Human Sphere



The Human Sphere is the collection of worlds, habitats and regions of space governed and inhabited predominantly or entirely by humans. It encompasses SolCore, the Inner and Outer Colonies, as well as various informal settlements. As of 2520, 809 discrete colony sites were catalogued by the United Earth Government as being at various stages of development. These included everything from minor mining outposts to full-fledged colony worlds or habitats.

An estimated 3/4ths of human colonies were glassed by the Covenant during the Human-Covenant War to the point they could not be recovered or resettled in the immediate future. Out of these, only a small number were glassed to the point of total biosphere destruction, with these usually being important centers of population, industry and military might. Still, most colonies targeted by glassing operations had their population centers destroyed, and usually suffered many of the secondary effects of glassing, including rampant wildfires, residual radiation as well as smoke and ash thrown into the atmosphere. These issues, coupled with the costs of reconstruction, mean that the resettlement of most colonies may take decades, even well over a century. Since the war, the UNSC and the Phoenix Initiative prioritized the re-development of select strategically important worlds, along with the establishment of new colonies, which has at times proven more viable than the reconstruction of glassed worlds.

Inner and Outer Colonies
The Inner and Outer Colonies are the two major categories of human extrasolar colonies, historically divided less by distance and more by politics. Still, most of the Inner Colonies were located within a 30-lightyear radius of Sol. Conventionally, the 2390 revision of the UN Colonial Charter, which opened up colonization for a much wider array of actors along with various political reforms is held to be the watershed dividing the Inner and Outer Colonies, with any colonies established since being classified as Outer Colonies. Exceptions to this occur, however, and some colonies founded since have become understood as part of the Inner Colonies' exclusive "club". The Inner Colonies are commonly seen as the most developed human worlds as well as those most closely tied to SolCore, though this too has many exceptions and caveats. Many Inner Colonies have ambitions of their own, and their lack of overt conflict with Sol over the last two centuries has much to do with their better economic status and negotiating position with the United Earth Government. While many of the Inner Colonies house high-end industry, the Outer Colonies have historically been where most of the resources for that industry have been acquired, along with the production of foodstuffs to feed Sol and the Inner Colonies on agricultural colonies, often founded on fertile worlds that receive abundant sunlight. Since the Human-Covenant War, all human systems have had to diversify their industries in order to survive and feed their populations, as the elaborate resource-extraction chains managed by the UEG's institutions have broken down.

Astrography
Astrographically, most of the Human Sphere is based within the Local Bubble, a relative cavity in the Solar Region or Gould Belt region of the Orion Arm of the Milky Way galaxy. Before the Human-Covenant War, this sphere of influence reached no further than 150 lightyears at its greatest extent, though probes and exploratory missions had been launched as far as twice that distance.

Human space, and technically the entire galaxy, is conventionally divided into four quadrants centered on the Sol system. These quadrants are then further divided into radial sectors likewise centered on Sol. In the FLEETCOM astrographic system, quadrants are instead called sectors and are subdivided into subsectors. The sector system has been criticized and is not universally agreed upon, especially as its utility grows increasingly limited the further one goes from Sol.

Locations
In the following listing,
 * Colonies that survived the war or have been established since the war have their names marked in bold.
 * Colonies that suffered attacks and/or minor damage, including localized glassing, but survived or could be recolonized with minor reclamation efforts are in bold italic.
 * Colonies that were glassed or have been otherwise devastated and will likely remain inhospitable and/or largely uninhabited for a century or more are in italic. Some glassed worlds have become long-term "deglassing" operations, often involving long-term reterraforming and silicate mining on the side. This also includes worlds that may be recoverable sooner but have not been prioritized by formal reclamation programs for various reasons, including distance, other logistical issues, or instability in their region of space.
 * Worlds and sites that do not fit any of the above categories, or whose status is unclear and/or unexplored, are in plain text. This also includes worlds that are not human colonies, such as Covenant outposts located in or near human territory.

Sectors are listed in clockwise order and grouped by row, based on their distance from Sol.

SolCore

 * Sol system - Home system of humanity.
 * Earth
 * Mars
 * Jovian Moons


 * Alpha Centauri system
 * Ammon - Small industrial world. Now largely devastated.
 * Proxima - The planet Proxima hosts numerous settlement groups, and each one has as good a claim to settlement as the other. Some are fiercely pro-UNSC and others are just as fiercely pro-independence. Votes on whether to leave or remain are inconclusive, and generally depend on which group is left alone with the ballot boxes. At best anyone can determine, the percentage of the population that wants to leave is probably over fifty percent. Has a population under 100 million.

Orion-Eridanus Quadrant / FLEETCOM Sector 1
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Galileo Sector

 * Ross 128 system - connected via slipway to the Sirius system.


 * Sirius system - connected via slipways to the Ross 128 and Epsilon Eridani systems.
 * Kaulua Spindle - Space habitat used as a local hub of local mining, scientific operations and minor industry. Has a population under 10 million by 2565.


 * Procyon system - a waystation system connected via slipways to Epsilon Eridani and Gliese 588.


 * Asimov / 82 Eridani system - connected via slipways to the Epsilon Eridani and Anu systems.
 * Andesia - A wealthy colony headed by a corporate council. Has a population under 1 billion.

Kepler Sector

 * Epsilon Eridani system - hub system outside Sol. Connected via slipways to Sol, Sirius, Procyon, Sigma Octanus, Asimov, Anu, Gliese 86, Gliese 185, 61 Ursae Majoris, Tabit, Gliese 176, Tau Ceti, Sigma Draconis, and UV Ceti.
 * Beta Gabriel - an Europa-like ice world with a subsurface ocean, Beta Gabriel has little permanent population to speak of, aside from marine laboratories and research outposts, and was thus spared most of the Covenant's attentions in the Epsilon Eridani invasion.
 * Circumstance (Epsilon Eridani IV) - a waterworld with several seastead-cities and aquatic farms; founded as a lesser agri-world to feed Reach and Tribute, but later became quite prestigious as a center of law and culture. Attacked and abandoned during the Fall of Reach, but quickly recolonised.
 * Reach - Deemed recoverable only within a span of centuries, the UNSC's crown jewel is now a mass grave. In the immediate post-war years, small communities of Covenant stragglers remained in its orbit and groundside facilities, and hundreds of salvagers pick apart the orbital debris field, including the husk of a refueling and refit platform left unfinished as the Covenant pushed on to Sol and eventually the Ark. Still, securing Reach's orbital space will be a priority project for the UNSC following the war, as the system continues to be a major slipstream node and Sol's gateway to the greater galaxy.
 * Tribute (Epsilon Eridani III) - a mainly industrial colony and Epsilon Eridani's lesser population center, Tribute was spared the brunt of the Covenant invasion as the Covenant focused all their might on Reach. Still, most of the planet's cities and industries were glassed, though a number of smaller settlements survive, and the glassing was not widespread enough to destroy the planet's ecosystem and climate. Post-war, it has become Epsilon Eridani's most notable resettlement project, with hundreds of thousands of refugees flowing in from across the Human Sphere.


 * Teegarden's Star / Teegarden system

Newton Sector

 * 61 Virginis system - connected via slipways to Sirius, Gliese 433, and Beta Virginis.
 * Miridem - an Inner Colony glassed in 2544. Large cities included Antioch, Cyrene and Syracuse. Most of the initial settlers were Martian, though there was considerable immigration from across Sol in the colony's early decades. Widely-spoken languages included Novala and French, though there was notable variety among the major cities. The planet used to be something of a hotspot of telecommunications and cybersecurity technology in its neighborhood of space.


