MJOLNIR Powered Assault Armor
The MJOLNIR Powered Assault Armor System (pronunciation:ˈmjɔːlnɪər, myol-neer) is a technologically advanced combat exoskeleton system designed to vastly improve the strength, speed, agility, reflexes and durability of a Spartan supersoldier.
Created parallel to the SPARTAN-II Program by the Office of Naval Intelligence's Materials Group, the MJOLNIR armor is the most advanced piece of tactical military hardware in human hands. Each suit alone costs as much as a small starship. Ostensibly the brainchild of Dr. Catherine Halsey, MJOLNIR is an attempt to create a powered exoskeleton capable of taking full advantage of the physical capabilities of a Spartan. MJOLNIR's development actually came about due to a millennia-old geas that manifested itself within Halsey. Near the end of the Forerunner-Flood war, the Librarian planted genetic directives that would lead to the development of powered armor, along with the creation of the Spartans and sophisticated artificial intelligence. This was done in preparation for the Didact's return, when he would again attempt to enslave humanity.
Spanning over three decades of development, project MJOLNIR encompassed more then just a suit of armor, but as a pioneering effort intended to shatter current technological barriers. In its final iteration, MJOLNIR is a highly advanced suit capable of further enhancing the Spartans' physical performance while also doubling as a platform capable of handling an artificial intelligence network.
Unlike the powered exoskeletons that preceded it, the MJOLNIR battlesuit was designed from the ground up as a suit of armor; its design philosophy would serve as a basis for all future powered and semi-powered armor system designs. Each generational version of the MJOLNIR battlesuit is composed of major fundamental components; construction of the suit is done in overlapping layers and has been remarked of it being akin to a giant three-dimensional puzzle. The armor's shell is composed of a multilayer alloy of remarkable strength and has been augmented with a refractive coating capable of dispersing a limited amount of Covenant energy weapon strikes. The suit contains a gel-filled layer underneath a thick black armored bodysuit. The gel layer regulates temperature and can reactively change its density. The inner skinsuit is made of a moisture-absorbing synthetic material linked to an environment control computer and the occupant's UNSC-issue neural interface.
The battlesuit is a sealed system, capable of extra-vehicular activity for a limited amount of time or operations in toxic atmosphere. It is hardened against EMP and radiation, and has filters that are completely effective at removing toxins and bacteria from local atmosphere. Between the external armor and the internal padding is the most devastating weapon the suit carries: a layer of polymerized lithium niobocene, a liquid metal crystal that deforms along a preferred axis when exposed to a electric charge. Woven by molecular tools into a capillary system, this layer is amorphous, yet amplifies force, doubling lifting capability and increasing reaction time by a factor of five. Because the MJOLNIR system is so reactive, it can only be worn by a physically augmented human; ordinary people are unable to use the suit without injuring themselves.
The MJOLNIR battlesuit's greatest advantage, however, is a superdense optical computer memory. This revolutionary solid-based crystalline layer forms a network within the suit's frame of proper size and capability of housing the types of artificial intelligence usually reserved for starships. Essentially a piggyback system, an AI can be delivered to the suit via a data crystal chip storage device no larger than a personal credit card. The AI's personality and processing matrices can be carried by the armor and in conjunction with the user, can neurally link with a being that has nearly unfettered control over mathematics, information and body control. Such technology did not exist when work began on the Mark I prototypes.
