The Covenant was a religiously Zealous Hegemony of multiple alien species, controlling
a very large portion of the Orion Arm of the Milky Way galaxy. More
specifically, the Covenant's government system was a Hierarchical Theocratic Oligarchy, having a caste system and being ruled
by a group of specific individuals. They waged a Genocidal Campaign against humanity
until they were defeated due to many factors, the most pressing of which was internal conflict.
The Covenant was presumably dissolved after its defeat by the UNSC and Covenant Separatist forces. It is unknown what happened to members of the Covenant after it
disbanded, though it is assumed that many returned to their homeworlds.
The name "Covenant" was taken from the binding pact that forged the peace between the Elites and Prophets. They allied to each other after a long war, which had thousands of casualties. They are combined forces of alien races,
and act as the main antagonists in the Halo universe. The war which had devastated their respective races for years, was fought
over the Forerunners artifacts on the Elite home world, Sanghelios, with the Elites wishing to preserve them, and the Prophets wishing to use the artifacts to activate them. The Elites held
a distinct strategic upper hand, as their militaristic society was ready for a war, but the Prophets had one massive advantage;
an immensely powerful Forerunner construct known as the Dreadnought. After the Prophets decided to use the Forerunner Dreadnought against the Elites, the Prophets destroyed the Sangheili forces, while the wise and prudent Elite Commanders, realizing their
peril, laid their arms aside and conceded defeat, also doing away with a hatred towards the Prophets. When the Prophets found
evidence of the Forerunners and their "Great Journey", hoping to create a peace between them, told the Elites of their discovery and promised to find the means of the Forerunners'
transcendence. The Prophets would share this knowledge with the Elites who in turn would protect the Prophets from harm as
they searched for transcendent Forerunner artifacts to activate all the Halo Installations. These ideas would be put into the Covenant's founding document, the Writ of Union.
At first, the Covenant were only a loose non-aggression pact of two races held together by a common need to avoid mutually
assured destruction. But, as their society advanced, so did their technology, culture, and religion. By the time of the Halo games, the Covenant controlled a large part of the Orion Arm of the Milky Way galaxy. They discovered and conquered various races.
Their society had evolved into a complicated caste system, with the Prophets governing the Covenant, and the Elites left in
charge of the military. The Covenant was a theocracy, based on prophecies about the Sacred rings and The Great Journey. The
primary belief of the Covenant was that the Halos will allow them passage into the "Divine Beyond", where they might join
the Forerunners as gods, while those who did not believe in the Great Journey would be left behind to die by the power of
the Halo Rings.
 The Government
The Covenant is governed by the High Council, which is led by a trio of Prophets and consists of lesser Prophets, Legates and very high ranking Elites, which are known as Councilors. However, near the start of the Covenant Civil War, the Prophets began to replace the Elites with Brutes in various positions within Covenant society, including the protection
of the Hierarchs and command of the Covenant Fleets. The Prophets of Truth and Mercy used the Prophet of Regret's assassination at the hands of Master Chief as an excuse to replace the Elite guard with Brutes. The Prophets then secretly ordered the Brutes to commit genocide against
the Elites, and thus leading to the beginning of the Civil War.
In addition to the High Council, there are three other Councils: the Council of Concordance, the Council of Deed and Doctrine and the Council of Masters.
Numerous Ministries exist within the Covenant government as well, each of which possesses a single role.
Covenant society is based around a caste system of the species below. Many of the alien species conquered by the Covenant
are conscripted into, or gradually become part of the alliance. However, during first contact with the Humans, The Oracle on board the Forerunner Dreadnought revealed to Truth and Regret that Humans are "My Makers", as shown by its luminary. Since the entire Covenant was based on
the belief that the Forerunners had transcended, Truth and Regret knew if any of the other races found out what the Oracle
told them, the Covenant would break apart.
As the highest caste, the Prophets lead the Covenant and exert complete control over all religious and political affairs. Physically weak, Prophets wield power
through absolute command of the Covenant and through scavenged Forerunner technology, leaving the task of conquest to the Elites and the other races. Their higher understanding of the Forerunners
gives them great ego and religious powers over the Covenant. The fact that the Covenant are religious zealots makes it all
the more easy to control them. They are addressed as "Hierarchs", "Noble Hierarchs", "Holy Ones" or "Exalted" by the other races of the Covenant. Prophets enforce a misguided theology based
on the belief that firing the Halo Array will herald some kind of sublimation event called the "Great Journey", which they believe will lead them to the Forerunner's final destination, but unbeknownst to them it would lead them to
their death if the Halos were activated. They are called San 'Shyuum in the Covenant language. The most recent and final Hierarchs were Regret, Mercy and, Truth. Prophets will abandon their allies at any moment, as they regard their own self preservation over everything else. This
was shown when the Prophet of Truth abandoned Mercy to the Flood.