 * Beta Virginis system - connected via slipways to 61 Virginis and I Carinae.
 * Roston - an industrial world that supplied the war effort in Sectors 2 and 1, before its glassing in the late 2530s.


 * Gliese 433 system - connected via slipways to Niven and 61 Virginis


 * HD 40307 system


 * Zeta Doradus system
 * Onyx - secret training and research world for ONI, later discovered to be a Forerunner Shield World. Planet dissolved into an enormous swarm of Sentinels which now surround its inaccessible core.

Hubble Sector

 * Anu system (p Eridani) - connected via slipways to Asimov, Epsilon Eridani, and Gamma Leporis.
 * Gilgamesh - a famed tourist destination and tax haven with a blooming illicit technology sector.


 * Bosporus system (58 Eridani) - connected via the Eridanus Spine to Gliese 185 and Acropolis, and another slipway to Chi Eridani.
 * New Constantinople - a fairly prominent population center at the often-ill-defined border between the Inner and Outer Colonies, first settled by Eastern Orthodox colonists. Later a waystation between the Inner Colonies and the Orion-side Outer Colonies. Served as an industrial center. Site of a battle in early 2537, which saw participation by the Spartan-IIIs of Alpha Company. May or may not have been invaded more than once. Vice Admiral Whitcomb was also famed for his accomplishments in a battle there, but it was most likely glassed either in 2537 or a later date. Recovered after the war to some extent.


 * Eta Leporis system - waystation system connecting Gamma Leporis and Fairfax.


 * Gliese 86 system - connected via the New Eridanus route to Epsilon Eridani and Chi Eridani.


 * Gliese 185 system - connected via the Eridanus Spine to Epsilon Eridani and Bosporus.
 * Verne - a high-oxygen jungle-world mostly covered in an impenetrable tangle of plant life and hostile fauna, Verne was home to several dozen arcologies rising above the jungle canopy, most of which now lay in ruins. However, the ecosystem remains intact, and the planet is now home to numerous unsanctioned independent settlements within and above the canopy. Has a population under 10 million.


 * Hawking system (Gliese 250/HD 50281) - connected to Asimov via slipway.
 * Camber - Attacked and glassed by Thel 'Vadamee. Was an industrial center, with a population of 5.4 million.


 * Rana / Delta Eridani system - connnected to Tabit via slipway.
 * Lagos

Gemini Sector

 * 61 Ursae Majoris system - connected via slipways to Epsilon Eridani, Bilani, Theta Ursae Majoris, and Leonis Minoris.
 * Ruthersburg - a small mining world that is now molten thanks to Covenant bombardment. Undergoing expansion as it is discovered to be part of the newly-opened Eridanus Route Slipway. Has a population of under 10 million.


 * Bilani system (HR5256) - connected via slipways to Groombridge 1830 and 61 Ursae Majoris.
 * Minab - Former agri-world. Attacked and glassed in 2550.


 * Chalawan / 47 Ursae Majoris system - connected via slipways to 61 Ursae Majoris, Sarona and Leonis Minoris.
 * Sargasso - A resort world, attacked in 2546.


 * Pollux system


 * Tabit system (π3 Orionis) - connected via slipways to Epsilon Eridani and Rana.
 * Heavensward


 * Theta Ursae Majoris system - connected via slipways to 61 Ursae Majoris and Anaria.
 * Juneou - Agri-world that has substantially expanded its agricultural operations in the post-war era. Has a population under 100 million.

Yellowstone Sector

 * Beta Pictoris system - connected via slipway to Gliese 163.


 * Gamma Doradus system - connected via slipways to HD 53143 and Zeta Reticuli.
 * Far-Gone Colony Platforms - one of the locations defended by SPARTAN-III Alpha Company. Had a population under 10 million by 2565.

Enuma Sector
A largely uninhabited sector located in between the major slipways of the Eridanus and Dorado expansion regions.


 * Soell / Iota Horologii system
 * Threshold - gas giant housing various Forerunner stations in its atmosphere.
 * Halo Installation 04 debris field
 * Basis

Typhon Sector

 * Fairfax system - connected via slipway to Eta Leporis.
 * Fairfax II - former industrial center.

Mirata Sector

 * 71 Orionis system - connected via slipways to Delta Geminorum, Acropolis and 13 Orionis.
 * Gaia


 * Acropolis system - connected via slipways to Bosporus, Beta Eridani, Eridanus, and 71 Orionis.
 * Eirene - Attacked some time prior to 2537.


 * Chi Eridani system - connected via the New Eridanus Route to Gliese 186 and 68 Eridani, as well as other slipways to Bosporus and Dagmar's Star.
 * Norton's Crossing - Norton’s Crossing is a colony with an ugly and bloody history. More battles were fought there during the Insurrection wars than any two other colonies combined. Battles were fought between the UNSC and paramilitary groups, between the paramilitary groups and the colonial government, and between the paramilitary groups and other paramilitary groups that dared to fight for the wrong revolution. Something about the planet drew in violent idealogues from light-years around. Norton’s Crossing recently voted 62% to leave the UNSC. According to exit polls, the majority of the population hopes that the violence will die down if the UNSC removes its presence from the colony. However, sources within the colonial government warn the UEG that the only thing keeping them afloat is the UNSC troops patrolling the cities and countryside. Without that aid, they will likely fall to the same rebels who took Elysium City several decades ago. Has a population under 100 million by 2565.


 * Dagmar's Star system - connected via slipways to Chi Eridani, August and Delta Geminorum.
 * Carrow - former agri-world. Evacuated during the war, but was either never attacked or was bypassed by the Covenant due to the absence of colonists. Settled by a group of ex-Covenant in the immediate aftermath of the war. Has a population under 10 million.

Anatoli Sector

 * Delta Geminorum system - used as a staging area by the Covenant in the final years of the war. Connected via slipways to Dagmar's Star, 71 Orionis and 22 Lyncis.


 * Sarona system - connected via slipways to Chalawan and Weinland.
 * Kholo - Invaded and glassed by the Covenant during the war.

Galian Sector

 * 22 Lyncis system - former Covenant invasion route waystation system along the Delta Geminorum-Sigma Ceti corridor.


 * Leonis Minoris system (15 Leonis Minoris) - has a combined population of under 10 million by 2565. Connected via slipways to 61 Ursae Majoris and Chalawan.
 * Demeter - An agri-world glassed in the Covenant War.
 * Herschel - The system's primary mining & industrial center; glassed during the war, but may be recoverable in the near future.
 * Sahara - A largely desertified world housing a lesser colony that survived the war with far less damage than its neighbors due to its low population.

Eridanus Sector

 * 51 Eridani system - connected via slipway to Eridanus.
 * Taras - a small, rugged mining colony. Used as a base by the Secessionist Union and later elements of the United Liberation Front. Glassed shortly after Eridanus II.


 * Terrel / 68 Eridani system - connected via slipways to Chi Eridani and Eridanus.
 * Mamore - intensely-rebellious colony, has a population under 100 million.


 * Beta Eridani system - connected via slipway to Acropolis.