The functionality of the MJOLNIR system is unprecedented. Rather than being a traditional suit of body armor, the MJOLNIR battlesuit works on a biomechanical level, allowing for direct user-controlled movement. Each human being has a molecular fiber network called the nervous system within their brain. Upon induction, all military personnel are issued a neural interface, which is implanted at the base of the skull and cannot be removed. SPARTAN-IIs receive a modified version of the neural lace specifically for the MJOLNIR armor. This neural lace, which consists of two core processor chips which is linked to receptors in the subject's brain, which is connected to a interface connection at the rear of the skull; reads the electrochemical signals sent from the brain and then translates these chemical signals into digital code. As the electrochemical impulse travels down the axon to the muscle, the digital code is routed through the interface connection, to the suits on board sensors, the input from the sensors is then read by the onboard computer and then like the human body itself sends an electrical impulse through the suit, as the impulse from the motor neuron hits the muscle, the electrical impulse from the suit causes the polymerized lithium niobecene to deform along a preferred axis, overlapping each other more, so that the layer gets shorter and fatter. When the impulses from the suit stop, the polygonal pieces slide back to their original positions. At the same time, as the muscle fibers are responding to the impulses, signals are sent to the suit that this is occurring, as the muscle twitches the force being applied to the suit is accelerated through force-multiplying circuits, which amplify the force of the muscular twitch by a positive feedback loop in the armor. The end result is a fully neurally linked machine, the user's thoughts move the suit and in return the suit moves the user. The synthesis of machine and mind is so fast that it is almost impossible to chart reaction time.
The suit also possesses other features that enhance its wearer's abilities. It has numerous clips, belts, and magnetic holsters for the attachment of additional weapons and ammunition; an advanced heads-up display (HUD), linked to sensors in the gloves which can detects the type of weapons and devices held, and to project shield strength, ammunition count, a targeting reticule, waypoints, a radio uplink for communication, health monitoring and restoration system, regenerative food materials and other helpful data.
In its final phase, the MJOLNIR battlesuit weighs half a ton, or one-thousand pounds, and is a fully neural-linked system. With an on board AI using the human mind for parallel processing, the SPARTAN/MJOLNIR combination is designed to be the most devastating intelligence tool ever created.
The armor line is named for the mythical weapon Mjølnir, the hammer of Thor, the Norse god of lightning, thunder, wind, and rain. It is said that Mjölnir had the power to level mountains, and the name "Mjolnir" roughly means "to strike."
 Armor generations
Before Dr. Halsey began Project: MJOLNIR, the Materials Group had been evaluating the combat potential of powered exoskeletons for at least eleven years, producing three distinct exoskeleton models: the Mark I, the Mark II, and the Mark III. When Dr. Halsey and the Materials Group abandoned the exoskeleton project for MJOLNIR, they ceased using the "Mark" generational naming system, as Halsey intended for MJOLNIR to be a single, continuously upgraded system, and wished to distance herself from the unsuccessful exoskeleton project. However, in 2535, the Office of Naval Intelligence mandated that the "Mark" system be used to distinguish different versions of the MJOLNIR Powered Assault Armor as a means of fiscal oversight. Though Halsey disliked the system, she agreed to produce the MJOLNIR armor in distinct stages rather than through incremental improvements; the original version of MJOLNIR was thus retroactively named "Mark IV", referencing the long-abandoned exoskeleton project that had preceded MJOLNIR.
After the end of the Human-Covenant War, the Materials Group developed the second system-wide generation of MJOLNIR, simply designated GEN2, as a response to the SPARTAN-IV project. The GEN2 is lighter than the Marks IV through VI and is far more modular than previous systems. The previous iterations of MJOLNIR were retroactively designated GEN1 to distinguish them from the GEN2.
 Prototype exoskeletons
 Mark I exoskeleton
Initiated in 2500, the Mark I was one of ONI's first experiments with powered exoskeletons. More human-powered defense structures than suits, the Mark I took ten years to develop, but was bulky, unwieldy and needed to be tethered to a power source due to the tremendous amount of energy needed to power it. This caused the system's downfall, as it required a physical connection to a fusion generator which hindered movement. The Mark I prototype exoskeleton improved the strength and stamina of the wearer and allowed the user to lift two tons (4,000 pounds) and run at 32 km/h (19.88 mph) for extended periods of time. The Mark I contained a cutting-edge onboard computer that could assist the wearer by transmitting tactical and communications information to the standard neural implant issued to a soldier, though the suit did not possess the ability to carry an AI. The armor could also be equipped with motion sensors and infrared scopes, and it could be mounted with a 30mm minigun that fired on self-targeting armatures.