Brutes are one of the newer species to the Covenant and are the only race that has obtained equal status to that of one
of the founding "clients" of the Covenant pact, the Elites. They have an incredible natural resilience to damage because of
their tough rhino like skin that makes up for their lack of Energy Shields (be it noted that later in Halo 3 they get power armor), and use a number of weapons and vehicles based upon their pre-Covenant technology. Some chieftains in Halo 3 and Tartarus from Halo 2 are also equipped with invincibility. As opposed to standard Brute combat, Brutes sometimes will go "berserk", and will try to and usually kill anyone or anything
in its path. The said Brute will charge mindlessly in the event of its armor being shot off, it's companions being killed,
or several other circumstances. Brutes have their own ranks going up to War Chieftains who usually wield Plasma Cannons, Fuel Rod Guns, or Chieftains who usually wield Gravity Hammers. The Brutes always work in packs of 3-8 when possible. Brutes are unlike Elites in that they do not have an aversion to using Human weapons,
as shown in the books and Halo 2. After the Elites were replaced for failing to protect the High Prophet of Regret from the "Demon", they took over their role as personal bodyguards of the Prophets and also now make up most of the Covenant military. They have a hairy, ape-like appearance with rough, rhino-like
skin and a highly resilient body. They are known as Jiralhanae in the Covenant language. It was said in Sierra 117 that the Brutes may be doing something to the Grunts to make them more resilient and stop them running away, they were probably putting something in the methane the Grunts breathe
or the Brutes were giving them threats.
Elites served as the military leaders of the Covenant before the Great Schism in 2552. While Prophets often had the final
say, it was the Elites who organized military campaigns and naval engagements. Ship Masters commanded ships, Fleet Masters commanded fleets, and Field Masters commanded the vast armies. Elites maintained the military structure of the Covenant and ensured the Prophets' orders were
followed, as well as their own. They also had a diverse rank structure which was based off how many foes an Elite had killed. They were a major component of the Covenant and were the
only caste able to maintain the military hierarchy as well as having a voice within the High Council. Later on the Elites would be tested and shoved aside from their zealous role as Covenant military leaders by the Brutes.
As the Prophets and Brutes attempted genocide of the Elites, the angered Elites left the Covenant, causing a civil war within the Covenant which would end with the Covenant Loyalists adding the Elites to their list of enemies, and the Covenant
Separatists becoming allies with the UNSC. They are called Sangheili in the Covenant language. An "ee" at the end of an Elite name, such as "'Notodee,"
would signify that that Elite is a part or was part of the Covenant military, although, after The Great Schism many elites
removed the "ee" from their name to show they had left the Covenant.
Hunters are actually an assemblage of worm-like entities called Mgalekgolo that create a communal, armor plated form. In this form, they are known as Lekgolo. They usually fight and travel in pairs known as "Bond Brothers" (which technically means that not all of the colonies
of worms were able to fit within one set of armor), and are the strongest Covenant fighting units. They wield powerful Assault Cannons and a massive shield resistant to any small arms fire. They are usually used as shock infantry, and are only deployed on
the battle field when in need of a heavy force. Their political and religious motivations are completely unknown. Their weaknesses
are their exposed orange flesh, which is located on their backs, stomach, and neck. In Halo 3 the leadership offered more protection by covering their stomachs with more armor. Their main weakness is when their back
is turned, because of the lack of armor they have there. They are one of the most powerful Covenant foes, challenged only
by the Brutes in Halo 3 and the Elites in Halo 2.
These flying, insect-like creatures referred to as "Drones" served almost exclusively as engineers, but were replaced by
the Huragok. They became the second Covenant species with the ability of flight. Their ability to fight on the wing makes
them an excellent strategic weapon against ground-based opponents. Unlike most other Covenant races, the Drones do not require
an oxygen-nitrogen atmosphere or a methane environment, as Grunts do, to survive. They are called Yanme'e in the Covenant language. Some people believe that Drones had joined the Covenant some time in between Halo: Combat
Evolved and Halo 2. This can be proved false, as they appear in the novel Halo: Contact Harvest, which was
the first Human-Covenant contact. They are similar to the drones in the first Marathon game.