 * Eridanus system (HD13808) - in addition to the agricultural produce of Eridanus II, the system housed some local industries and mining operations. Connected via the Eridanus Spine to Bosporus and Kozani, and by other routes to 51 Eridani, Terrel and Icarius.
 * Eridanus II - rural agriworld with minor industries across the system. Despite its remoteness, it had a relatively high level of development and standard of living for much of its population. Despite this, it has historically had strong Insurrectionist ties, serving as a regional center of Insurrectionist operations. Glassed in 2530. Has an estimated population of 510,000 after the war.
 * Eridanus Asteroid Belt - housed various mining facilities and even a small shipyard. Many of these facilities were automated, though a handful also hosted human habitats. Some of these served as hideouts for rebels after they were driven off Eridanus II.
 * Eridanus Secundus - Insurrectionist/independent asteroid habitat. Survived the attack on Eridanus II in 2530, but was presumably destroyed by the Covenant in 2552.
 * Station Jefferson - destroyed/disabled by Blue Team prior to 2530.

Coeus Sector

 * 13 Orionis system - connected via slipways to Icarius, Tianxia, Padavona and 71 Orionis.
 * New Harmony - one of the few places the UNSC won a naval battle, which led to the discovery of K7-49 shipyards. Later glassed. Industrial center.


 * August system - connected via slipways to Icarius and Dagmar's Star.
 * August II - home to Insurrectionists that occupy the nearby asteroid belt, which was attacked by the Covenant and led to the discovery of several nearby worlds.


 * Icarius system - connected via slipways to Eridanus, 13 Orionis, and August.
 * Fractus Asteroid Belt

Oceanus Sector

 * Anaria / 23 Ursae Majoris system - connected via slipway to Theta Ursae Majoris.
 * Nova Odessa


 * Weinland system - connected via slipways to Sarona and Zumthor.
 * Rampart - Former military center.

Heliades Sector

 * Zumthor system - connected via slipway to Weinland, and by a former Covenant invasion corridor to Sigma Ceti.
 * Nestor's Landing

Mitanni Sector

 * Meshkat / 86 G. Eridani system - connected via slipway to Kozani and by the Covenant's Eridanus Ingress Corridor to Phi Eridani.
 * Dwarka - Former minor agri-world. Glassed soon after the Human-Covenant War began, home to some sort of Insurrectionist cell.


 * Kozani system - connected via slipways to Eridanus, Meshkat and Tianxia.
 * Tiberias

Hadrian Sector

 * Padavona system - connected via slipways to 13 Orionis and Thebes Prime.
 * Blessing


 * Thebes / Thebes Prime system - connected via slipway to Padavona.
 * Henkries


 * Tianxia / Phi2 Orionis system - connected via slipways to 13 Orionis and Kozani, as well as a Covenant invasion corridor to EC 4-2911.
 * Shenzen

Acheron Sector

 * EC 4-2911 system
 * K7-49 - an asteroid used by the Covenant as a forward shipyard during the war; facility destroyed by Spartan-III Alpha Company in 2537. Now abandoned.

Miura Sector
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Dorado-Scorpius Quadrant / FLEETCOM Sector 2
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Cronus Sector

 * Palache / Gliese 667 system - connected via slipway to 70 Ophiuchi.
 * Asphodel - has a population under 100 million.


 * Delta Pavonis system - connected via the Core Trunk to Sol, by the Murano Route to Mu Arae, by the Primary Libra Route to 18 Scorpii, and by other slipways to Gamma Pavonis, Ectanus 45, and Yaytsa.
 * New Carthage - Primary colony world of the Delta Pavonis system and the largest surviving Inner Colony by population. Urbanized, focused on specialized industries and formerly reliant on Outer Colony produce, though the crisis brought on by the Covenant War forced the populace to convert large swathes of the planet's wilderness into farmland or refugee settlements. Has seen massive population growth since 2525 due to steady refugee streams from the Outer Colonies of Quadrant 2. Formerly one of the most stable Inner Colonies, the challenges brought on by the war have put considerable strain on the local government, even as the planet remains unscathed by Covenant attack. Has a population approaching one billion as of 2565.
 * Aphelion - A lesser colony world in the Delta Pavonis system.


 * Epsilon Indi system - a mostly uninhabited system due to the lack of habitable worlds or major resources worth exporting. Connected via slipway to Alpha Centauri.

Sagan Sector

 * Beta Hydri system - connected via slipway to Sigma Octanus.
 * Beta Hydri VI - Inner Colony attacked at some point after 2533. Was not a major world, though had a decently sizable population. Was not fully glassed and was scheduled for reclamation under the Phoenix Initiative.


 * Gliese 588 system - connected via slipways to Alpha Centauri, Niven and Procyon.


 * Kapteyn's Star / Kapteyn system - connected via slipways to Sol and Zeta Reticuli.


 * Lacaille 9352 system

Malabar Sector

 * 18 Scorpii system - connected via the Scorpius Cross to Kashmir and Delta Pavonis, and by the Primary Libra Route to 23 Librae.
 * Falaknuma - held only a small naval base, was the location where the Rubble's Habitat Exodus arrived.


 * Ectanus 45 system - connected via slipways to Charybdis IX, Yaytsa, and Delta Pavonis.
 * Chi Rho - Military and industrial center. Host to Vice Admiral Jean Mawikizi's last stand.


 * Gamma Pavonis system - connected via slipways to Iota Pavonis and Delta Pavonis.
 * Ningbo


 * Hesperia system (HD147513) - connected via slipways to Scorpius and Guniibuu.
 * Coral - the fifth planet in its system, has a famously large Forerunner structure on its system (possibly the first the human public were aware of).


 * Mu Arae system - home to a planetary system named after characters in Don Quixote. Connected via the Murano Route to Delta Pavonis and by forks to Erebus and Agathos.
 * Port Eliza - an orbital asteroid-habitat with a population under 10 million. Orbits the gas giant Rocinante.


 * Scorpius system (HD 147513) - connected via slipway to Hesperia.
 * Ample Pastures - Agri-world.

Galari Sector

 * Yaytsa / Beta Trianguli Australis system - connected via Apell's Trace to Delta Pavonis and Eta Crucis, and by other slipways to ECtanus 45, Alpha Circini and Sigma Octanus.
 * Siberia Prime - A frigid industrial world famed for its past civil wars.
 * Siberia Secundus - A secondary world of little importance.
 * Sudarski - a gas giant mined for helium-3 and hydrogen for local use.

Asteria Sector

 * Alpha Corvi system - connected via slipways to Eta Corvi and Niven.
 * Hollow Point - One of the last Outer Colonies hit before the Inner Colonies were attacked.


 * Alpha Mensae system - connected via slipway to Sigma Octanus.
 * Lodestone


 * Niven System (HD 102365) - connected via slipways to Gliese 588 and Alpha Corvi.
 * Minister - an obscure, rugged Inner Colony located far away from major trade centers, Minister was an underdeveloped world with few exports and high emigration rate. Its sole call-to-fame was that the UNSC repurposed it as an overcrowded refugee world during the Human-Covenant War. Has a population under 100 million.


 * Sigma Octanus system - connected via slipways to Epsilon Eridani, Beta Hydri, Yaytsa and Alpha Mensae.
 * Sigma Octanus IV - has a population under 10 million. Attacked in July 2552 in a rare UNSC victory, though the colony was temporarily evacuated and never attacked again as the Covenant subsequently focused their attentions on Reach. However, the damage the colony suffered during the battle as well as the orbital debris field took years to clean up.


 * Zeta Reticuli system - connected via slipways to Sol, HD 65907, Gamma Doradus and Gliese 163.
 * Roswell - A relatively small Inner Colony with some fringe interest as to purported alien ruins there. Debate persists as to whether said ruins are genuine or fabricated by the early settlers.

