Exodus (Spartan Ops)|Exodus]]}} | | The Sharpened Shield,<ref>'''Halo Encyclopedia''', page ''???''</ref> later designated "[[ONI Research Facility Trevelyan]]" by the UNSC,<ref name="glass397">'''Halo: Glasslands''', ''page 397''</ref> is a Dyson sphere formerly housed within a slipspace bubble of compressed dimensionality, having a diameter of only 23 centimeters in normal space.<ref>'''Halo: Glasslands''', ''chapter 10''</ref> The slipspace bubble was located in the center of the artificial planet Onyx before the planet dissolved and the slipspace rift was deactivated.<ref name="glass378">'''Halo: Glasslands''', ''page 378''</ref> The sphere itself is approximately two astronomical units (300 million kilometers) in diameter and weighs approximately 1.37 solar masses. The Dyson sphere's default environmental conditions are suitable for [[Earth]]-based life, but the climate settings could be adjusted for other species' requirements. When Onyx was intact, the only means of access to the Sharpened Shield was a small portal, which was located inside the core room antechamber in the core of the artificial planet.<ref name="goo311"/> |
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| ===Shield World 0006===
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| {{Main|Sarcophagus}}
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| Shield World 006{{Ref/Novel|TTW|Page=120}} (designated "ONI Research Facility Trevelyan" by the UNSC){{Ref/Novel|Id=glass397|Gla|Page=397}} is a Dyson sphere formerly housed within a slipspace bubble of compressed dimensionality, having a diameter of only 23 centimeters in normal space.{{Ref/Novel|Gla|Chapter=10}} The slipspace bubble was located in the center of the artificial planet Onyx before the planet dissolved and the slipspace rift was deactivated.{{Ref/Novel|Id=glass378|Gla|Page=378}} The sphere itself is approximately two astronomical units (300 million kilometers) in diameter and weighs approximately 1.37 solar masses. The Dyson sphere's default environmental conditions are suitable for [[Earth]]-based life but the climate settings can be adjusted for other species' requirements. When Onyx was intact, the only means of access to Shield World 006 was a small portal, which was located inside a [[Core room antechamber|massive antechamber]] in the core of the artificial planet.{{Ref/Reuse|goo311}}
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| Near the end of the [[Onyx Conflict]] on [[2552#November|November 3, 2552]], Covenant [[Fleet Master]] [[Voro Nar 'Mantakree]] led [[Joyous Exultation Covenant|his forces]] in an attempt to access Shield World 006. However, [[SPARTAN-II program|Spartan]] [[Kurt Ambrose]] detonated a pair of [[FENRIS nuclear warhead]]s within the core room antechamber after his comrades had passed through the portal, denying the Covenant access. The human survivors, including Spartan-II [[Blue Team]], several [[SPARTAN-III Program|Spartan-IIIs]], Dr. [[Catherine Halsey]], and [[Senior Chief Petty Officer]] [[Franklin Mendez]], were then trapped within the shield world. Shortly thereafter, the installation's [[Onyx Sentinel|Sentinels]] destroyed the artificial surface of Onyx.{{Ref/Novel|GoO|Page=378}} After spending several days in the sphere — over three months in normal space-time — the survivors encountered a population of [[Huragok]] which had been left behind to maintain the sphere. They eventually managed to convince the Huragok into transitioning the shield world into normal space.{{Ref/Novel|Gla|Page=380}} Soon after, the Office of Naval Intelligence made the installation into a research facility to acquire the Forerunner technologies housed there.{{Ref/Reuse|glass397}} With the outbreak of the [[Created conflict]], the residents of the shield world had it returned to slipspace to act as a measure of protection against [[Cortana]] and her [[Created]] servants. However, conflict continues between the joint human-Sangheili forces on the shield world and the [[Servants of the Abiding Truth]] who later retreated to [[Mackintosh]], a planet in the [[Zeta Doradus system]] that had been caught in Sarcophagus' orbit when it had been removed from slipspace. Mackintosh was subsequently pulled into the slipspace bubble with the shield world when the residents ordered its return for their protection against the Created.{{Ref/Novel|LoO}}
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| ===Shield World 0111===
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| {{Main|Genesis}}
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| Shield World 0111, formally know as Genesis, is a shield world{{Ref/Novel|Id=POL40|PoL|Chapter=40}} utilized for the construction of ‘seed worlds’; mining natural satellites physically placed in orbit around the installation. Genesis used these resources to develop new worlds, populating them with the incredibly vast diversity of flora and fauna teeming on its own surface, so that they could be used for civilizations in need of them. In addition to this, Genesis housed a critical gateway facility connecting it to the Domain, an enigmatic information repository utilized by the Forerunners.{{Ref/Site|URL=https://www.halowaypoint.com/en-us/universe/locations/genesis|Site=Halo Waypoint|Page=Genesis|D=09|M=3|Y=2021}}
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| ===Shield World 0459===
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| {{Main|Etran Harborage}}
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| Shield World 0459 (formally known as the Etran Harborage; original name loosely translated as Trove)<ref>''[[Halo Legendary Crate]]'', ''[[Halo Legendary Crate/Data Drops|Data Drop #4]]''</ref> was a standard conservation sphere: a hollow construct with a terraformed surface and an artificial star, surrounded by an artificial planetary shell. The interior of this construct could be accessed through one of the numerous access tunnels located around the surface. Like many shield worlds, Shield 0459 harbored a fleet of {{Class|Sojourner|dreadnought}}s for the defense of its inhabitants. At some point, much of the planet's surface had been consumed by the Flood, giving it a barren, desert appearance.
