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{{Era|Forerunner|HCW}}
{{Status|Canon}}
{{ArticleName}}
{{Megastructure infobox
{{Haloring
|image=[[File:HW TroveOrbit MattePainting.jpg|300px]]
|name=
|description=Hollow planetary shell with terrestrial inner and outer surfaces
|image=[[File:Halowars shieldworld official.jpg|300px]]
|location=[[Korinth Prior system]], fourth major body, [[Milky Way|Cygnus Arm]]{{Ref/Book|HWF|Page=12}}
|Location=
|anchor=
|Monitor=[[Unidentified ancilla (Shield World)|Unidentified ancilla]]
|type=[[Shield world]]
|Status=Destroyed
|function=Fortress world and conservation facility
|Date of Construction=During the [[Forerunner-Flood War]]
|caretaker=[[295 Harken Watch]]{{Ref/Reuse|Enc22}}<br>[[Unidentified ancilla (Shield World 0459)|Unidentified ancilla]]
|Date of Destruction=[[2531#February|February 25, 2531]]
|constructed=During or before the [[Forerunner-Flood war]]
|Diameter=Approximately 2900 kilometers<ref group="note">According to a hologram of the Shield World in the final cinematic of ''Halo Wars'', the distance from an exit portal to the sun in the center is 1,437,572.31 meters (1437.6 km). This would mean that the diameter of the installation is approximately 2875 kilometers.</ref>
|destroyed=[[2531#February|February 25, 2531]] {{c|Shield world}}{{Ref/Reuse|Escape}}<br>[[2557#June|June 29, 2557]] {{c|Debris field}}{{Ref/Reuse|HRC24}}
|diameter={{Convert|2875|km|mi|sp=us}}{{Ref/Reuse|vis}}
|surface width=
|gravity=0.998 G (approx){{Ref/Reuse|vis}}
|surface temperature=10°C to 31°C (50°F to 87°F){{Ref/Reuse|vis}}
|atmosphere=1.05 ([[Wikipedia:Nitrogen|N<sub>2</sub>]], [[Oxygen|O<sub>2</sub>]], [[Argon|Ar]]){{Ref/Reuse|vis}}
}}
}}
{{Quote|So...am I the only one freaked out by the fact that we're inside the planet?|[[Serina]]}}


This '''Flood-controlled Shield World''' was a [[Forerunner]] [[Shield World|Shield installation]] deep in uncharted space. A variation upon the Shield World concept, originally intended to protect sentient lifeforms from the effects of the [[Halo Array]] and the [[The Flood|Flood]], it also served as a [[The Apex|port]] for a fleet of [[Unidentified Forerunner starship|Forerunner Ships]]. Despite the fact that the Shield Worlds were created as a haven from the Array and the Flood, the external surface was heavily infested with Flood biomass, with forms of various types freely roaming across the surface. [[Sentinel]]s were a rarity on the outside, but this changed within the center, where the many Forerunner constructs worked to prevent the Flood from claiming the interior as well.<ref>'''Halo Wars''', campaign levels ''[[Beachhead (Halo Wars level)|Beachhead]]'', ''[[Reactor]]'' and ''[[Escape]]''</ref>
'''Trove''' ('''[[Shield World]] 0459''') was a shield installation constructed by the [[Forerunner]]s, located in the [[Korinth Prior system]].{{Ref/Book|Id=Enc22|Enc22|Page=358}} In formal cadence, Trove was known as the '''Etran Harborage''',<ref name="lootcrate4">''[[Halo Legendary Crate]]'', ''[[Halo Legendary Crate/Data Drops|Data Drop #4]]''</ref> owing to the [[Apex Site]] housed within which served as a port for a fleet of {{Class|Sojourner|dreadnought}}s and their docking battle stations.{{Ref/Reuse|Enc22}}{{Ref/Game|HW}} In addition to these functions, Trove served as a conservation sphere, and was intended to protect sentient lifeforms from the effects of the [[Halo Array]] and the [[Flood]].{{Ref/Book|Id=vis|EVG|Page=174}}


During the [[Human-Covenant War]], the Shield World was discovered by the [[Covenant Empire|Covenant]] during the [[Battle of Arcadia]] and was subsequently destroyed in the [[Battle of the Flood-controlled Shield World]] in [[2531#February|February 2531]].
Despite shield worlds being created as a haven from the Halos and the Flood, the external surface was heavily infested with Flood biomass, with forms of various types freely roaming across the surface. [[Sentinel]]s were a rarity on the outside, but this changed within the center, where the many Forerunner constructs worked to prevent the Flood from claiming the interior as well.{{Ref/Level|Id=Beachhead|HW|Beachhead (Halo Wars level)|Beachhead}}{{Ref/Level|Id=Reactor|HW|Reactor (Halo Wars level)|Reactor}}{{Ref/Level|Id=Escape|HW|Escape (Halo Wars level)|Escape}}