Prana Sector

 * Agathos system - connected via slipway to Mu Arae.
 * Eudemon


 * Erebus system - connected via slipway to Mu Arae.
 * Erebus VII

Dolinar Sector

 * Charybdis system - connected via slipways to Ectanus 45 and 23 Librae.
 * Charybdis IX - Corporate-run mining colony, glassed in 2535. Had some importance to the war effort in its sector (industrial center).


 * Epsilon Scorpii system - connected via the Scorpius Cross to 18 Scorpii.
 * Kashmir - Has a population under 100 million.


 * Iota Pavonis system - waystation between Gamma Pavonis and Brunel.

Camina Sector

 * Alpha Circini system - connected to Nu2 Lupi, Yaysa and Athos via sliplane.


 * Eta Crucis system - waystation between Yaytsa and Peloponnesus along Apell's Trace; connected to Circinius via slipway.

Dhawan Sector

 * Eta Corvi system - connected via slipways to Alpha Corvi, Hydra, Dana and Algorab.
 * Kingston - former CMA base world.


 * Hydra system (297 G. Hya) - setting for the Hydra System Massacres, in which the system's two major colonies engaged in a bloody war with one another followed by a messy UNSC intervention. Located 58LY from Sol. Connected to Eta Corvi via slipway.
 * Bomogin
 * Samarkand


 * Shanti system - connected via slipway to Alpha Corvi.
 * Indra Asteroid Cluster - Home to raw materials extraction operations as well as shipyards.

Harmon Sector

 * AK Pictoris system
 * New Darmstadt - small waystation colony that survived the war with minor damage.


 * HD 53143 system
 * Deep-Space Anomaly #0198 - an anomaly logged originally by probes and later discovered to be a Forerunner listening post possibly related to the nearby Halo Installation 04.


 * Bellbrook system (HD 65907) - connected via slipways to Zeta Reticuli and AK Pictoris.
 * Partition - undetected for centuries prior to the end of the Human-Covenant War despite being near the major slipways to the Armstrong Expanse. Crash site of the ammunition ship UNSC Diadochi.


 * I Carinae system - slipspace waystation between Beta Virginis and AK Pictoris.

Austero Sector

 * Messino system - a system charted by frontier independents from Isbanola; waystation of the Navarro Spur and starting point of Halliday's Bypass; connected to the Marisova, Brunel and Dinni systems.

Marani Sector

 * 16 Librae system
 * New Tharsis - Named as such for its vast volcanic plateaus similar to Mars' Tharsis. Hab rating IV. Industrial center.


 * 23 Librae system
 * Madrigal - an Outer Colony in the 23 Librae system glassed in 2528.
 * The Rubble - an asteroid settlement built by the survivors from Madrigal in the trailing trojans of the gas giant Hesiod in the 23 Librae system, with the assistance of ostensibly independent Kig-Yar traders. Destroyed in 2535.


 * Brunel system
 * New Llanelli - Small agriworld glassed in 2546.

Gasparo Sector

 * Athos system - connected to Alpha Circini, Delta Muscae, and Bayard via slipways.
 * Passage


 * Circinius / Beta Circini system - 97LY from Sol.
 * Circinius IV - UNSC base world home to the Corbulo Academy of Military Science.


 * Delta Muscae system - connected via slipway to the Athos system.


 * Morgenstern system
 * Freiberg


 * Peloponnesus system (HD 219077) - connected via slipway to the Eta Crucis.
 * Arcadia - initially invaded in 2531 and glassed in 2547, Arcadia now has little relevance. Salvagers, pirates and various peripheral elements of the Covenant meta-civilization have been active in the system as well as its immediate neighborhood after the war, and may use Arcadia or some of the other planets and planetoids in the system as hideouts.

Merida Sector

 * 88 G Centauri system


 * 120 G Centauri system


 * Bayard system
 * Cote d'Azure - one of the first 8 colonies attacked by the Covenant, during the first four years of the conflict.

Rawadi Sector

 * Algorab - connected via sliplane to Eta Corvi.


 * Dana / Iota Crateris system - connected via slipways to Surya, Eta Corvi, and Ubazi.
 * Hat Yai - Known for its tropical qualities, glassed in 2528 or 2529.


 * Marduk - a black hole and a navigational hazard.


 * Ubazi system - connected via slipway to Dana.
 * Cadence

Eforo Sector

 * Caspian system - connected via slipway to Escurial.
 * Bohemia


 * Escurial system (HD 77370) - connected via slipways to AK Pictoris and Caspian.
 * Boundary

Delbara Sector

 * Dinni system - waystation along Halliday's Bypass between the Federley and Messino systems.

Mauro Sector

 * Epsilon Librae system - connected via slipway to 16 Librae.
 * Nimbus Platform - A colony-habitat founded around a local industrial and scientific operation.


 * Pasana system - waystation along the Pasana Slip between Brunel and Federley.
 * Gaer's World - Independent human colony, has a population under 10 million.

Polona Sector

 * Emiw system
 * Emiw VII - formerly home to a Covenant forward-operations base.


 * Ephyra system
 * Netherop - an unoccupied world home to the ruins of a long-vanished planetary alien culture.


 * Igdras system - connected via slipway to Elah.
 * Etalan - also known as E'gini to the Covenant, most of Etalan's colonists had embraced a nomadic lifestyle and large urban communities were few.


 * Kolaqoa system - connected via slipways to Circinius, Redstow, Qusdar, and Elah systems.
 * Biko - also known as Borodan to the Covenant, has four satellites including Seoba.


 * Qusdar system - connected via slipways to Kolaqoa, Aksum, and Polybius systems.
 * Mesra - An Outer Colony founded around a single religious community.


 * Redstow system - connected via slipway to Kolaqoa.
 * Redstow VI - a base of operations for the Galodew Emancipation, a large Insurrectionist cell, glassed by 2526.

Aureo Sector

 * Atreus system - connected via slipways to Salvatori and Glint.
 * Midvale - The prime breadbasket world for its entire sector, attacked during what would later be known as the 'Week of Slaughter.'


 * Glint system - connected via slipways to Atreus and Dana.
 * Nuevo Cuzco


 * Pi Hydrae system
 * Pi Hydrae II - formerly home to a Covenant fuel depot and mustering base.

Lurone Sector

 * Gamma Mensae system - connected via slipway to Algorab.
 * Campbell's Landing - located in a navigational hazard-zone known as the Scab, with all colonists living in a 'habitat hotspot' around a single resource-rich world. Had a strong Insurrectionist presence due to its remoteness.


 * Surya system - connected via slipways to Dana and via a Covenant invasion corridor to Einjel.
 * Jagati

Rowena Sector

 * Beta Volantis system
 * Yihsin - home to a former Covenant mining operation and outpost.


 * Helos system - connected via slipways to AK Pictoris and Mandell.
 * Helos Secundus - Minor military center.


 * Mandell system - connected via slipway to Helos.
 * Pumice - A volcanic world formerly home to a minor industrial colony.

Vevina Sector
Was the first sector hit by the Covenant.


 * Federley system (HD 86226) - 139 lightyears from Sol. Connected via the Pasana Slip to Pasana, by Halliday's Bypass to Dinni, and by other slipways to BS Indi and Gibson. After the war, the Tempest Crossing route connectes the system to Vashuak and all the way to the ex-Covenant sphere.
 * Second Base - one of first two colonies to be glassed after Harvest.