Research and development for the Mark I was carried out at Section Three's headquarters inside CASTLE Base on Reach, though the final assembly of components occurred at the Damascus Materials Testing Facility on Chi Ceti IV. At least forty Mark I suits were produced; although they never saw battlefield deployment, many were converted to carry heavy equipment in docking bays, and dozens of others were dumped into Reach's titanium mines. The Mark I exoskeletons were later used by trainers of the SPARTAN-IIs to protect themselves against the Spartans' newly acquired strength. Otherwise, the training could have killed them, as evidenced when three trainers were accidentally killed during hand-to-hand combat exercises against the Spartans.
 Mark II exoskeleton
The Mark II exoskeleton was similar to the Mark I, but it had a slimmer profile which greatly increased mobility. However, the suit still needed to be tethered to a fusion generator, so despite being the most powerful piece of military hardware of its time, it was still impractical for battlefield deployment. The Mark II included a refractive coating to help disperse heat from explosive attacks and better self-sealing systems in the event of damage while the unit was in vacuum.
 Mark III exoskeleton
Introduced in 2510, the next prototype, the Mark III, incorporated a wireless power transmitter and receiver so that power could be transmitted directly to it, much like the orbital defense platforms used to defend UEG colonies. This design was quickly rejected for two reasons: first, the armor still had a limited operational range as it had to remain within range of a bulky, immobile generator. Second, if the generator was disabled or destroyed, the suit would be disabled, leaving its user trapped inside a useless shell, helpless against enemy attacks. In the end, all of the first three prototypes had one thing in common: It was impractical on the battlefield, as its range was severely limited by the lack of a mobile power source.
 Powered assault armor
 First generation
 MJOLNIR Mark IV Powered Assault Armor
- Main article: MJOLNIR Powered Assault Armor/Mark IV
Although earlier attempts at developing high-powered armor produced designs that were impractical for battlefield deployment, the Mark IV MJOLNIR powered exoskeleton would be the first successful powered armor system that saw deployment onto the battlefield. Developed by Dr. Catherine Halsey, the MJOLNIR Mark IV was a radical redesign of powered exoskeletons making use of technological innovations that did not exist when work on the previous exoskeletons began, such as a miniature fusion reactor embedded in later versions of the armor. The Mark IV MJOLNIR armor was fielded November 27, 2525 to November 24, 2551.
 MJOLNIR Powered Assault Armor/Black
- Main article: MJOLNIR Powered Assault Armor/Black
Created by a top-secret parallel development lab in Seongnam, Korea, MJOLNIR: Black was a standalone "skunkworks" prototype of the Mark VI MJOLNIR Powered Assault Armor issued exclusively for Team Black. It features a number of advances over even the then-current generation MJOLNIR exoskeletons. It was used on Verge during the Covenant invasion of the Epsilon Eridani system and Operation: BLOWBACK some time after.
 MJOLNIR Mark V Powered Assault Armor
- Main article: MJOLNIR Powered Assault Armor/Mark V
The MJOLNIR Mark V is the first major upgrade of the system and introduced two revolutionary technologies for battlefield purposes: energy shielding reverse-engineered from Covenant technology, providing the user added protection against plasma weapons, and the ability to link a soldier and an AI together to provide the soldier instant intel in the field, along with other functions. In addition to major changes from the Mark IV, hundreds of other technical improvements are incorporated into the Mark V: for example, the fusion packs used to power the suits are half the size of their predecessors. The Mark V was fielded November 24, 2551 to October 20, 2552.