Due to their superior senses, Jackals are the scouts and marksmen of the Covenant military. They are about 5'6" tall and
due to their lack of physical durability, they carry a portable Energy Shield generator during combat. Jackals are employed mainly as sharpshooters with their excellent vision and dexterity, and are
also deployed to defend strategic areas. When a Jackal is under fire, it will cover its head with its hands and trot away
to another position from which to fire from. The first Human contact was between Staff Sergeants Johnson and Byrne on a Human freighter as Jackal pirates tried to board the ship. Jackals have never been seen using grenades except in the
book Halo: Ghosts of Onyx. This is probably because they wield both their weapon and their shield, and so cannot throw grenades while dual-wielding.
They are called Kig-yar in Covenant language. Jackals were the first Covenant race that the Spartans encountered, as seen in The Fall of Reach.
Grunts are the most common and lowest-placed caste of the Covenant, as the name implies. Despite their notable cowardice
and ineptitude, they are quite dangerous in large numbers, which may have been why an Arbiter was needed to quell the Grunt Rebellion. They breathe a methane mixture and thus must wear a large tank on their backs full of the methane to live. They fight well
on Plasma Turrets and use the Plasma Pistol and Needler, sometimes wielding the Fuel Rod Gun as well. If their leader is killed, Grunts will run away or they may go Kamikaze by activating two Plasma Grenades (one on each hand) while charging at you and yelling gibberish, and Heretic Grunts will fearlessly charge the enemy when their leader is dead. Their discipline is dependent upon strong leadership and strength
of numbers; however, when leaderless, they will present significantly less resistance, often cowering. They are called Unggoy
in the Covenant language. Unggoy have a considerable amount of physical strength, enabling them to wield large weapons in
the Covenant arsenal. They have learned many Human languages from intercepting transmissions between Human vessels, a fact
that they apparently take great pride in. During the Covenant Civil War they, as well as the Hunters, did not fully support either side, though most sided with the Elites, remaining extremely loyal to their "savior", The Arbiter. Their speech is high and squeaky, they find nothing wrong with this, but most other races find it comical.
Engineers appear in two games: Halo Wars and Halo: Combat Evolved. In Halo: CE, one would need Halo Map Tools to bring
it into the game. In Halo Wars, it is a support unit used to heal Covenant units. In military terms,they are a non-militant
race. They are needed to maintain the Covenant war machines and will only converse with the Prophets (also Grunts who learn
their language). This, however, indicates Engineers are very high in the caste system, probably because the Covenant are aware
of how much they are needed and that the Engineer's grasp on Covenant and foreign technology, constantly examining
or repairing any nearby technology regardless of affiliation or taking things apart and then reassembling them either to original
shape or something new. Most of the Covenant's technology is either scavenged or stolen. It is believed that the engineers
helped the Covenant to understand how to use the technology effectively. Engineers are actually an artificial species created by the Forerunners, which could contribute to their high status.
They are called Huragok in the Forerunner and Covenant language. They were removed from the final version of Halo: Combat Evolved (though they are still present in the code, they are not used), but feature in some of the novels and Halo Wars.
 Deleted Races
- Drinols are creatures in the form of bosses that did not make it into the Halo games. They are thought to have been remade
into the Flood's Tank Pure Form.
- Stalkers are a Covenant race that did not make it into Halo 2, seen in the Halo 2 Collector's Edition Disc. They were taken from original idea sketches of the Elites in the
first Halo game and were supposed to be very wiry and skeletal, with massive amounts of teeth, similar to sharks.
- Keelbugs are only seen in the Halo 2 Collector's Edition Disc. They were a cross between Drones and Brutes, more like Drones
but without the insect-like look to them. They were supposed to fly into the battlefield, cut dead bodies into sections, and
fly off with them. They seemed to be more like animals than a sentient race.
- Alien Troopers are seen in the Halo 2 Collector's Edition Disc. It is understood to be a deleted form of soldier that would complement
the Elites. The only known data is that it was supposed to carry its weapon under its belly.
- Special Purpose Snipers are seen in the Halo 2 Collector's Edition Disc. Their arms were used like a tripod, so they could flip from side
to side, without having to switch weapons. They would also be able to hang from trees.
- Sharquoi were mentioned in the Halo 2 Collectors' Edition Booklet, detailing conversations among Human and Covenant individuals. Nothing seen in any Halo product outside of that
mentioning can be called a Sharquoi with any certainty.
 Creatures Inhabiting Covenant Worlds
- Scrub Grubs are small creatures the equivalent of the rats found on Humanity's home world, Earth. They were first mentioned in Halo: Contact Harvest, while inhabiting a Jackal ship.
- Zap-Jellies are sea creatures that live on the Grunt home world, Balaho. Possibly the equivalent of large jellyfish on Earth.