 * Indus / BS Indi system - connected via slipways to 23 Librae and Federley.
 * Harvest - first casualty of the Covenant, was subjected to intense fighting as the UNSC attempted to hold it.

Grenadi Sector

 * Aksum system - connected via slipway to Qusdar.
 * Asmara - one of the first eight colonies destroyed by the Covenant.


 * Elah system - connected via slipways to Igdras and
 * Amasa - also known as Alay'oso to the Covenant, destroyed by Fleetmaster Nizat 'Kvarosee.


 * Gibson system - connected via slipway to
 * Green Hills - mining colony with a huge BXR influence, one of the first colonies hit after Harvest.


 * Polybius system - connected via slipway to
 * Bliss - one of the first Outer Colonies to be glassed in 2526. Home to a silicate mining operation after the war.

Columbo Sector

 * Salvatori system
 * Viridian

Radha Sector

 * Einjel system
 * Einjel V - formerly home to a Covenant forward base and garrison.

Kali Sector

 * Beta Corvi system
 * Gialatan - formerly home to a Covenant fuel mining operation.

Anomi Sector

 * Beta Gruis

Upada Sector

 * Idal'wun system
 * Narske

Aruna Sector

 * Vashuak system
 * Raashor


 * Aduna system
 * Nepharal - gas giant home to the Rings of Nepharal, which housed a Covenant forward base before Operation: HIGH TIDE.

Garuda Sector
}}

Sagittarius-Cygnus Quadrant / FLEETCOM Sector 3
{{Col-2

Athena Sector

 * 61 Cygni system
 * Sunburn - A hot desert world colonized for its rich deposits of rare metals. Has a population of 10 million or fewer by 2565. Still an industrial center.


 * Alpha Lyrae / Vega system
 * Atlas Moons - a colony cluster centered on the moons and orbital facilities the gas giant Atlas, housing industry critical to the war effort. Most of the moons were named after the mythological Hesperides. The moons were the site of a prolonged siege in 2547-2548 in which Admiral Whitcomb participated. Shared their system with the lesser colony of Vega. The moons were largely abandoned during the siege, but the relatively intact status of many of the colonies and facilities had them marked for resettlement after the Human-Covenant War. Remains a military and industrial center.
 * Hesperia
 * Thetis
 * Asterope
 * Antheia
 * Vega - minor mining colony that shared its system with the Atlas Moons and the gas giant Atlas.


 * Aneirin system
 * Criterion
 * Imber


 * Hellespont system
 * Troy and Harmony - sacrificed to prevent the Covenant from discovering their encryption had been cracked, although some warning was afforded to sensitive ONI and UNSC assets.


 * Petrova system
 * Skopje - Glassed by the Covenant in 2547 after a battle.

Tethys Sector

 * 70 Ophiuchi system
 * Ballast - a fairly prominent Inner Colony. Has a population under 1 billion.


 * Guniibuu / 36 Ophiuchi system
 * Cascade - fairly populous Inner Colony. While first settled in the late 24th century, its terraforming to its current state took over a century. Cascade experienced an economic boom in the post-war era due to the growth of key industries there resulting from the loss of so many other industrial centers. Has a population in the low hundreds of millions.


 * Mathani / 12 Ophiuchi system
 * Emerald Cove - a fairly notable Inner Colony famed for its tropical archipelagos, Emerald Cove was abandoned in 2542 due to a threat of Covenant invasion. The Covenant established an outpost on the world in the late 2540s, but the planet was never glassed; since the war, Emerald Cove has attracted several Covenant stragglers, but due to its intact state it was prioritized for reclamation and resettlement by the UNSC and retaken shortly after the war. Has a population under ten million.

Minerva Sector

 * Chandrasekhar system (HR 9038)
 * Parvati - an Inner Colony world with most human habitation concentrated on a series of canyon systems and caverns due to the inhospitable weather conditions on the desert plains that covered most of the planet; a further terraforming and climate-control project was ongoing, but would still have taken over a century to take effect. Settlers hailed primarily from Earth's South and Southeast Asia, and generally tend to have stocky builds due to the planet's higher-than-standard gravity. While only the human settlements were glassed in 2543, this destabilized what little artificial ecosystem Parvati had, making short-term resettlement unlikely beyond domed habitats.


 * Gamma Cephei system
 * Mesa - glassed during the Covenant War by the Fleet of Particular Justice.


 * Upsilon Andromedae system
 * New Holland

Heraklion Sector

 * 72 Herculis system
 * Ariel - a barren world home to a research outpost; while invaded, it was never glassed, and may become more prominent as a climate-modification and settlement project in the post-war era. Has a population under 100 million.


 * Alcides / Zeta Herculis system
 * Neos Atlantis - the UNSC's primary naval yard for the immediate future following the loss of Reach and Mars' industry. Industrial and military center. Has a population under 100 million.


 * Beta Comae Berenices system
 * Fjord - suffered a minor Covenant attack which destabilized the already struggling local government, precipitating a full CAA takeover in the post-war era, one that was welcomed by most of the locals after decades of incompetent administrations from the world's two opposing political factions. Fjord's home star has assumed some strategic importance as a waystation system in the post-war era. Has a population under 1 billion by 2565. Was already an industrial center, became a military center in the later years of the war.


 * Mu Herculis system
 * Forseti


 * Paris system
 * Paris IV - conquered by the Covenant in a protracted siege. The site of a major defensive line in its region.

Attican Sector

 * Beta Aquilae system
 * Lenapi - has a population under 100 million.


 * Gaelic system (Beta Canum Venaticorum)
 * Falkirk and Sgothein - two Scottish colonies of the Gaelic system, these worlds were notable for being Inner Colonies that were disillusioned from the UEG and UNSC due to the invasions of the Inner Colony Wars, which devastated their economy and industrial base. While Falkirk was terraformed, Sgothein only received basic atmospheric remixing due to its status as a mining world. Their populations have a strongly patriotic, slightly isolationist culture, with a particular hatred of interstellar corporations. Both colonies were badly glassed in mid-2551.
 * Ffyniannus - the sole reclaimable colony of the Gaelic system, Ffyniannus was a cooler, more temperate world that shared Falkirk's misgivings with the UEG. Although its sibling worlds were hit hard by the Covenant, Ffyniannus managed to evade their attention long enough for a large-scale evacuation to be completed.


 * Gliese 673 system
 * Manus - Manus was a skipover. It was a planet with only marginal resources, and therefore was ignored during the outward migrations from Earth. It found use as a dumping ground for refugees at the beginning of the war, and a stable population was established over the years. At the end of the war, the Manus colonial assembly passes a vote 170-88 to leave the UNSC, which was affirmed by 67% of the population. The population of Manus isn't ideologically pro-independence. Instead, there is a widespread hostility towards paying taxes to the UNSC for defense. The theory goes is that Manus is deep enough in UNSC territory that it shouldn’t have to worry about attack from outside threats. Worse than that, the colonial government of Manus plans to bring in investment capital from UNSC worlds by turning Manus into a tax haven. The UEGDR estimates that by taking advantage of the same agreements that other independent colonies have made with the UNSC, Manus will drain enough revenue from the UNSC to launch two battlegroups every year. Not that they will be launching those battlegroups, but that will be money drained from the defense and reconstruction budget and likely wasted on casinos.


 * Psi Serpentis system
 * Anilius - The major human colony in the Psi Serpentis system. Shares the system with the gas giant Viperdae.


 * Lambda Serpentis system
 * Jericho VII - Suffered a minor attack in 2530; attacked for the second time and glassed in 2535.