==Structure==
Trove was discovered by the [[Covenant]] sometime prior to [[2531]]. February that year during the [[Human-Covenant War]] saw its destruction by the [[United Nations Space Command]] at the end of a [[Battle of Trove|battle]].{{Ref/Reuse|Escape}} A debris field persisted for [[2557|26 years]], at which point a UNSC fleet cleared it on June 29 following its discovery in order to keep it out of the hands of [[Gek 'Lhar]], [[Jul 'Mdama's Covenant]], and anyone else who would try to exploit the surviving technologies for their own benefit.{{Ref/Novel|Id=HRC24|Ren|Chapter=24}}
[[File:ShieldWorld_matte_1.png|thumb|250px|The Shield World's inner surface.]]
This [[Shield World]]'s main structure consisted of the outer surface, the superstructure and tunnel system inside the crust, and the inner [[Dyson sphere|Micro Dyson Sphere]], along with it's own miniaturized [[Astroengineering #Stars|artificial sun]]. The outer surface, as well as parts of the superstructure, were largely infested with the [[The Flood|Flood]]. Some of the Flood even reached to the interior of the world through openings like vents, but because of the larger numbers of [[Sentinel]]s, never managed to fully infest it.


The ecosystems of the interior and the exterior were radically different, the outer surface being a rocky wasteland with large bodies of water and Flood biomass in some areas. The atmosphere was thick with dust, which may have been a defensive measure to disable starships and prevent them from carrying the Flood off-world.<ref>'''[[Halo Wars Timeline Events]]'''</ref> Parts of the superstructure were also seen on the surface, with chasms reaching deep down into the interior.
==Overview==
[[File:Old HW Horizon.png|thumb|250px|Trove's inner surface.]]
This shield world's main structure consisted of the outer surface, the superstructure and tunnel system inside the crust, and the inner miniature [[Dyson sphere]], along with its own miniaturized [[Astroengineering#Stars|artificial sun]] to provide illumination. A series of latitudinal support ribs encircled the megastructure; these were clearly visible on the inner surface. The outer surface, as well as parts of the superstructure, were largely infested with Flood forms. Some of the Flood even reached the interior of the world through openings such as vents, but because of the larger numbers of Sentinels, never managed to fully infest it.


The inner Dyson Sphere was completely terraformed and full of plant and animal life, much like the [[Halo Array|Halo installations]] or [[Installation 00|the Ark]]. It also featured different types of Forerunner structures, which in many places were more prominent on the surface than on other Forerunner installations. In the center of the Micro Dyson Sphere there was a miniaturized [[Astroengineering#Stars|artificial star]]. The inner surface had latitudinal lines of structures encircling the sphere. Like many other Forerunner installations, this Shield World possessed a [[teleportation grid]].
The ecosystems of the interior and the exterior were radically different, the outer surface being a rocky wasteland with large bodies of water and Flood biomass in some areas. The atmosphere was thick with dust, which may have been a defensive measure to disable starships and prevent them from carrying the Flood off-world.{{Ref/Game|HW|[[Halo Wars Timeline Events|Timeline Events]]}} Parts of the superstructure could be seen on the surface, with chasms reaching deep down into the interior.
 
The inner Dyson shell was completely terraformed and full of plant and animal life, much like the [[Halo Array|Halo installations]] or [[Installation 00|the Ark]]. It featured different types of Forerunner structures, ranging from spires to various walls or embankments and rifts leading into the interior of the structure. Like many other Forerunner installations, Trove possessed a [[teleportation grid|translocation grid]] in form of a network of [[teleporter]]s.{{Ref/Reuse|Beachhead}}


===Access tunnels===
===Access tunnels===
[[File:HW_FR_Architecture2_S-1-.jpg|thumb|250px|The Shield World's tunnel system.]]
[[File:HW ShieldWorld Entrance Concept.jpg|thumb|250px|The shield world's tunnel system.]]
The surface of the Shield World had multiple access portals, which could be used to gain access to the Shield World. Most of them were likely hidden, for example covered under large bodies of water, such as the one the {{UNSCShip|Spirit of Fire}} used to enter the Shield World. The access portals were seemingly automated, and controlled by [[unidentified ancilla (Shield World)|an AI]].
The surface of Trove had multiple access portals, which could be used to gain access to the interior of the planet. Most of them were likely hidden; for example, the portal through which the {{UNSCShip|Spirit of Fire}} entered the interior was covered under a large body of water. [[unidentified ancilla (Shield 0459)|The AI]] in control of these access portals would activate docking sequence when a ship passed over one, forcibly dragging the vessel inside by way of a series of field-projecting pylons on the outer surface.{{Ref/Level|HW|Shield World (level)|Shield World}}
Within the tunnels inside the superstructure, there was a cleansing system, which prevented the Flood from entering the interior. This quarantine system consisted of several "Cleansing Rings", which created energy fields within their diameter, which would destroy any Flood biomass on a passing ship.
 
On the interior, these portals had six interlocks that needed to be opened in order to unlock the access to the tunnel, and they could only be operated by a [[Reclaimer]].
The tunnels inside the structure had a cleansing system which prevented the Flood from entering the interior. This quarantine system consisted of several "cleansing rings", which generated energy fields within their diameter, which would destroy any Flood biomass on a passing ship.{{Ref/Level|HW|Cleansing}} On the interior, these portals had six interlocks that needed to be opened in order to unlock the access to the tunnel, and like other significant systems on the installation, they could be operated only by a [[Reclaimer]].{{Ref/Reuse|Escape}} However, these interlocks only appeared to be triggered by the presence of the Flood nearby as the Covenant were able to enter and exit the interior shield world at will.