- Thorn Beasts are a food source for the Covenant. Only observed being eaten by Brutes. The only reference to the Thorn Beasts is in
Halo: Contact Harvest, when the Brutes are first mentioned, and Halo Wars, in at least one of the timeline periods.
- Mud Wasps are insects found on the Grunt home world, Balaho.
- Shade Crabs are crustaceans found on the Grunt home world, Balaho.
 Religion and Culture
The Covenant society and culture is based solely on worshiping the Forerunners and recovering their sacred artifacts. Because
of this, they often have to turn to war to achieve their ends, and so the Elites, and later the Brutes, have a very high place
in their culture as they protect the Prophets from external and internal threats. In Covenant society, personal vendettas are not tolerated.
Because of the Prophet's links to the Forerunners, they possess superior technology, and this, combined with the unique
abilities of the client races, helped to push the ever-growing war machine of the Covenant. The client races are nearly enslaved
by the Covenant, forced to live a completely different way of life. Their past cultures are all but erased, and the only practical
way for them to relive their former cultures is through dreams. Most races are only kept for their varying skills to be exploited,
rather than to be a part of a flourishing empire. Hunters, for example, are indomitable ground forces, and so they were conquered
by way of orbital bombardment to help the Covenant in close-range combat, rather than from star ships.
The Forerunners, a long-since vanished and utterly mysterious civilization, are revered as Gods by the Covenant, although
their original nature was certainly not divine. The Covenant belief system is underpinned by the existence of numerous abandoned
Forerunner artifacts, objects and installations. Of these, the most notable are the seven Halo rings, said to be the locations at which the Covenant belief of the Great Journey may be begun. The evident technological perfection of Forerunner objects, and the awesome and unknown purpose for which these
artifacts exist, has powered the Covenant theology for millennium.
It appears that the Covenant's faith is solely qualified by finding the Forerunners' abandoned technology scattered throughout
the galaxy. However, much of this Forerunner technology is as obtuse as it is arcane. It can only be guessed at what its true
purpose and origin might be. That said, they have been able to incorporate some Forerunner advancements into their weapon
and transport technology. The Covenant, then, are mainly driven by their fanatical devotion to religion. The client races
are held together by a common belief; the slave races are driven by the religion which they have been forced to accept.
 The History Of The Covenant
- Main Article: History of the Covenant
The Covenant divided their history into eons called Ages. There are at least eight ages, although their exact
order is uncertain. The Ages are named according to things that have happened or are happening in them. This also means that
the lengths of the Ages vary, with some longer than others. Halo Wars, Halo: Combat Evolved and Halo 2 take place during the 9th Age of Reclamation, which began during the events in Halo: Contact Harvest.
—Maccabeus and the Jiralhanae of the Rapid Conversion. 
- "The First Age: Ignorance and Fear.
- The Second Age: Rivalry and Bloodshed.
- The Third Age: Humility and Brotherhood.
- The Fourth Age: Wonder and Understanding.
- The Fifth Age: Obedience and Freedom.
- The Sixth Age: Faith and Patience.
- The Seventh Age: Journey and Salvation.''"
It is notable that the "7 Rings" and "7 Ages" are related. When coming upon Installation 04, the Pillar of Autumn's crew
"discovered" the ring. When coming upon Installation 05 in Halo 2, it is possible to say that the Covenant Separatists "converted"
to the UNSC forces.
- Main Article: Technology
Covenant technology is repeatedly referred to as more imitation rather than innovation, unlike their human enemies. Some may say that their technology is far more advanced than that of humanity. Their technology is based largely on mimicry of the leftover Forerunner artifacts they have discovered; their weaponry
is mostly plasma based and most of their vehicles are capable of hovering. Most of the Covenant's hand-held weapons (except
the Fuel Rod Gun, Needler, Carbine, Brute Shot and later the Mauler, and Spiker) use magnetic coils to direct the usually unstable plasma.
While Covenant technology is far more advanced than humanity's, the Covenant seem to be ignorant of how precise or powerful
their technology can be. Covenant slipspace engines, for example, are more precise and faster than a human engine, but the Covenant use their engines slower and less
precisely than they can be used. This is because the Covenant don't bother to learn the principles behind the technology they
use. Cortana used this to her advantage on the captured Covenant Flagship Ascendant Justice by reconfiguring the electromagnetic shaping coils to shape the plasma into a thin, sustained beam that, while very effective,
consumes plasma at an astonishing rate. These Plasma Torpedoes are said to be a much more powerful torpedo, breaching a larger
Covenant ship's shields and hull in one shot. These were seen in the book Halo: First Strike. Covenant starships use Repulsor Engines for propulsion in space, rather than traditional chemical rockets presumably used by the UNSC. As found in Halo: Contact Harvest it seems that the Covenant have a reasonable understanding of herbal medicines.