Menelaus Sector

 * Aeolus system
 * Endymion - a frontier world with comfortable middle-class settlements, as well as an elite education facility known as Endymion Gifted.


 * Gliese 710 system
 * Estuary - shared its system with the post war-colonised world Laguna. Attacked by Thel 'Vadamee.
 * Laguna - shares its system with the glassed colony Estuary. Has a population under 10 million by 2565.

Hermes Sector

 * 16 Cygni system
 * Masaq - a former agri-world glassed during the Human-Covenant War.
 * Tortuga - an airless moon with a single major port city within an enclosed canyon, Tortuga has become an independent free trade port along the Cygnus side Outer Colonies since the war and the glassing of 16 Cygni's primary colony world, Masaq. Has a population of under 10 million by 2565.


 * Kroedis system
 * Kroedis II - Attacked by Thel 'Vadamee. Had a population of more than 15 million.


 * Theta Cygni system
 * Nubion

Erinyes Sector

 * Amber system
 * Paradise Falls - Ironically named, as the world is reportedly hostile. Has a population under 10 million.


 * Cygnus system (Gliese 777)
 * Cygnus II - shares its system with New Jerusalem. Attacked by the Covenant but was not glassed. The world's major community was resettled after the war. An agent of the fetcher Oliver Birch was stationed here after the war.
 * New Jerusalem - invaded in mid-2552, but not fully glassed before the war's end. Due to its relatively light damage and strategic location, it was prioritized for reclamation.


 * Desdoron system
 * Desdoron V

Hypatia Sector

 * Urien system
 * Hardscrabble

Vesper Sector

 * 14 Herculis system
 * Ford - The colonial government on Ford is staunchly anti-UNSC and pro-independence, but the leadership and the general population want to secede peacefully. They are willing to sign a non-aggression pact with the UNSC, but the Fordian government isn’t powerful enough to make that stick. The colonial law enforcement and military organizations are either compromised or incapable of policing the system, so terrorists and pirates regularly seek shelter on the planet. These non-government forces regularly launch attacks on UNSC colonies and shipping. Has a population under 100 million.


 * Orrichon / Eta Coronae Borealis system
 * Sedra - A relatively unremarkable Outer Colony noted for its autonomy-minded citizenry and independent militia, though they remain part of the Phoenix Initiative.


 * Voy system
 * Thalassa - An oceanic world home to scientific and aquacultural operations colonized just before the Covenant War, it has a population approaching 10 million by 2565.

Norwind Sector

 * Tau Boötis system
 * Sandtrap - An arid world, Sandtrap nonetheless has a breathable atmosphere thanks to its rudimentary ecosystem. The planet was surveyed in the early 26th century, though mining companies have only taken interest in it since the 2540s. Since then, BXR has established an operation there, and in 2558, Traxus partnered with Mimbani Frontiers and several corporations to begin terraforming the planet and developing its infrastructure. By 2565, Sandtrap's settlements had a growing population of several million. The Tau Boötis Development Consortium has invested millions of credits to the planet's advertising campaign, and a subcontracted marketing agency has suggested renaming the planet to be more attractive to settlers.

Atlas Sector

 * Orgeluse system
 * New Reach - the first new major colony settled as part of the Phoenix Initiative, as well as the one with the most direct UNSC presence, making it something of a hub in the expanding Cygnus Verge. Military center, has a population under ten million.

Olympus Sector

 * Hestia system
 * Meridian - glassed beyond recovery, but remains home to a silicate mining operation and houses an orbital port that has become a confluence of newly-emerged slipspace lanes as well as a staging point for further expansion out into the Cygnus Verge. Orbits the gas giant Hestia V.

Augeas Sector

 * Csere's Star system - The meta-colony around Csere's Star has a good claim to the whole star system, as it includes an inhabited world and no less than seven inhabited moons. But for all the colony’s spread, it has a very weak heavy industry. It cannot establish any naval presence, and will have to rely on mercenaries or alliances with ex-Covenant groups for its defense. Csere's Star is also a system of great strategic importance, as it is the natural route of invasion for a number of loyal colonies. UNSC HIGHCOM estimates that if Csere's Star allies with a faction hostile to the UNSC, it will require ten times as many naval resources to defend the new border compared to just occupying that one system.
 * Jastolo - shares its system with the gas giant Marmalade Skies, has a population of under 1 billion.


 * Naxos / Naxos Prime system
 * Naxos Disk - a protoplanetary disk home to minor independent/pirate hideouts.

Geryon Sector

 * Estori system
 * Terceira - Independent human colony with a population under 10 million.


 * Moorhaus system
 * Spoketown - Space habitat with a population under 10 million.


 * Nereus system
 * Nereus X - minor outpost located in the Nereus system.


 * Tisiphone system
 * Barugi - Abandoned and quarantined due to runaway pandemic.
 * Nephis - A moon-colony similar to those on the Jovian Moons; economy largely based around zenostium mining.

Inare Sector

 * Marisova system
 * Monte Rosso - Has a population under 10 million by 2565, is an independent human colony. Named as such by its Venezian and Gao settlers for the red supervolcano dominating its face.

Thule Sector

 * 16 Cephei system
 * Hebron - Has a population under 10 million by 2565.


 * Iota Cephei system
 * Nyoo Oktaaviya - Rocky, dense world with unusual atmospheric disturbances. Working idea was that they favoured mechs due to long tracked/wheeled vehicles being unable to easily function in their environment. Has a population under 10 million by 2565.


 * Lambda Euboea system
 * Carcassonne


 * Valia system
 * Conquer - abandoned but never glassed.

Mnemosyne Sector

 * 43 Cygni system
 * Sigil - a superterran world named as such for the elaborate carving of a network of circular, labyrinth-like glyphs spanning two continents. While initially believed to be Forerunner in origin due to their various superficial similarities to Forerunner symbology, the megastructure has been dated to be millions of years old and does not correspond to known Forerunner techniques. The structure appears to be an inert carving engraved into the planet's crust, and no intact technology or other evidence of habitation has been found. Sigil's atmosphere of oxygen, nitrogen and argon is being steadily stripped away by its parent star, though conditions still remain hospitable in the vast canyons formed by the carving, which also house many distinct ecosystems. The biota in these canyons shares a common ancestry, but they have evolved in isolation for millions of years since the carving was created. Sigil was originally charted by Covenant explorers of the Fleet of Particular Justice during the war and is settled on the condition that Concord scientists are able to study the artifact under joint control with the UEG. By 2565, the planet only had a scientific and military presence of just above ten thousand, though once the artifact was confirmed to be secure, the Phoenix Initiative opened it up for development and settlement.


 * Rho Euboea system
 * Shambala - a corporate colonization project, Shambala only has a token UNSC presence. Has a population under 10 million by 2565, though it is touted to be one of the most promising new colony worlds.

Caelia Sector

 * Vidani system
 * Mindiria - Has a population under 10 million.

Elmaro Sector

 * Sverdlovsk system
 * Komoya and Talitsa - Orbiting the gas giant Vitalyevna, independent human colonies with a combined population of under 100 million by 2565.


 * Tanielu system
 * Binterall - Independent human colony. Has a population under 10 million.

Isbanola Sector

 * Cordoba system
 * Gao - independent human colony, industrial center. Hub of the Via Casilina Community alongside Venezia.


 * Elduros system
 * Aleria - independent colony, has a population under 100 million.


 * Lacaze system - former waystation system between Cordoba and Elduros; now superseded by Shaps and the Via Casilina.