 MJOLNIR Mark VI Powered Assault Armor
- Main article: MJOLNIR Powered Assault Armor/Mark VI
The MJOLNIR Mark VI is the third primary version of the MJOLNIR system. It introduces several technical improvements while refining advanced technologies introduced in the previous system. The first improvement made to the system is a faster recharge time on the suits' energy shield system so that the SPARTAN-II super soldier does not have to remain in cover for an extended period of time. The second is improved synchronization between the suit and user, this allows the SPARTAN-II to jump higher, run faster, and hit harder than a Spartan could previously. In addition, a SPARTAN-II wearing the Mark VI no longer need medical kits, as the armor has an intergrated biofoam injector.
 Second generation
- Main article: MJOLNIR Powered Assault Armor (GEN2)
The MJOLNIR Powered Assault Armor/GEN2 is a program-wide overhaul of MJOLNIR developed for the SPARTAN-IVs. The GEN2 suit is lighter than the previous iterations. It is equipped with new ad hoc modification systems which gives the armor the ability to use tactical packages, support upgrades, and armor abilities. The GEN2 is produced by half a dozen manufacturers, both within the military and among private contractors.
 MJOLNIR Mark VII Powered Assault Armor
- Main article: MJOLNIR Powered Assault Armor/Mark VII
The Mark VII is the seventh iteration of the MJOLNIR armor, apparently part of the second generation.[note 1] It was introduced after the end of the Human-Covenant War, and was equipped on at least one SPARTAN-II supersoldier, namely Naomi-010, in late January 2553. The seventh-generation MJOLNIR set is lighter than the Mark VI and is produced by a "new supplier", suggesting that it was developed outside the Materials Group. The Mark VII is equipped with nanotechnology that can repair and upgrade the armor without any outside influences.
Decades before the development of the Mark VII, the seventh generation was proposed as a theoretical upgrade to the MJOLNIR system. Dr. Halsey outlined what features and technology would be included in her personal journal. It would appear to be the last planned phase of the MJOLNIR project. The Mark VII would have utilized a power system that made use of a combination of plasma and fusion technology, integrated atmospheric insertion capabilities, slipspace de-insertion capability, active AI transfer protocols, and limited shaping of energy shield.
"Atmospheric insertion" would allow a Spartan to free-fall from space without a re-entry vehicle such as the SOEIV, but would most likely require a drag chute or parachute. "Slipspace de-insertion capability" means that a Spartan would be able to exit a vessel travelling in slipspace and re-enter normal space, similar to the Long Range Stealth Orbital Insertion Pod. Halsey described "limited shaping of the energy shield" as the ability to form "partial overlaps, airfoils, etc."
 Armor components
 Inner components
- Inner skinsuit:
The inner skinsuit is made of a moisture-absorbing synthetic material linked to an environmental control computer and the occupant's neural interface. It controls the suit's temperature and actively changes how the suit fits the user.
On top of the inner skinsuit is a gel-filled layer, which regulates the temperature of the suit and can change its density to conform to the wearer's shape. The temperature inside the suit is controlled by the moisture absorbing cloth suit underneath the hydrostatic layer. The hydrostatic gel layer can also be pressurized to various levels to potentially save the wearers life should the wearer be subjected to high G forces or a high velocity impact; however, over-pressurizing this layer can cause nitrogen embolisms.
Fitted in between the outer plates and the inner padding, is a layer of liquid crystal within a piezoelectric material that deforms along a preferred axis when exposed to an electric charge. This layer acts as a sheath or a suit artificial muscle; this reactive piezoelectric effect increases the strength, reaction time, mobility, speed, and all around physical performance of the suits user. The material is amorphous, which circumvents a major obstacle in its design: custom fitting millions of the polygonal pieces under the second armor layer. Knitted together at a molecular level the liquid crystal material is merely "poured" into a multilayered Sierpinski capillary system where microelectric fields can direct crystallization geometries. The only downfall is the materials production, which involves classified super-toxic precursor materials and requires a zero-gravity environment. As such this layer accounts for over eighty percent of the MJOLNIR armor's cost of construction and materials.