===The Apex===
===The Apex===
{{Main|The Apex}}
{{Main|Apex Site}}
The Apex site was an installation comprised of a control center on a platform high above the inner surface of the Shield World, and numerous docking towers containing a fleet of Forerunner Ships. The control center was accessible from the ground by a teleporter referred to as Apex Base site, which was on top of a plateau with a series of ramps leading up to it.  
The Apex Site was an installation comprised of a control center on a platform high above the inner surface of Trove, and numerous docking towers containing a fleet of Forerunner {{Class|Sojourner|dreadnought}}s. The control center was accessible from the ground by a teleporter at the Apex Base Site, which was situated on top of a plateau with a series of ramps leading up to it.{{Ref/Reuse|Reactor}}


==History==
==History==
[[File:ShieldWorldOuterSurface.png|thumb|right|250px|The Spirit of Fire above the outer surface.]]
[[File:ShieldWorldOuterSurface.png|thumb|250px|''Spirit of Fire'' above Trove's outer surface.]]
===Construction===
===Forerunner-Flood War===
{{Main|Forerunner-Flood War}}
Trove was constructed during or prior to the [[Forerunner-Flood war]] to serve as both a military outpost to combat the Flood, and to preserve the lifeforms within from the Halo Array's pulse. The shield world was fitted with a fleet of ''Sojourner''-class dreadnaughts, ready to be used to raze the inner surface in case of breach by Flood forces or as an exploratory emergence group to be used following the [[Great Purification]]. During the height of the war, the shield world was attacked and its surface overrun by Flood forces, an event which was able to severely damage the installation's [[Monitor]], [[295 Harken Watch]]. Three [[Promethean]]s, [[Animus-To-Remain]], [[Malice-Begets-Demise]] and [[Habit-To-Sever]], stayed behind on the shield world's surface and gave their lives to defend the Monitor from encroaching Flood - ultimately allowing the Monitor to escape and seal the shield world's interior off.{{Ref/Reuse|Enc22}}
The Shield Installation was constructed during the Forerunner-Flood War. Though structurally different from the Onyx installation, the Shield World would be built for the same purpose: to serve as a bomb shelter from the Halo Array's pulse. Due to the betrayal of the [[Artificial intelligence|AI]] construct [[05-032 Mendicant Bias|032 Mendicant Bias]] however, their intended occupants never settled in the Shield Worlds and the megastructures would remain empty for millennia to come.


At some point, the Installation became heavily overrun by Flood. Exactly how this occurred is unknown; it would seem that they either escaped containment facilities some time after the Halo Array's activation, or managed to survive by seeking shelter in the interior of the Shield World and later colonized the outside.
The Flood contamination on the shield world's exterior remained present for millennia following the firing of the [[Halo Array]]. However, a later UNSC expedition to the shield world's ruins suspected the outbreak to be relatively recently as of the 26th century.{{Ref/Reuse|lootcrate4}}


===Human-Covenant War===
===Human-Covenant War===
{{quote|This world shall be the [[The Apex|birthplace]] for an [[unidentified Forerunner starship|invasion fleet]] beyond imagining!|[[Prophet of Regret]]}}
{{quote|This world shall be the birthplace for an invasion fleet beyond imagining!|Prophet of Regret}}
 
Trove was discovered by the Covenant several years before 2531, but then-current Covenant technology could not unlock its secrets. At the outset of the war with [[human]]ity, the Covenant expedited the need to unlock the planet's secrets as to amass a great fleet. They were soon able to break into the interior of the shield world and seal it, though the external Flood infection were noted as persistent. The [[Prophet of Regret]] sent [[Arbiter]] [[Ripa 'Moramee]] to the planet [[Harvest]] to investigate a [[Relic (location)|Forerunner relic]] there that could have held the key.{{Ref/Anthology|Id=OSG|Halo Wars: Official Strategy Guide|The Day Before}}
 
With the Human-Covenant War ongoing, the Covenant hoped to use the shield world's stored warships to crush the UNSC quickly, rather than wage the protracted war. However, they soon discovered that while they were able to access the installation, they were unable to reactivate the fleet.<ref>''[[Halo Waypoint]]'', [http://halo.xbox.com/en-us/Games/detail/a/9ca82aa8-c0bd-4014-8bd6-7bcf3e131e0b ''"The Halo Wars Story Retold"'']</ref>
 
After the Covenant had observed [[Ellen Anders|Professor Ellen Anders]] activating the [[Relic (location)|Forerunner relic]] on [[Harvest]], the Prophet of Regret ordered the Arbiter to go to Arcadia and capture her, as she seemed to have valuable knowledge about the Forerunners. The Arbiter returned to Arcadia on February 10, captured Anders and brought her to the shield world. [[James Cutter|Captain James Cutter]], commanding officer of the {{UNSCShip|Spirit of Fire}}, to which Anders had been assigned, ordered immediate pursuit out-system.{{Ref/Level|HW|Scarab (level)|Scarab}}
 
[[File:ShieldWorldDestruction2.png|thumb|200px|Destruction of the shield world.]]
{{Main|Battle of Trove}}
''Spirit of Fire'' arrived in orbit over the shield world, which appeared to be a normal, albeit desolate planet, on February 23. Ground forces were dispatched to the surface, where they discovered the Flood. Many of the reconnaissance teams were infected and it was discovered that Anders' transponder signal was being duplicated by a [[Proto-Gravemind]]; eventually, the Proto-Gravemind was killed in a concerted attack.{{Ref/Level|HW|Anders' Signal}} A few hours later, the ''Spirit's'' shipboard AI [[Serina]] scanned the planet for the professor's signal, which seemed to be originating from an ocean; the ship was suddenly pulled into the shield world's internal docking mechanism. After passing the tunnels inside the installation's superstructure, the ''Spirit of Fire'' emerged within the internal [[Dyson sphere]].