Only two Covenant AI have ever been found. One was a rampant AI that was stationed aboard the Ascendant Justice and destroyed by Cortana, while the other was The Seeker, sent to infiltrate UNSC systems and alert the Covenant to the location of Earth. Given their continued scarcity, and the
Prophet's traditional ban on artificial intelligences, it is unlikely that they are anywhere near as common as UNSC AI's.
However, Cortana's copy references several AI's being present in the Unyielding Hierophant system when the Spartans infiltrate the base.
Covenant architecture is known for its curved and sophisticated style, likely for the aesthetic tastes of the higher-ranked
castes. Constructed of distinctive purple or white metal, these colors are the main focus of Covenant design and distributed
throughout their starships, vehicles, and weapons. The metal they use is unknown to the UNSC but is very strong and resilient.
- Main Article: Covenant Military
Like other civilizations, the Covenant maintains a permanent armed forces branch, used to enforce order, conduct atmospheric
and space combat operations, and generally project the Covenant's power onto others. Formerly led by the Elites prior to the
Covenant Civil War, the Loyalist branches are now led by the Brutes. The military comprises of the Covenant Navy, the Covenant Army and the Special Warfare Group containing the Special Operations Division (SpecOps). It may be noted that even though their technology is much better than the Human's and their numbers are much larger as well, as ground warriors the Covenant are much less capable and are often defeated,
at which point they usually retreat to space and glass the planet.
- Main Article: Covenant Weapons
The Covenant boast a large arsenal of Directed-Energy-Weapons, largely plasma-based (though they also utilize lasers and
particle beam weapons). Most of the Covenant's weaponry uses a form of magnetic channeling that humans can only match with
the MAC cannon aboard starships and the Warthog mounted M68 Gauss Cannon. The plasma that is used in Covenant weapons are mined from deep inside the Unggoy planet Balaho. When it was depleted, the devices of cloning was already advanced, so they were capable of making millions of tons of plasma
in a single day.
Plasma-based weaponry is extremely effective against the Covenant's own Energy shields. The amount of shots that can be fired tends to be very high, but power cannot be recharged without a recharge station nearby,
and firing many shots in a short duration can cause the weapon to overheat, which reduces energy efficiency as well as forcing
a temporary cooling period in which the weapon cannot be fired. Once the Plasma reserves are used up, the weapon is useless. As is evidenced in some of the game files, recharging is possible, although
this technology cannot be used by the Master Chief or the Arbiter in Halo: Combat Evolved, Halo 2 or Halo 3.
With the introduction of the Brutes as the major military caste within the Covenant, their weaponry has found widespread
use. Utilizing crude projectile-like metal spikes in place of plasma, human-based hand held Shotguns "Maulers", explosive grenade-like launchers, and sharp blades, they are more primitive, yet brutal - fitting, considering the nature
of their creators, the Brutes.
There are three known types of dedicated melee weaponry used by the Covenant. The first, and certainly most well known,
is the Energy Sword, used solely by the Sangheili. Creating a solid blade of superheated plasma, it has both ceremonial and martial value to the Sangheili warriors, and its
possession is closely monitored. Secondly is the Gravity Hammer, used by Jiralhanae, which seems to be the cultural equivalent to the sword – rather than using a blade of plasma,
it can generate a gravitational field, doing devastating damage. The third has not yet been seen in a game, but is used by
Unggoy and Kig-Yar – an Energy Cutlass, a crystal similar to those fired by the Needler, used in melee combat, capable of embedding in a target and exploding. The Jiralhanae Brute Shot, and the Spiker are extremely capable in melee combat.
Covenant Vehicles use advanced anti-gravity technology for propulsion, as well as utilizing Plasma Cannons as offensive weaponry and are mainly being constructed out of a high-strength purple metal. Though often faster than their
UNSC counterparts, Covenant vehicles are more unstable over uneven terrain where the sudden changes affects its handling. All
Covenant vehicles are made from a purple or dark blue type of metal, and all Covenant vehicles are nicknamed after some kind
of supernatural entity by the UNSC, except for Scarabs and Locusts. The reason behind this form of naming is not known. Recently, Brute vehicles and technology have been incorporated into
the Covenant's arsenal. Though more primitive, they serve the Brutes' need for power. Brute vehicles are not named after spiritual
entities, and rather than being a series of Covenant vehicles are regarded as native Jiralhanae technology.