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| During the [[Battle of Trove|campaign on the installation]] in [[2531#February|February 2531]], the crew of the {{UNSCShip|Spirit of Fire}} encountered the Flood on the surface of and later within the shield world. Upon rescuing [[Ellen Anders|Professor Ellen Anders]], whom [[Arbiter]] [[Ripa 'Moramee]] had captured to activate the installation's fleet of Forerunner dreadnoughts, the crew realized the danger this fleet could pose to humanity. Thus, they decided to sacrifice ''Spirit of Fire's'' [[Shaw-Fujikawa Translight Engine|slipspace drive]], causing a supernova within the shield world's artificial star and destroying the vessels. This plan was successful: Shield 0459 was pulverized by the ensuing explosion, the dreadnoughts were destroyed, and all the Covenant forces and Flood forms on the installation were killed.{{Ref/Reuse|Escape}}
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| In [[2557]], the debris field from the installation was rediscovered by the ''[[Ace of Spades]]'', captained by [[Rion Forge]], daughter of [[Sergeant]] [[John Forge]] who had destroyed it in the first place. The crew was able to recover [[Little Bit]], a fragment of the installation's AI.{{Ref/Novel|SaS}} After being captured by ONI, the crew had Little Bit stolen from them along with all of their data and personal possessions. After [[Mission to the Korinth Prior system|a mission]] to the system encountered a Covenant battlegroup led by [[Gek 'Lhar]], the UNSC sent a massive fleet to the system that launched a nuclear bombardment against the debris field. The bombardment blew the remains of the installation to bits and disrupted its orbit around the [[Korinth Prior system]]'s dwarf star. Anything that survived would most likely fall into the star's gravity and be destroyed, completely eradicating the shield world and keeping it out of enemy hands.{{Ref/Novel|Ren}}
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| ===Shield World 0673===
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| {{Main|The Refuge}}
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| Shield World 0673 (renamed "the Refuge" by the [[Ussans]]) was another unique type of shield world and possibly the last shield installation to be constructed.{{Ref/Reuse|Have S'moa}}{{Ref/Reuse|hbc76}} Like Requiem it housed a terrestrial environment protected by a metallic shell. Overseen by the monitor [[Enduring Bias]], the shield world's most extraordinary feature was its ability to break its outer shell apart and disperse the components across the [[asteroid]] belt of the [[Ussan system|system]] in the event the interior was compromised.{{Ref/Reuse|hbc76}}
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| In the [[Covenant]]'s early years [[Ussa 'Xellus]], the leader of a [[Sangheili]] resistance movement against the Covenant, used the shield world as a refuge for his followers until they could gather enough strength to strike against the Covenant.{{Ref/Novel|BC|Page=46}} The [[Ussans|Ussan faction]] remained in the shield world, which they named the Refuge, for thousands of years until their rediscovery by Covenant fleeing the [[Great Schism]] in [[2553]].{{Ref/Novel|BC|Page=301-307}}
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| ===Shield World 0983===
| | Near the end of the [[Battle of Onyx]] on [[2552#November|November 3, 2552]], Covenant [[Fleet Master]] [[Voro Nar 'Mantakree]] led his forces in an attempt to access the Sharpened Shield. However, [[SPARTAN-II Program|SPARTAN]] [[Kurt-051]] detonated a pair of [[FENRIS nuclear warhead]]s within the core room antechamber after his comrades had passed through the portal, denying the Covenant access. The human survivors, including SPARTAN-II [[Blue Team]], several [[SPARTAN-III Program|SPARTAN-IIIs]], [[Catherine Elizabeth Halsey|Dr. Catherine Halsey]], and [[Senior Chief Petty Officer]] [[Franklin Mendez]], were then trapped within the shield world. Shortly thereafter, the installation's [[Onyx Sentinel|Sentinels]] destroyed the artificial surface of Onyx.<ref>'''Halo: Ghosts of Onyx''', ''page 378''</ref> After spending several days in the sphere — over three months in normal space-time — the survivors encountered a population of [[Huragok]] which had been left behind to maintain the sphere. They eventually manged to convince the Huragok into transitioning the shield world into normal space.<ref>'''Halo: Glasslands''', ''page 380''</ref> Soon after, the Office of Naval Intelligence made the installation into a research facility in order to acquire the Forerunner technologies housed there.<ref name="glass397"/> |