The Shield World was discovered by the [[Covenant Empire|Covenant]] in [[2531]] using information from [[arcadia Forerunner ruins|a Forerunner complex]] on the planet [[Arcadia]]. After recovering the information, the [[Arbiter]] [[Ripa 'Moramee]] and the [[Prophet of Regret]] traveled to the Shield World, to discover the Apex site and the dormant Forerunner fleet. With the [[Human-Covenant War]] ongoing, the Covenant hoped to use the Shield World's stored warships to crush the [[United Nations Space Command|UNSC]] quickly, rather than wage the protracted war that would characterize the Human-Covenant War. However, they soon discovered that while they were able to access the installation, they weren't able to reactivate the fleet.<ref>'''[[Halo Waypoint]]''', ''"The Halo Wars story retold"'' series</ref>
Some time later, the Arbiter used Anders, who had been kept prisoner at the Apex Site, to activate the fleet of Forerunner ships. However, as the awestruck [[Sangheili]] watched the fleet's activation, Anders managed to escape via the installation's teleportation grid and regroup with the other humans.{{Ref/Reuse|Beachhead}} She then created a plan to prevent the Covenant from using the Forerunner fleet which involved transporting the reactor of the ''Spirit of Fire's'' [[Shaw-Fujikawa Translight Engine]] to the Apex Site and from there into Trove's [[Astroengineering#Stars|artificial sun]].{{Ref/Reuse|Reactor}} Once the ''Spirit of Fire'' opened the [[door interlock]]s blocking the ''Spirit of Fire'' from exiting the shield world, [[Sergeant]] [[John Forge]] detonated the reactor inside the sun, causing it to go [[supernova]]. The supernova obliterated the Dyson sphere and caused the outer planet to blow up in an immense explosion that left a massive debris cloud.


After the Covenant had observed [[Ellen Anders|Professor Ellen Anders]] activating the [[Relic|Forerunner relic]] on [[Harvest]], the Prophet of Regret ordered the Arbiter to go to Arcadia and capture the human scientist, as she seemed to have unusual knowledge about the Forerunners. The Arbiter went back to Arcadia, captured Anders and brought her to the Shield World.  
The destruction of Trove destroyed the Flood and Covenant forces on the planet as well as the Forerunner fleet, depriving the Covenant of their planned advantage over the humans using the ships. However, using their Slipspace drive to destroy the planet resulted in the ''Spirit of Fire'' being stranded far from human space with no way home.{{Ref/Reuse|Escape}}


[[File:ShieldWorldDestruction2.png|thumb|200px|Destruction of the Shield World.]]
===Remnants===
{{Main|Battle of the Flood-controlled Shield World}}
After hijacking the {{UNSCShip|Rubicon}} in [[2554]], [[343 Guilty Spark]] intended to take the ship to Trove to obtain an [[upgrade seed]] in order to better prepare the ship for his planned mission to find the [[Librarian]]. However, the ship was destroyed before he could complete the journey and Spark had been unable to connect with the shield world's [[ancilla]], [[295 Harken Watch]], for some time, leaving him unaware that the planet had been destroyed.{{Ref/Novel|Ren|Page=142-143}}
The ''Spirit of Fire'' followed the Covenant in close pursuit, tracking Anders' transponder signal. When the ''Spirit of Fire'' arrived to the Shield World, a new horrific enemy was discovered: [[the Flood]]. Some time later, when the ''Spirit'''s shipboard [[Artificial intelligence|AI]] [[Serina]] scanned the planet for Anders' signal, which seemed to be originating from an ocean, the ship was suddenly pulled into the Shield World's internal docking mechanism. After passing the tunnels inside the installation's superstructure, the ''Spirit of Fire'' emerged into the internal [[Dyson sphere]].


Some time later, the Arbiter used Anders, who had been kept prisoner within [[the Apex]], to activate the fleet of Forerunner ships. However, as the awestruck Elites watched the fleet's activation, Anders managed to escape via the installation's [[teleportation grid]] and regroup with the other humans. She quickly came up with a plan to prevent the Covenant from using the Forerunner fleet: They overloaded the ''Spirit of Fire'''s [[Shaw-Fujikawa Translight Engine]] to create a chain reaction in the [[Astroengineering#Stars|artificial sun]] in the center of the Shield World, sending it to [[supernova]] state and destroying it from within. The ''Spirit of Fire'' was able to escape the Shield World's destruction.
The debris field that was left by Trove's destruction was eventually rediscovered by the ''[[Ace of Spades]]'' in [[2557]] with the ship's captain, [[Rion Forge]], searching for the {{UNSCShip|Spirit of Fire}} and her missing father [[John Forge]]. The ship was able to recover [[Little Bit]], a fragment of the shield world's AI and learn of what had happened.{{Ref/Novel|SaS}} The crew was later forced to turn over what it had learned to [[ONI]] along with Little Bit.{{Ref/Novel|Ren}} [[343 Guilty Spark]] and [[Niko]] eventually managed to extract a copy of Little Bit from his projections on where the ''Spirit of Fire'' had gone after leaving the shield world and fully repair him. Little Bit would go on to become the ''Ace of Spades'' AI.{{Ref/Novel|PoL}}


