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{{Era|Forerunner|HCW|Post}}
{{Status|Canon}}
{{Megastructure infobox
{{Megastructure infobox
|image=[[File:Halowars shieldworld official.jpg|300px]]
|image=[[File:HW TroveOrbit MattePainting.jpg|300px]]
|description=Hollow planetary shell with terrestrial inner and outer surfaces
|description=Hollow planetary shell with terrestrial inner and outer surfaces
|location=[[Korinth Prior system]], fourth major body, [[Milky Way|Cygnus Arm]]<ref>'''[[Halo: Warfleet]]''', p. 12</ref>
|location=[[Korinth Prior system]], fourth major body, [[Milky Way|Cygnus Arm]]{{Ref/Book|HWF|Page=12}}
|anchor=
|anchor=
|type=[[Shield world]]
|type=[[Shield world]]
|function=Fortress world and conservation facility
|function=Fortress world and conservation facility
|caretaker=[[Unidentified ancilla (Shield 0459)|Unidentified ancilla]]
|caretaker=[[295 Harken Watch]]{{Ref/Reuse|Enc22}}<br>[[Unidentified ancilla (Shield World 0459)|Unidentified ancilla]]
|constructed=During or before the [[Forerunner-Flood war]]
|constructed=During or before the [[Forerunner-Flood war]]
|destroyed=[[2531#February|February 25, 2531]]
|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 name="vis"/>
|diameter={{Convert|2875|km|mi|sp=us}}{{Ref/Reuse|vis}}
|surface width=
|surface width=
|gravity=0.998 G (approx)<ref name="vis"/>
|gravity=0.998 G (approx){{Ref/Reuse|vis}}
|surface temperature=10°C to 31°C (50°F to 87°F)<ref name="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 name="vis"/>
|atmosphere=1.05 ([[Wikipedia:Nitrogen|N<sub>2</sub>]], [[Oxygen|O<sub>2</sub>]], [[Argon|Ar]]){{Ref/Reuse|vis}}
}}
}}
The '''Etran Harborage''', also known as '''Trove''' as a loose translation of its original name, and formally designated as '''Shield World 0459''',<ref name="lootcrate4">'''[[Halo Legendary Crate]]''', ''[[Halo Legendary Crate/Data Drops|Data Drop #4]]''</ref> was a [[Forerunner]] [[shield world]] located in the [[Korinth Prior system]]. A conservation sphere,<ref name="vis">'''[[Halo: The Essential Visual Guide]]''', ''page 174''</ref> it was intended to protect sentient lifeforms from the effects of the [[Halo Array]] and the [[Flood]]. It also served as a military outpost housing the [[Apex Site]], a port for a fleet of {{Class|Sojourner|dreadnought}}s.<ref>''Halo Wars''</ref>
{{Quote|So...am I the only one freaked out by the fact that we're inside the planet?|[[Serina]]}}


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 name="Beachhead">'''Halo Wars''', campaign level ''[[Beachhead (Halo Wars level)|Beachhead]]''</ref><ref name="Reactor">'''Halo Wars''', campaign level ''[[Reactor]]''</ref><ref name="Escape">'''Halo Wars''', campaign level ''[[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}}


The Etran Harborage was discovered by the [[Covenant]] sometime prior to [[2531]]. It was subsequently destroyed at the end of a [[Battle of the Etran Harborage|battle]] in [[2531#February|February of that year]].<ref name="Escape" /> Though a debris field persisted until [[2557]], it was destroyed by a UNSC fleet following its discovery.<ref name="HRC24">'''[[Halo: Retributions]]''', ''Chapter 24''</ref>
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}}
 
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}}


==Overview==
==Overview==
[[File:ShieldWorld_matte_1.png|thumb|250px|The Etran Harborage's inner surface.]]
[[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.
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 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 could be seen on the surface, with chasms reaching deep down into the interior.
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, the Etran Harborage possessed a [[teleportation grid|translocation grid]] in form of a network of [[teleporter]]s.<ref name="Beachhead"/>
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 Etran Harborage 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>'''Halo Wars''', campaign level ''[[Shield World (level)|Shield World]]''</ref>
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}}


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>'''Halo Wars''', campaign level ''[[Cleansing]]''</ref> 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 name="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 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|Apex Site}}
{{Main|Apex Site}}
The Apex Site was an installation comprised of a control center on a platform high above the inner surface of the Etran Harborage, 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 name="Reactor"/>
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|''Spirit of Fire'' above the Etran Harborage's outer surface.]]
[[File:ShieldWorldOuterSurface.png|thumb|250px|''Spirit of Fire'' above Trove's outer surface.]]
===Construction===
===Forerunner-Flood War===
Etran Harborage 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.
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}}


At some point, suspected to be relatively recently as of the 26th century, the installation became heavily overrun by Flood.<ref name="lootcrate4"/>
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 birthplace for an invasion fleet beyond imagining!|Prophet of Regret}}
{{quote|This world shall be the birthplace for an invasion fleet beyond imagining!|Prophet of Regret}}