 * Orso system
 * Venezia - an Outer Colony that becomes perhaps the most notable melting pot of the human and ex-Covenant civilizations. The original settlers were mostly an offshoot of the group that colonized the nearby Gao. While originally smaller than Gao, largely serving as a waystation and mining outpost, Venezia's population grew dramatically as a result of the migrations caused by the Covenant War. In the war's later years, a group of Covenant traders using the now largely defunct Tempest Crossing ingress route found their way to Venezia, followed soon after by other peripheral elements of the hegemony, including defectors, merchants, smugglers and pirates. For much of this time, Venezia remained cut off from the UNSC at large, only resuming contact in the post-war era. Has a population under 1 billion, industrial center.


 * Shaps system - largely unoccupied system charted after the war as a waystation of Via Casilina.
 * Myer's Moon
 * Shaps III - Shaps III has the remnants of a large Forerunner city.
 * Pydoryn - gas giant.
 * Taram - Moon of Pydoryn.

Alandro Sector

 * Yuna system
 * Glacier - Minor independent colony.

Lumoria Sector

 * Argus system - Located dangerously close to the navigational anomaly known as the Haldean Fissure.
 * Argus V - Formerly-unoccupied world. Original plans was to use it as the new training grounds for SPARTAN-III Delta Company. Connected via sliplane to Beukert.

Rigale Sector

 * Ponsi system
 * Diluvial - Independent human colony established after 2525. Connected via the El Camino to Lawder's Star.


 * Salvacion system
 * Primavera - Independent human colony established after 2525. Has a population under 10 million by 2565. Connected via the El Camino to Solis.


 * Solis system
 * Medina - Independent human colony established after 2525. Has a population under 10 million by 2565. Connected via the El Camino to Salvacion and Lawder's Star.

Tumaini Sector
}}

Perseus Quadrant / FLEETCOM Sector 4
{{Col-2

Copernicus Sector

 * Tau Ceti system
 * Strauss' World - One of the oldest Inner Colony worlds. Glassed during the war.
 * Marathon Station - A spaceport set up by the survivors of the invasion of Tau Ceti in an old asteroid habitat over the glassed Strauss' World to accommodate ships traveling along the Via Serena.


 * UV Ceti / Luyten 726-8 system
 * Luyten - an old, densely-populated near-Earth Inner Colony. Home to the Spartan-II candidate Caleb-095. Has a population of under 1 billion.

Argo Sector

 * 107 Piscium system
 * Actium - an Inner Colony world glassed in 2545 after a several-week-long battle.


 * Eta Cassiopeiae system
 * Josaphat's Folly / η Cassiopeiae Secundus - an icy world named after its discoverer, the billionaire Josaphat Pirandello, who spent his lifetime and fortune searching for theorized alien ruins that ultimately weren't there.
 * The Swarm - a habitat-conurbation orbiting Eta Cassiopeiae Secundus, what is popularly known as the Swarm was founded as the headquarters for an asteroid-mining operation deeper in the system, the Swarm became a secondary waystation during the settlement of the Outer Colonies, and eventually gentrified into a high-technological hub. The colony was established by East African conglomerates, though it has a prominent East Asian population, and some of its elements have since become fairly cosmopolitan. Having survived the war, the Swarm is now a gateway to the Via Serena trade route bound from Sol to the Pleiades Corridor, and has seen a fairly dramatic increase in population with transitory settlers and refugees, most of whom have been dumped by the local government on Josaphat's Folly in rapidly-erected dome-cities and habitats built in the old ice warrens dug by Pirandello's explorers.


 * Gliese 892 system
 * Gingham - shares its system with the gas giant Mariposa.
 * Mariposa - gas giant.


 * Groombridge 34 system
 * Phocis - Minor colony mainly founded around a military base. Shares its system with the abandoned Station Delphi.


 * Soyuz system (Lalande 21185)
 * Baikonur - Glassed; now has a population under 100 million.

Epicuros Sector

 * 10 Tauri system
 * Micronesia - a meta-colony consisting a number of small mining outposts across the system's asteroid belts. Had Insurrectionist activity prior to 2525.


 * 111 Tauri system
 * Victoria - home base for General Graves, one of the three generals of the ULF.


 * Alpha Aurigae system
 * Capella - shares the system with the Origami Asteroid Field. Defended by Cole's fleet in 2526, where he secured a costly victory. Eventually glassed.
 * Origami Asteroid Field - shares its system with Capella. Has a population under 10 million by 2565.


 * Groombridge 1830 system
 * Lemuria - Also known as Groombridge 1830, was the location where Cole's fleet recovered a Sangheili survivor in 2530 and, subsequently, led to the creation of the Cole Protocol.


 * Lambda Aurigae system
 * Roost - resort world known for its fishing.


 * Theta Persei system
 * Greydowns - the name of two moon-colonies orbiting a gas giant, primarily founded around resource-extraction operations such as fusion fuel mining and zenostium harvesting. It had a population of almost 77 million by the time it was attacked by Thel 'Vadamee.

Artemis Sector

 * 19 Draconis system
 * Hellas - one of two colonies, along with Fumirole, where rebel forces were known to use rumbledrugs in an attempt to counter the SPARTAN-IIs.


 * 26 Draconis system
 * Levosia - Outer Colony and exporter of refined selenium and technetium, operations crucial for the building of slipspace drives. Historically rebellious, and site of the Callisto Incident in 2494. If the mining/refining (both?) operations remained intact during the war, the world would've remained a strategic asset. Most likely glassed in the later half of the war. Industrial center.


 * Bhaakto system (HR 511)
 * Alluvion - attacked by Thel 'Vadamee.


 * Iota Persei system
 * Iota - known for the bloody UNSC's final retreat from the colony.


 * Sigma Draconis system
 * Fumirole - invaded, but survived total glassing. Due to the system's location, the UNSC prioritized industrial reconstruction and bolstered its military presence post-war. Connected via sliplane to Epsilon Eridani, Draco, and 26 Draconis. Was already an industrial center, but has become a military center at some point after 2525.


 * Trappist / Trappist-1 system - Home to various scientific and mining operations.

Apollo Sector

 * 85 Pegasi system
 * Monsoon - A world named for its tropical rains and dense vegetation. Home to a bewildering array of native biota, some of which impeded colonization. As such, the human presence was largely of a scientific nature, though minor industries existed.


 * Eta Cephei system
 * Pharos - a "hothouse world" that served as a UNSC mining and industrial colony as well as a materiel depot during the war (military center). While only the UNSC facilities and bunkers were turned to slag, with most of the planet's surface spared from glassing, the planet remains of little to no utility as most of the colonies beyond have been destroyed.


 * Gliese 898 system
 * Tiamat - anomalous gas giant. The Tiamat system has attracted salvagers to its former colonies and a small group of ex-Covenant fanatics seemingly interested in Tiamat.
 * Bolder - moon of Tiamat and former agri-world. Glassed beyond recovery.
 * Calvary - former UNSC outpost-world and minor mining outpost.

Pelagius Sector

 * 50 Persei system
 * Marrow - orbits the gas giant 50 Persei VI.


 * 56 Aurigae system
 * Verent - a colony founded right before the Human-Covenant War. Few of its population escaped the attack.