==Comparison with the Onyx Installation==
{{Main|Mission to the Korinth Prior system}}
Unlike [[Onyx]], which was made of trillions of [[Onyx Sentinel|Sentinels]], upon which a planetary surface had been formed, and a massive Dyson sphere residing in a compressed [[Slipstream space|slipspace]] bubble in the center of the construct, this Shield World was far simpler. This Shield World was comprised of a hollow structure with planetary surfaces on the interior and exterior. The internal Dyson sphere was somewhat similar to Onyx's Dyson sphere, being terraformed and possessing an artificial sun, though it and the entire structure were on a far smaller scale. However, unlike Onyx, it was apparently not designed only as a shelter from the [[Halo Array]], but also as some sort of harbor, shipyard, or hiding place for ships, as it contained the Apex. While this Shield World was approximately 2900 kilometers in diameter, Onyx's internal Dyson Sphere's diameter is approximately 150 million kilometers.<ref>'''[[Halo: Ghosts of Onyx]]''', ''page 380''</ref>
Using the data from the ''Ace of Spades'' and Little Bit, the [[prowler]] {{UNSCShip|Taurokado}} embarked upon a mission to the debris field where it encountered a Covenant battlegroup led by [[Gek 'Lhar]]. The ''Taurokado'' retreated from the system following the encounter while the Covenant forces began harvesting the remnants for their own usage.


This Shield World had dozens of Forerunner ships stored within it. It is unknown whether the same is true for the Onyx installation.
At the same time, in order to complete his mission, Spark brought the ''Ace of Spades'' back to Trove to get an [[upgrade seed]] for the ship, unaware that the planet had been destroyed. As further incentive for the crew to help him, Spark offered access to the wealth of Forerunner technology within as much needed salvage. As the salvage ship struggled to evade the Covenant, a massive UNSC fleet emerged from slipspace and opened fire on the debris field with [[nuclear weapon]]s to deny its assets to the Covenant. The nuclear weapons would blow the debris to bits and disrupt its gravity around the system's dwarf star. Whatever survived would likely be pulled into the star itself, completely eradicating the shield world. The Covenant fleet retreated into slipspace to avoid being destroyed while Spark managed to get the ''Ace of Spades'' into slipspace in time to avoid destruction as well.{{Ref/Reuse|HRC24}}
{{Expand-section}}


==Trivia==
==Trivia==
*In the cutscenes that show the inner surface of the Shield World, lines of Forerunner structures can be seen across the land. These could be Forerunner cities.
{{#widget:Vimeo|id=5079411|width=300|height=170|thumb|caption=Animation breakdown of Trove's destruction}}
*While in the pre-rendered cinematics the lines on the inner surface of the Shield World are latitudinal, they are longitudinal in-game in the level ''Repairs''. The appearance of the surface is also different. However, this is probably just due to in-game graphical limitations.
*While in the pre-rendered cinematics the lines on the inner surface of the shield world are latitudinal, they are longitudinal in-game in the level ''Repairs''. The appearance of the surface is also different, which is likely due to the disparity between the in-game graphics engine and the pre-rendered cutscenes.
*The concept of a hollow planet with a habitable inner surface is similar to that of a [[Wikipedia:Globus Cassus|Globus Cassus]], a proposal to use the [[Earth]] as building materials to build an enormous hollow megastructure around Earth.


==Gallery==
==Gallery==
<gallery>
<gallery>
File:Shieldogram.png|A [[Holography|hologram]] of the Shield World.
File:Old HW AboveTheClouds.png|Concept art of the [[Apex Site]]'s docking towers on the inner surface.
File:SofInShieldWorld.png|UNSC ''Spirit of Fire'' inside the Shield World's superstructure.
File:HW_ShieldWorld_Portal_Concept.jpg|Concept art for the entrance to the shield world.
File:ShieldW_Surface_Closeup.png| The [[The Flood|Flood]]-infested outer surface of the Shield World.
File:Shieldogram.png|A [[Holography|hologram]] of Trove in ''[[Halo Wars]]''.
File:Halo_Wars_shield_world_Matte_by_JJasso-1-.jpg|Surface panorama.
File:SofInShieldWorld.png|{{UNSCShip|Spirit of Fire}} inside the shield world.
File:Old HW Infestation.png| The Flood-infested outer surface of Trove.
File:HW Trove Exterior MattePainting 3.jpg|Panorama of the outer surface.
File:HW Trove Exterior MattePainting 1.jpg|Surface panorama.
File:HW Trove Exterior MattePainting 2.jpg|Surface panorama.
File:Hw_ShieldW_buildings.png|Structures on the inner surface.
File:Hw_ShieldW_buildings.png|Structures on the inner surface.
File:HW21.png|The ''Spirit of Fire'' emerges from an access tunnel.
File:HW21.png|The ''Spirit of Fire'' emerges from an access tunnel.
File:HW25.png|The Shield World's internal star, before going supernova.
File:HW25.png|The shield world's internal star, before going supernova.
File:Shield World Portal.jpg|The portal the UNSC ''Spirit of Fire'' escaped through.
File:HW EscapePortal Concept.jpg|The portal the ''Spirit of Fire'' escaped through.
File:Halo wars big panorama by JJasso-1-.jpg|Panorama of the outer surface.
File:HW Screenshots Live 2.jpg|The Apex control center.
File:Fascination.jpg|The Apex control center.
File:BeachheadOpening.png|The shield world's inner surface.
File:BeachheadOpening.png|The Shield World's inner surface.
File:HM-Cutter&Serina.png|Trove in ''[[Halo Mythos]]''.
File:ShieldWorld_tower_concepts.png|Concept art of the Apex site's docking towers on the inner surface.
File:LC 004 Taurokado.png|The {{UNSCShip|Taurokado}} traversing the shield world's debris field in [[2557]].
</gallery>
</gallery>