| {{Main|Bastion}}
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| Shield World 0983 (referred to as "Bastion") was a shield world that acted as the [[Librarian]]'s secret laboratory outside of the purview of the [[Ecumene Council]] containing her most dangerous research and experiments.{{Ref/Reuse|PoL41}} It was built using the template of [[Earth]] with the shield world's inner surface resembling an exact copy of humanity's home world.{{Ref/Reuse|PoL39}} Upon returning from [[Path Kethona]] with specimens that grew from two deceased [[Precursor]]s, the crew of the ''[[Audacity]]'' transformed a small shield world in its construction phase into Bastion to nurture the eventual new species created from the Precursor samples with the intention of one day sending them to a world outside of the Milky Way galaxy where they could grow and rebirth the Precursors as something entirely new with a blank slate.{{Ref/Reuse|PoL44}}
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| In [[2558]], Bastion was rediscovered by [[Rion Forge]] and [[343 Guilty Spark]].{{Ref/Reuse|PoL38}}{{Ref/Reuse|PoL39}} After the personality imprint of [[Keeper-of-Tools]] transmitted himself to Bastion,{{Ref/Reuse|POL40}} he launched the ''[[Eden (spaceship)|Eden]]'' to deliver the samples to their new home to begin the rebirth process.{{Ref/Novel|Id=PoL41|PoL|41}} Using the Librarian's key, Spark became the caretaker of Bastion and launched the shield world into a [[slipspace portal]] to an unknown destination in order to keep it out of the hands of [[Cortana]] and the [[Created]].{{Ref/Reuse|PoL42}}{{Ref/Reuse|PoL43}}{{Ref/Reuse|PoLEpilogue}}
| | ===Shield 0459=== |
| | {{Main|Shield 0459}} |
| | Shield 0459 was a standard conservation sphere: a hollow construct with a terraformed surface and an artificial star, surrounded by an artificial planetary shell. The interior of this construct could be accessed through one one numerous access tunnels around the surface. Like many shield worlds, Shield 0459 harbored a fleet of dreadnoughts for defense of its inhabitants. At some point, much of the planet's surface had been consumed by the Flood, giving it a barren, desert-like appearance. |
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| ===Shield World 10021===
| | During the [[Battle of Shield 0459]] in [[2531#February|February 2531]], the crew of the {{UNSCship|Spirit of Fire}} encountered the Flood on the surface of and later within the shield world. Upon rescuing [[Ellen Anders|Professor Ellen Anders]], whom [[Arbiter]] [[Ripa 'Moramee]] had captured in order to activate the installation's fleet of Forerunner dreadnoughts, the crew realized the danger this fleet could pose to humanity. Thus, they decided to sacrifice ''Spirit of Fire'''s [[Shaw-Fujikawa Translight Engine|slipspace drive]], causing a supernova within the shield world's artificial star and destroying the vessels. This plan was successful: Shield 0459 was pulverized by the ensuing explosion, the dreadnoughts were destroyed, and all the Covenant forces and Flood forms on the installation were killed.<ref name="Escape"/> |
| {{Main|Shield World 10021}}
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| Shield World 10021 served as an archive for the [[Juridical]] [[rate]]. This shield world was located in the [[Orion Arm|Orion Spur]] of the [[Milky Way]].{{Ref/Book|HWF|Page=13}}
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| ===Cloister===
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| {{Main|Cloister}}
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| A Forerunner shield world that the [[San'Shyuum]] [[San'Shyuum flotilla|flotilla]] intended to retreat to.{{Ref/Novel|Id=DW|DW|Chapter=5}} However, it was unknown if they ever succeeded in reaching it.