The Etran Harborage was discovered by the Covenant at some point before [[2531]], but then-current Covenant technology could not unlock its secrets. The [[Prophet of Regret]] sent [[Arbiter]] [[Ripa 'Moramee]] to the planet [[Harvest]] to investigate a [[Relic|Forerunner relic]] there that could have held the key.<ref name="OSG">'''[[Halo Wars: Official Strategy Guide]]''', ''page 50''</ref>
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 [[United Nations Space Command|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>
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|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 10th, captured Anders and brought her to the shield world. [[James Cutter|Captain James Cutter]], commanding officer of the UNSC ''Spirit of Fire'', to which Anders had been assigned, ordered immediate pursuit out-system.<ref>'''Halo Wars''', campaign level ''[[Scarab (level)|Scarab]]''</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.]]
[[File:ShieldWorldDestruction2.png|thumb|200px|Destruction of the shield world.]]
{{Main|Battle of the Etran Harborage}}
{{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 23rd. 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>'''Halo Wars''', campaign level ''[[Anders' Signal]]''</ref> A few hours later, the ''Spirit''<nowiki>'</nowiki>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]].
''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]].


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 name="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 Etran Harborage's [[Astroengineering#Stars|artificial sun]].<ref name="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.
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.


The destruction of Etran Harborage 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 name="Escape"/>
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}}


===Remnants===
===Remnants===
After hijacking the {{UNSCShip|Rubicon}} in [[2554]], [[343 Guilty Spark]] intended to take the ship to the Etran Harborage to get an [[upgrade seed]] 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 as Spark had been unable to connect with the [[ancilla]] of the shield world for some time, he was unaware that the planet had been destroyed.<ref>'''[[Halo: Retributions]]''', ''pages 142-143''</ref>
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 debris field that was left by the Etran Harborage'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>'''[[Into the Fire]]'''</ref> The crew was later forced to turn over what it had learned to [[ONI]] along with Little Bit.<ref>'''[[Halo: Renegades]]'''</ref>
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}}


{{Main|Mission to the Korinth Prior system}}
{{Main|Mission to the Korinth Prior system}}
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.
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.


At the same time, to complete his mission, 343 Guilty Spark brought the ''Ace of Spades'' back to the Etran Harborage 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 name="HRC24" />
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}}
{{Expand-section}}


==Trivia==
==Trivia==
{{Container|width=300px|style-tmp=float:right; clear:right; margin-left: 4px; padding: 1px; border-radius: .5em; -moz-border-radius: .5em; -webkit-border-radius: .5em; -ms-border-radius: .5em; -o-border-radius: .5em; background: #333333; font-family:Trebuchet MS, Tahoma, Verdana, Arial;|style-content=padding: 2px 0px 2px 0px;|title=<span style="font-size:11px;">Animation breakdown of Shield 0459's destruction</span>
{{#widget:Vimeo|id=5079411|width=300|height=170|thumb|caption=Animation breakdown of Trove's destruction}}
|{{#widget:Vimeo|id=5079411|width=300|height=170}}
*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.
}}
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.
{{clear}}


==Gallery==
==Gallery==
<gallery>
<gallery>
File:Shieldogram.png|A [[Holography|hologram]] of the Etran Harborage in ''[[Halo Wars]]''.
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.
File:HW_ShieldWorld_Portal_Concept.jpg|Concept art for the entrance to the shield world.
File:ShieldW_Surface_Closeup.png| The Flood-infested outer surface of the Etran Harborage.
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:ShieldWorld_tower_concepts.png|Concept art of the Apex Site's docking towers on the inner surface.
File:HM-Cutter&Serina.png|Trove in ''[[Halo Mythos]]''.
File:HM-Cutter&Serina.png|The Etran Harborage in ''[[Halo Mythos]]''.
File:LC 004 Taurokado.png|The {{UNSCShip|Taurokado}} traversing the shield world's debris field in [[2557]].
File:LC 004 Taurokado.png|The {{UNSCShip|Taurokado}} traversing the shield world's debris field in [[2557]].
</gallery>
</gallery>
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*''[[Halo Wars 2]]'' {{Mo}}
*''[[Halo Wars 2]]'' {{Mo}}
*''[[Halo: Renegades]]'' {{c|Fragments only}}
*''[[Halo: Renegades]]'' {{c|Fragments only}}
*''[[Halo: Point of Light]]'' {{Mo}}
*''[[Halo: Fireside]]'' {{Mo}}


==Sources==
==Sources==
<references/>
{{Ref/Sources}}


{{Forerunner|array}}
{{Forerunner|array}}
[[Category:Forerunner installations]]
[[Category:Shield worlds]]

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

v • d • e
 
The Forerunners

v • d • e
 
Halo Array
Arks
Senescent array
Gyre 01 • Gyre 02 • Gyre 03 • Gyre 04 • Gyre 05 • Gyre 06 • Gyre 07 • Gyre 08 • Gyre 09 • Gyre 10 • Gyre 11 • Gyre 12
Neoteric array
Other

v • d • e
 
Installation components

v • d • e
 
Other installations
Other megastructures
Other facilities
For a complete list, check out our Forerunner category.
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