==List of appearances==
==List of appearances==
*''[[Halo Wars]]'' {{1st}}
*''[[Halo Wars]]'' {{1st}}
 
*''[[Halo Mythos]]''
==Notes==
*''[[Halo: Tales from Slipspace]]''
<references group="note"/>
**''[[Something Has Happened]]'' {{Mo}}
*''[[Halo: Smoke and Shadow]]'' {{c|Fragments only}}
*''[[Halo Wars 2]]'' {{Mo}}
*''[[Halo: Renegades]]'' {{c|Fragments only}}
*''[[Halo: Point of Light]]'' {{Mo}}
*''[[Halo: Fireside]]'' {{Mo}}


==Sources==
==Sources==
<references/>
{{Ref/Sources}}
 
==Related Links==
*[[The Apex]]
*[[Dyson sphere|Micro Dyson Sphere]]
*[[Shield World]]


{{Forerunner2}}
{{Forerunner|array}}
[[Category:The Forerunner]]
[[Category:Shield worlds]]
[[Category:Planets]]

Latest revision as of 00:27, March 14, 2024

Trove
Matte painting of the outer surface of Trove.
General overview

Description:

Hollow planetary shell with terrestrial inner and outer surfaces

Location:

Korinth Prior system, fourth major body, Cygnus Arm[1]

Operation overview

Type:

Shield world

Function:

Fortress world and conservation facility

Attached AI(s):

295 Harken Watch[2]
Unidentified ancilla

Date of construction:

During or before the Forerunner-Flood war

Date of destruction:

February 25, 2531 (Shield world)[3]
June 29, 2557 (Debris field)[4]

Structural information

Diameter:

2,875 kilometers (1,786 mi)[5]

Gravity:

0.998 G (approx)[5]

Surface temperature:

10°C to 31°C (50°F to 87°F)[5]

Atmospheric composition:

1.05 (N2, O2, Ar)[5]

 

"So...am I the only one freaked out by the fact that we're inside the planet?"
— Serina

Trove (Shield World 0459) was a shield installation constructed by the Forerunners, located in the Korinth Prior system.[2] In formal cadence, Trove was known as the Etran Harborage,[6] owing to the Apex Site housed within which served as a port for a fleet of Sojourner-class dreadnoughts and their docking battle stations.[2][7] In addition to these functions, Trove served as a conservation sphere, and was intended to protect sentient lifeforms from the effects of the Halo Array and the Flood.[5]

Despite shield worlds being created as a haven from the Halos and the Flood, the external surface was heavily infested with Flood biomass, with forms of various types freely roaming across the surface. Sentinels were a rarity on the outside, but this changed within the center, where the many Forerunner constructs worked to prevent the Flood from claiming the interior as well.[8][9][3]

Trove was discovered by the Covenant sometime prior to 2531. February that year during the Human-Covenant War saw its destruction by the United Nations Space Command at the end of a battle.[3] A debris field persisted for 26 years, at which point a UNSC fleet cleared it on June 29 following its discovery in order to keep it out of the hands of Gek 'Lhar, Jul 'Mdama's Covenant, and anyone else who would try to exploit the surviving technologies for their own benefit.[4]

Overview[edit]

Trove's inner surface.

This shield world's main structure consisted of the outer surface, the superstructure and tunnel system inside the crust, and the inner miniature Dyson sphere, along with its own miniaturized artificial sun to provide illumination. A series of latitudinal support ribs encircled the megastructure; these were clearly visible on the inner surface. The outer surface, as well as parts of the superstructure, were largely infested with Flood forms. Some of the Flood even reached the interior of the world through openings such as vents, but because of the larger numbers of Sentinels, never managed to fully infest it.

The ecosystems of the interior and the exterior were radically different, the outer surface being a rocky wasteland with large bodies of water and Flood biomass in some areas. The atmosphere was thick with dust, which may have been a defensive measure to disable starships and prevent them from carrying the Flood off-world.[10] Parts of the superstructure could be seen on the surface, with chasms reaching deep down into the interior.

