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Wikipedia There is more information available on this subject at Mars on the English Wikipedia.


Time on Mars tends to give a man... perspective.
Edward Buck, talking about Taylor H. Miles.[2]

Mars, known to Forerunners as "Edom,"[3] is the fourth planet in the Sol system, after Earth, but before Jupiter.


The ForerunnersEdit

Mars was once part of the Forerunner Empire 100,000 years ago, when it was known as Edom. The planet was mostly inhabited with Miner-class Forerunners. Bornstellar-Makes-Eternal-Lasting was sent there by his Builder family to "learn discipline."[3]

Human ColonizationEdit

Mars was the first world colonized by humanity in 2080 and quickly became a major industrial hub. It has since been terraformed into a planet with near-Earth conditions, becoming home to many.[1]

Interplanetary WarEdit

Main article: Argyre Planitia Campaign

Regardless, Mars was the site of a decisive battle during a period where the United Nations organization transitioned into the United Nations Space Command.[4] The UNSC Marines routed the neo-Communist Koslovics on the planet during a series of brutal conflicts in the 2100s before moving on to destroy the Koslovic and Frieden movements throughout the solar system.[5] Following the signing of the Callisto Treaty the remaining Koslovics were put down in a series of harsh crackdowns.[1]

Human-Covenant WarEdit

Fleet of Furious Redemption

The Fleet of Furious Redemption above Mars.

Main article: Human-Covenant war

During the Human-Covenant War, a contingency plan was composed where Earth's and Mars' military industry facilities would be relocated once their locations were at considerable risk of being discovered. After the Fall of Reach, NAVCOM concluded that Earth's location had likely been compromised, and evacuations began.[6] Evacuations were not completed in time, and the Misriah facilities were brought into full production to resupply UNSC forces.

Attack on MarsEdit

Main article: Battle of Mare Erythraeum

Once again, Mars was the site of a large scale engagement set on the fields of Mare Erythraeum. There, Colonel James Ackerson and his UNSC Defense Forces combated against the Covenant Loyalist Army, commanded by Jiralhanae Chieftain Lepidus, a battle the UNSC also lost.[7]


The Martian economy, based on the companies that are located on Mars, is mostly weapon and military equipment manufacturing. This might be a reference to the fact that the planet was named after the Roman God of War, Mars.


While not much is known about the trading on Mars. Misriah Armories does produce their products on Mars and then more then likely ships out their products to other colonies. It is known though, that Mars had at least one space elevator.[8]


In orbit, there were several shipyards. One of these facilities was the Reyes-McLees Shipyards.[9] After the war, these shipyards and the ones on the surface remained the primary UNSC shipyards.[10]

Corporations On PlanetEdit

There are many corporations that call Mars their home, either through commercial/administrative offices or industrial complexes. These corporations include:


Mars was under the protection of the Home Fleet, which protected the entire Sol system.




Known ResidentsEdit


  • The colonization of Mars was a major plot point in Bungie's Marathon.
  • Although Mars has been terraformed, it is always portrayed as barren and dusty.



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