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| ==Trivia== | | ==Trivia== |
| *[[Cortana]]'s line in the [[Halo 3 Announcement Trailer|''Halo 3'' announcement trailer]], ''"I am your shield. I am your sword,"'' echoes the Forerunners' reference to the shield worlds as "the Shield" and the Halos as "the Sword".
| | [[Cortana]]'s line in the [[Halo 3 Announcement Trailer|''Halo 3'' announcement trailer]], ''"I am your shield. I am your sword,"'' echoes the Forerunners' reference to the shield worlds as "the Shield" and the Halos as "the Sword". |
| *The destruction of two shield worlds involved a [[supernova]]. [[Trove]] was destroyed when the {{UNSCShip|Spirit of Fire}}'s FTL reactor was used to cause the internal sun to go supernova while the destruction of [[Requiem]] in its sun [[Epoloch system|Epoloch]] caused Epoloch to go supernova.
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| ==Gallery== | | ==Gallery== |
| <gallery> | | <gallery> |
| File:Overlayed.png|The fully mechanized surface of [[Requiem]] in ''[[Halo 3]]''. | | File:Halowars shieldworld official.jpg|Shield 0459's artificial planetary surface. |
| File:HW TroveOrbit MattePainting.jpg|[[Trove]]'s artificial planetary surface in ''[[Halo Wars]]''.
| | File:ShieldWorldOuterSurface.png|''Spirit of Fire'' hovering over a barren landscape on Shield 0459. |
| File:ShieldWorldOuterSurface.png|''Spirit of Fire'' hovering over a barren landscape on the Etran Harborage. | | File:SofInShieldWorld.png|''Spirit of Fire'' inside one of Shield 0459's access tunnels. |
| File:SofInShieldWorld.png|''Spirit of Fire'' inside one of the Etran Harborage's access tunnels. | | File:Hw ShieldW buildings.png|Structures in Shield 0459's interior. |
| File:Hw ShieldW buildings.png|Structures in the Etran Harborage's interior. | | File:HW25.png|Shield 0459's artificial star. |
| File:HW25.png|Etran Harborage's artificial star. | | File:Onyxbetter.jpg|Onyx, the artificial planet that concealed the Sharpened Shield. |
| File:Onyxbetter.jpg|[[Onyx]], the artificial planet that concealed [[Sarcophagus]], in ''[[Birth of a Spartan]]''. | |
| File:Requiem.png|[[Requiem]] with one of its entrance portals open in ''[[Halo 4]]''.
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| File:H4 - Requiem portals.jpg|Requiem's entrance portals.
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| File:HBC FullCoverArt.jpg|[[The Refuge]] disassembling itself in ''[[Halo: Broken Circle]]''.
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| </gallery> | | </gallery> |
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| ==List of appearances== | | ==List of appearances== |
| | *''[[Halo 3]]'' {{Mo}} |
| | *''[[Halo 4]]'' |
| | *''[[Halo Wars]]'' |
| *''[[Halo: Ghosts of Onyx]]'' {{1st}} | | *''[[Halo: Ghosts of Onyx]]'' {{1st}} |
| *''[[Halo 3]]''
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| **''[[Bestiarum]]'' {{Mo}}
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| *''[[Halo Wars]]''
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| *''[[Halo: Cryptum]]'' {{Mo}} | | *''[[Halo: Cryptum]]'' {{Mo}} |
| *''[[Halo: Glasslands]]'' | | *''[[Halo: Glasslands]]'' |
| *''[[Halo Primordium]]'' {{Mo}}
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| *''[[The Commissioning]]''
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| *''[[Halo: The Thursday War]]''
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| *''[[Scanned]]''
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| *''[[Halo 4]]''
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| **''[[Terminal (Halo 4)|Terminals]]''
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| **''[[Spartan Ops]]''
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| *''[[Halo: Silentium]]''
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| *''[[Halo: Escalation]]''
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| *''[[Halo: Broken Circle]]''
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| *''[[Halo: Last Light]]'' {{Mo}}
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| *''[[Halo 5: Guardians]]''
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| *''[[Halo Mythos]]''
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| *''[[Halo Fractures]]''
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| **''[[Lessons Learned]]''
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| *''[[Halo: Smoke and Shadow]]'' {{C|Fragments only}}
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| *''[[Halo: Legacy of Onyx]]''
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| *''[[Halo: Bad Blood]]''
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| *''[[Halo: Renegades]]'' {{C|Fragments only}}
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| *''[[Halo: Point of Light]]''
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| *''[[Halo: Divine Wind]]'' {{Mo}}
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| *''[[Halo: Trial of Reckoning]]'' {{Mo}}
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| *''[[Halo: Epitaph]]''
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| ==Sources== | | ==Sources== |
| {{Ref/Sources|2}}
| | <references/> |
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| {{Forerunner|array}} | | {{Forerunner2}} |
| [[Category:Forerunner installations]] | | [[Category:Places]] |
| [[Category:Shield worlds| ]] | | [[Category:Onyx]] |
| | [[Category:Forerunner technology]] |