The inner Dyson shell was completely terraformed and full of plant and animal life, much like the Halo installations or the Ark. It featured different types of Forerunner structures, ranging from spires to various walls or embankments and rifts leading into the interior of the structure. Like many other Forerunner installations, Trove possessed a translocation grid in form of a network of teleporters.[8]

Access tunnels[edit]

The shield world's tunnel system.

The surface of Trove had multiple access portals, which could be used to gain access to the interior of the planet. Most of them were likely hidden; for example, the portal through which the UNSC Spirit of Fire entered the interior was covered under a large body of water. The AI in control of these access portals would activate docking sequence when a ship passed over one, forcibly dragging the vessel inside by way of a series of field-projecting pylons on the outer surface.[11]

The tunnels inside the structure had a cleansing system which prevented the Flood from entering the interior. This quarantine system consisted of several "cleansing rings", which generated energy fields within their diameter, which would destroy any Flood biomass on a passing ship.[12] On the interior, these portals had six interlocks that needed to be opened in order to unlock the access to the tunnel, and like other significant systems on the installation, they could be operated only by a Reclaimer.[3] However, these interlocks only appeared to be triggered by the presence of the Flood nearby as the Covenant were able to enter and exit the interior shield world at will.

The Apex[edit]

Main article: Apex Site

The Apex Site was an installation comprised of a control center on a platform high above the inner surface of Trove, and numerous docking towers containing a fleet of Forerunner Sojourner-class dreadnoughts. The control center was accessible from the ground by a teleporter at the Apex Base Site, which was situated on top of a plateau with a series of ramps leading up to it.[9]

History[edit]

Spirit of Fire above Trove's outer surface.

Forerunner-Flood War[edit]

Trove was constructed during or prior to the Forerunner-Flood war to serve as both a military outpost to combat the Flood, and to preserve the lifeforms within from the Halo Array's pulse. The shield world was fitted with a fleet of Sojourner-class dreadnaughts, ready to be used to raze the inner surface in case of breach by Flood forces or as an exploratory emergence group to be used following the Great Purification. During the height of the war, the shield world was attacked and its surface overrun by Flood forces, an event which was able to severely damage the installation's Monitor, 295 Harken Watch. Three Prometheans, Animus-To-Remain, Malice-Begets-Demise and Habit-To-Sever, stayed behind on the shield world's surface and gave their lives to defend the Monitor from encroaching Flood - ultimately allowing the Monitor to escape and seal the shield world's interior off.[2]

The Flood contamination on the shield world's exterior remained present for millennia following the firing of the Halo Array. However, a later UNSC expedition to the shield world's ruins suspected the outbreak to be relatively recently as of the 26th century.[6]

Human-Covenant War[edit]

"This world shall be the birthplace for an invasion fleet beyond imagining!"
— Prophet of Regret

Trove was discovered by the Covenant several years before 2531, but then-current Covenant technology could not unlock its secrets. At the outset of the war with humanity, the Covenant expedited the need to unlock the planet's secrets as to amass a great fleet. They were soon able to break into the interior of the shield world and seal it, though the external Flood infection were noted as persistent. The Prophet of Regret sent Arbiter Ripa 'Moramee to the planet Harvest to investigate a Forerunner relic there that could have held the key.[13]

With the Human-Covenant War ongoing, the Covenant hoped to use the shield world's stored warships to crush the UNSC quickly, rather than wage the protracted war. However, they soon discovered that while they were able to access the installation, they were unable to reactivate the fleet.[14]

After the Covenant had observed Professor Ellen Anders activating the Forerunner relic on Harvest, the Prophet of Regret ordered the Arbiter to go to Arcadia and capture her, as she seemed to have valuable knowledge about the Forerunners. The Arbiter returned to Arcadia on February 10, captured Anders and brought her to the shield world. Captain James Cutter, commanding officer of the UNSC Spirit of Fire, to which Anders had been assigned, ordered immediate pursuit out-system.[15]

Destruction of the shield world.
Main article: Battle of Trove

Spirit of Fire arrived in orbit over the shield world, which appeared to be a normal, albeit desolate planet, on February 23. Ground forces were dispatched to the surface, where they discovered the Flood. Many of the reconnaissance teams were infected and it was discovered that Anders' transponder signal was being duplicated by a Proto-Gravemind; eventually, the Proto-Gravemind was killed in a concerted attack.[16] A few hours later, the Spirit's shipboard AI Serina scanned the planet for the professor's signal, which seemed to be originating from an ocean; the ship was suddenly pulled into the shield world's internal docking mechanism. After passing the tunnels inside the installation's superstructure, the Spirit of Fire emerged within the internal Dyson sphere.

Some time later, the Arbiter used Anders, who had been kept prisoner at the Apex Site, to activate the fleet of Forerunner ships. However, as the awestruck Sangheili watched the fleet's activation, Anders managed to escape via the installation's teleportation grid and regroup with the other humans.[8] She then created a plan to prevent the Covenant from using the Forerunner fleet which involved transporting the reactor of the Spirit of Fire's Shaw-Fujikawa Translight Engine to the Apex Site and from there into Trove's artificial sun.[9] Once the Spirit of Fire opened the door interlocks blocking the Spirit of Fire from exiting the shield world, Sergeant John Forge detonated the reactor inside the sun, causing it to go supernova. The supernova obliterated the Dyson sphere and caused the outer planet to blow up in an immense explosion that left a massive debris cloud.