Nomos Sector

 * Nussbaum system
 * Backwoods


 * Pi Ursae Minoris system
 * Sansar

Tychus Sector

 * Draco system (HD 193664)
 * Draco III - an ocean world known for its gold-tinted seas. The Covenant conducted an infamous massacre of its population by hunting Unggoy and Kig-Yar, which led to the SPARTAN-IIs wiping out the Covenant forces. Suffered moderate damage in subsequent glassing but was prioritized for recolonization, along with the establishment of a UNSC base due to the system's strategic location. Connected via sliplane to Sigma Draconis, Pi Ursae Minoris, and Eta Draconis. Became a military center during/after the war.

Ignale Sector

 * 51 Pegasi system
 * Dimidium / Bellerophon / 51 Pegasi b - gas giant.
 * Salient - a minor moon of the gas giant Dimidium home to a waystation established since the war, built partly on former Covenant infrastructure.
 * Pegasi Delta - an arid, inhospitable moon. Pegasi Delta had been charted by human explorers and the system had a low-key presence comprised mostly of independent miners before it was taken over by the Covenant. Pegasi Delta has a breathable atmosphere, although just barely, thanks to the primitive photosynthetic life present in the oceans. In the early 2540s, the moon housed a Covenant refinery destroyed by SPARTAN-III Beta Company in Operation: TORPEDO. Now largely uninhabited, though pirates and salvagers are known to have used it as a stopover, and one of the corporations associated with the Phoenix Initiative has contemplated the possibility of establishing a fuel mining operation there.

Summa Sector
Site of a deep-space incident in 2528.


 * Upsilon Aquarii system
 * Long Shot - reclaimed after the HCW, became a military outpost and expansion stopover.

Gandhari Sector

 * Chi Ceti system
 * Chi Ceti IV - Housed UNSC mining operations and ONI's Damascus Materials Testing facility. Was attacked by the scouting frigate Unrelenting in 2525, which saw the SPARTAN-IIs use their new Mjolnir suits to destroy it. The Damascus Facility was abandoned during the battle, with its data cores wiped. The system has since been unoccupied due to being compromised to the Covenant.


 * Sigma Ceti system
 * Behemoth - Former Covenant outpost world destroyed by a UNSC counterattack late in the war.

Anderson Sector

 * 12 Persei system
 * Solaris


 * Algol system - binary star system.
 * Algolis - former industrial centre, home to a weapons research facility. Located in the Algol System, Anderson Sector, Sector 4.

Clavain Sector

 * Avalon / 12 Persei system
 * Nouveau Montreal - a small, fairly insignificant Outer Colony that had the fortune of being spared the war even as other worlds around it burned. Likely saved by its obscurity, though refugees from its neighborhood flowed in throughout the last decade of the war. Assumed newfound importance in the post-war era as the only world left standing in its sector, though its government remains ill-equipped to handle the influx of commerce and people through the system. To prevent its own economy from collapsing, the world has made deals with post-Covenant entities, with a Chikri-Merkaa Conflux-based spacer guild aiding in the reconstruction and expansion of its orbital docks. This will later make it a fairly popular base of operations for Outer Vigil ships operating in the Perseus-side Joint-Occupation Zone.

Amari Sector

 * Eta Draconis system
 * Oban - used as a place to resettle refugees after the Human-Covenant War, used as a staging ground for UNSC Navy exercises. Has a population under 10 million by 2565.


 * Frisco system
 * Tirol

Anvar Sector

 * 11 Aquarii system
 * Dundee


 * Arethusa system
 * Fulcrum Station - Waystation of the Nova Imbrium route established since the war.


 * Epsilon Cephei system
 * Bhuj


 * Lysander system
 * Far Isle - Destroyed with overwhelming nuclear bombardment in 2490.

Handel Sector

 * Quyen system
 * New Vietnam - an asteroid originally mined out by the Covenant during the war and since settled largely by refugees from Sector 4. Has a population under 10,000 by 2565.

Leggat Sector

 * Alamer system
 * Scrimshaw - A cold desert world with a striking appearance resembling patterned ivory; home to a minor colony.


 * Rubicon system
 * Cusp - A barren world housing a minor human colony established since the war as a waystation of the Pleiades Corridor route, Cusp was founded as a UNSC Naval outpost intended to police the unofficial settlements, trade ports and pirates operating in the system since the war, as well as to support missions further out along the Pleiades Corridor. The route's strategic and commercial value quickly made Cusp one of the fastest-growing hubs of the region as the UNSC struggled to keep up with the unsanctioned elements operating in the Theian Crescent. By 2565, its population was approaching 10,000, and the establishment of mining and fuel harvesting operations across the Rubicon system was well underway.
 * Typhon - A former human mining colony later host to a Covenant supply base eliminated in a counteroffensive in the later years of the war. Scavengers and pirates made their home in the devastated Covenant and human infrastructure afterward.

Apeiron Sector

 * Heiles system
 * Trinity

Trautmann Sector

 * Athi system (98 G. Aquarii)
 * Eldoret - Agricultural center, shares its system with the glassed planet Estuary. Has a population under 10 million by 2565.

Hoberman Sector

 * Glasir system
 * Losing Hand - initially consisted of a small, semi-unofficial fringe settlement with an independence-minded population. A world with a primarily oceanic environment with little in the way of large landmasses, it only has a relatively narrow habitable band around the equator and a relatively cool climate, whereas much of the northern and southern hemispheres are covered in ice and have frigid temperatures. Any possible landmasses beneath the ice sheets are largely hypothetical. A terraforming company has contemplated the possibility of warming up the planet to free up more space for habitation, but melting the ice sheets would likely cover the few landmasses the planet currently has. As such, development has stalled under the Phoenix Initiative, though the planet has seen immigration by miscellaneous small groups, mostly of refugees, which settled on archipelagos across the planet.

Tangaroa Sector

 * Bouvet system (HD 211575)
 * Furthest Point - Has a population under 10 million by 2565.

Anodos Sector

 * Gamma Tauri system
 * Amethyst Skies

Skaldi Sector
}}

Post-war development notes
A few things to keep in mind with reclamation projects and the expansion of existing colonies:
 * Most agri-worlds are gone, so efforts will be made to make colonies self-sufficient, e.g. by clearing farmland (c.f. Charybdis IX in The Cole Protocol).
 * Due to logistical realities, only a handful of new worlds are settled at first after the war is over, with most initial efforts focused on integrating refugees to existing or reclaimed worlds. Not all of the new colonies were formally set up; there were numerous groups of refugees and dissidents that simply landed on a planet and called it home. Many such worlds are not even known to the UNSC.
 * The refugee crisis and overall displacement of populations should not be underestimated, and what makes things tricky is that most evacuation efforts weren't exactly under any central authority; UNSC ship may have protected evac convoys wherever they could, but there are hundreds of independent operators in the business, many of them impromptu in nature.
 * It's easier and more cost-effective to keep large numbers of people on ice than thaw them out, so this is what smart or well-organized operators will be doing until their cargo can be guaranteed reasonably humane conditions when awake. Unfortunately, most evac efforts were anything but well-organized, there weren't often even facilities to freeze all the evacuees, and ship captains (or the companies that run them) will be looking to get ride of their cargo as soon as possible, often just dumping them on existing colonies in the absence of better options. However, there were still "arkships" stacked full of almost nothing but cryotubes, built or converted by planetary governments, large companies or the UNSC in the later half of the war. While not all such ships made it, it is suspected that millions still remain frozen, waiting for the right time and place for relocation.
 * This also has very human and personal implications; it will displace people in not just space, but time as well. People will sleep away the years, even decades while their family, friends or relatives go about their lives elsewhere, usually thinking the sleepers dead; and when they wake, they will be separated by years or decades.