The pressure seal is a vital component to the MJOLNIR system, it keeps the system airtight, underwater or in space. The seal is very strong but will only break under extreme pressure, such as in a high velocity impact or when the hydrostatic gel has been over-pressurized.
- Titanium nanocomposite bodysuit:
Sandwiched between the external armor and the internal padding is a thick black armored bodysuit. This suit has numerous functions, small but vital to the safety and survival of the wearer. The bodysuit is made of a titanium-based material, making it very strong and yet very flexible. It also serves as another layer of protection against ballistics attacks and is coated with a heat resistant material to disperse heat from plasma weapons.
- Biofoam injectors:
Introduced on the Black model and Mark VI, biofoam injectors is an integral part of the systems ability to keep a SPARTAN-II functioning in battle. Biofoam is a medical gel that is used to fill and seal a wound automatically, it is also used to treat any infection that could occur as a result of the wound. The process of injecting, or applying the gel to a wound is extremely painful and is only a temporary solution; medical attention must be sought soon after to ensure survivability.
Located throughout the armor, these systems boost the force applied by the user. They make hand-to-hand combat easier, but also make the armor difficult to adjust to; a slight motion can be translated into a potentially harmful one if not conducted correctly. For this reason it is only possible for Spartans to use this armor, as their strengthened bodies are able to withstand the increased power and speed of movement, which, in un-augmented human bodies, results in broken bones or death, due to spasms caused by the pain of broken bones.
Reactive Circuits are systems installed directly linked to the SPARTAN neural interface. They amplify the wearer's reaction time by connecting directly to the thoughts of the wearer, making it much easier to control and allowing for the soldier to be both more efficient and have a higher survival rate in combat.
- Lock-down system:
 Outer components
The outer shell of the MJOLNIR armor is comprised of a fairly thick titanium alloy. This alloy is very resilient, can take significant punishment, and is nearly impervious to small arms fire. While enough shots from armor piercing rounds will breach the outer shell, the suit can take a few glancing blows from them without compromising the armor. The outer shell of the MJOLNIR suit is covered with a refractive coating to help disperse the heat experienced from Covenant energy weapons. However one or two direct hits from any Plasma weapon will compromise the armor plating.
- Integrated communications helmet:
The MJOLNIR helmet is one of the most vital aspects to the MJOLNIR armor system. It is made of titanium and features a heads-up display, that links to the brain and hands, and can identify equipment and display information about it when it is picked up by the wearer. A environmental control unit that includes filters to remove toxins from the atmosphere, and a rebreather to automatically supply oxygen to the wearer during EVA. In addition the helmet is packed with thermal and motion sensors, communications, solar-powered lighting, and imaging and video gear.
The most important feature though, is the direct neural interface system which connects to a SPARTAN-IIs neural implants. Two core processor chips are implanted into the subjects skull in the rear of the head. This is essentially comparable to an on board computer using parts of the human brain for processing - when the connector at the rear of the subject's head and receptors in the brain link to the helmets on board sensors it creates the neural link needed to move the MJOLNIR suit.
- Titanium alloy outer shell:
The outer shell of the MJOLNIR armor is comprised of a fairly thick titanium alloy. This plating covers the chest, arms, hip, legs, calves, feet and hands. This alloy is very resilient, can take significant punishment, and is nearly impervious to small arms fire. While enough shots from armor piercing rounds will breach the outer shell, the suit can take a few glancing blows from them without compromising the armor. The outer shell of the all MJOLNIR suits is covered with a refractive coating to help disperse the heat experienced from Covenant energy weapons. However one or two direct hits from any plasma weapon will compromise the armor plating.
- Memory processor superconductor layer:
Introduced with the Mark V, that is capable of housing an AI. Comprised of the same material as a starship's AI system, this layer allows an AI to travel with a soldier into the field. The AI can then aid the soldier in software inrtusion, hardware hacking, and espionage by listening to enemy chatter.