The destruction of Trove destroyed the Flood and Covenant forces on the planet as well as the Forerunner fleet, depriving the Covenant of their planned advantage over the humans using the ships. However, using their Slipspace drive to destroy the planet resulted in the Spirit of Fire being stranded far from human space with no way home.[3]

Remnants[edit]

After hijacking the UNSC Rubicon in 2554, 343 Guilty Spark intended to take the ship to Trove to obtain an upgrade seed in order to better prepare the ship for his planned mission to find the Librarian. However, the ship was destroyed before he could complete the journey and Spark had been unable to connect with the shield world's ancilla, 295 Harken Watch, for some time, leaving him unaware that the planet had been destroyed.[17]

The debris field that was left by Trove's destruction was eventually rediscovered by the Ace of Spades in 2557 with the ship's captain, Rion Forge, searching for the UNSC Spirit of Fire and her missing father John Forge. The ship was able to recover Little Bit, a fragment of the shield world's AI and learn of what had happened.[18] The crew was later forced to turn over what it had learned to ONI along with Little Bit.[19] 343 Guilty Spark and Niko eventually managed to extract a copy of Little Bit from his projections on where the Spirit of Fire had gone after leaving the shield world and fully repair him. Little Bit would go on to become the Ace of Spades AI.[20]

Main article: Mission to the Korinth Prior system

Using the data from the Ace of Spades and Little Bit, the prowler UNSC Taurokado embarked upon a mission to the debris field where it encountered a Covenant battlegroup led by Gek 'Lhar. The Taurokado retreated from the system following the encounter while the Covenant forces began harvesting the remnants for their own usage.

At the same time, in order to complete his mission, Spark brought the Ace of Spades back to Trove to get an upgrade seed for the ship, unaware that the planet had been destroyed. As further incentive for the crew to help him, Spark offered access to the wealth of Forerunner technology within as much needed salvage. As the salvage ship struggled to evade the Covenant, a massive UNSC fleet emerged from slipspace and opened fire on the debris field with nuclear weapons to deny its assets to the Covenant. The nuclear weapons would blow the debris to bits and disrupt its gravity around the system's dwarf star. Whatever survived would likely be pulled into the star itself, completely eradicating the shield world. The Covenant fleet retreated into slipspace to avoid being destroyed while Spark managed to get the Ace of Spades into slipspace in time to avoid destruction as well.[4]

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Trivia[edit]

Animation breakdown of Trove's destruction

  • While in the pre-rendered cinematics the lines on the inner surface of the shield world are latitudinal, they are longitudinal in-game in the level Repairs. The appearance of the surface is also different, which is likely due to the disparity between the in-game graphics engine and the pre-rendered cutscenes.

Gallery[edit]

  • Concept art of the Apex Site's docking towers on the inner surface.

    Concept art of the Apex Site's docking towers on the inner surface.

  • Concept art for the entrance to the shield world.

    Concept art for the entrance to the shield world.

  • A hologram of Trove in Halo Wars.

    A hologram of Trove in Halo Wars.

  • UNSC Spirit of Fire inside the shield world.

    UNSC Spirit of Fire inside the shield world.

  • The Flood-infested outer surface of Trove.

    The Flood-infested outer surface of Trove.

  • Panorama of the outer surface.

    Panorama of the outer surface.

  • Surface panorama.

    Surface panorama.

  • Surface panorama.

    Surface panorama.

  • Structures on the inner surface.

    Structures on the inner surface.

  • The Spirit of Fire emerges from an access tunnel.

    The Spirit of Fire emerges from an access tunnel.

  • The shield world's internal star, before going supernova.

    The shield world's internal star, before going supernova.

  • The portal the Spirit of Fire escaped through.

    The portal the Spirit of Fire escaped through.

  • The Apex control center.

    The Apex control center.

  • The shield world's inner surface.

    The shield world's inner surface.

  • Trove in Halo Mythos.

    Trove in Halo Mythos.

  • The UNSC Taurokado traversing the shield world's debris field in 2557.

    The UNSC Taurokado traversing the shield world's debris field in 2557.

List of appearances[edit]

Sources[edit]

  1. ^ Halo: Warfleet, page 12
  2. ^ a b c d Halo Encyclopedia (2022 edition), page 358
  3. ^ a b c d e Halo Wars, campaign level Escape
  4. ^ a b c Halo: Renegades, chapter 24
  5. ^ a b c d e Halo: The Essential Visual Guide, page 174
  6. ^ a b Halo Legendary Crate, Data Drop #4
  7. ^ Halo Wars
  8. ^ a b c Halo Wars, campaign level Beachhead
  9. ^ a b c Halo Wars, campaign level Reactor
  10. ^ Halo Wars, Timeline Events
  11. ^ Halo Wars, campaign level Shield World
  12. ^ Halo Wars, campaign level Cleansing
  13. ^ Halo Wars: Official Strategy Guide - The Day Before
  14. ^ Halo Waypoint, "The Halo Wars Story Retold"
  15. ^ Halo Wars, campaign level Scarab
  16. ^ Halo Wars, campaign level Anders' Signal
  17. ^ Halo: Renegades, page 142-143
  18. ^ Halo: Smoke and Shadow
  19. ^ Halo: Renegades
  20. ^ Halo: Point of Light

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