- Magnetic weapon holder strips:
Available on the Mk. IV, Mk. V, and Mk. VI, the magnetic strips are very small yet powerful magnets place on the legs, waist, and back of the suit and is used to hold any equipment with a magnetic property. The suit also contains an electromagnetic system on the boots of the MJOLNIR suit that allow its wearer to stay attached to a metal surface in Zero G environments and can be toggled on or off by the wearer.
Unsuccessfully tested with the Mark IV, properly introduced with the Mark V, and later refined with the Mark VI, the energy shield device is reversed engineered from Covenant technology. In 2532, forty scientists and technicians would spend the next 20 years attempting to make some use of the technology. For decades the attempts at cracking their technology had met with failure after failure, some had given up and others in the scientific community believed the energy shield technology could never be cracked. However at some point in the late 2540s a breakthrough was made and for the first time the UNSC had successfully cracked and improved upon the technology.
- Fission reactor:
Integrated in the limited production model of the MJOLNIR PAA the nuclear fission reactor was the MJOLNIR armors source of power, the reactor was built into the suit and allowed for unlimited power. However because of the delicacy and radioactive nature of the fission reactor its use was limited until it was replaced with a micro-fusion plant in the final production model of the Mark IV in 2535.
- Microfusion reactor:
Integrated in the final production model of the Mark IV in 2531, the microfusion cell is the most vital component to the MJOLNIR system, as it provides power to all components of the MJOLNIR armor. The reactor is built into the suit and allows for nearly unlimited power. The fusion reactor in all versions of the MJOLNIR armor is half the size of a normal fusion pack that conventional marines carry around.
The power supply control unit controls the power supply of the armor.
This system functions as a self-destruct mechanism in order to prevent a dead Spartan's armor from being compromised by hostiles. It is activated by a series of digits that only the Spartans know. When engaged, it produces a reactor overload that burns everything within a ten-meter radius, then produces a large blast.
- Armor components developed alongside Project: MJOLNIR were later applied for use with other UNSC armor systems as well. This is the case with ODST armor, which uses technology developed for MJOLNIR. Similarly, a specialized "Recon" variant of the ODST armor, used exclusively by ONI operatives, utilizes a similar helmet as the Recon variant of the MJOLNIR armor.
- In the Halo 3 public Beta, a Spartan's face was visible under the helmet's visor which could be seen by positioning a player a certain distance away from a Mongoose, and using the camera to view under the model. However, Bungie stated later that this was an Easter Egg Bungie made and that the face seen on the Beta was in fact modeled from the face of Marcus Lehto, a Bungie employee.
- McFarlane Toys has produced Halo figures with interchangeable head, chest, and shoulder armor. The hands are also interchangeable, but aside for color effect, this will only matter with the release of the left gun hand released in February 2009, which allows the Spartans to dual-wield a weapon.
- The Limited Edition of the Xbox 360 action RPG Fable II includes a set of MJOLNIR armor for the player's character to wear. It is called "Hal's Armor/Outfit". Additionally, the player can obtain a longsword with a crystal blade carved in the shape of the plasma envelope of the Energy Sword called "Hal's Sword". The name 'Hal' (obviously derived from 'Halo') is described in-game as the name the citizens of Albion gave to a mighty hero from another world. Also in the downloadable Knothole Island add-on, in the "Box of Secrets", the player can unlock 'a rare ranged weapon', "Hal's Rifle", which is an assault rifle.
- In Halo: Combat Evolved, the Master Chief has the initials 'MLR' engraved below his MJOLNIR Mark V boot. This can be best seen in multi-player if a player stands on one another.
- The MJOLNIR Mark VI was rated #13 in The 14 Most Badass Video Game Power Suits, a feature by Maxim.com.
- The Delta-6 Accelerator Suits in the film GI Joe: The Rise of Cobra seem to be inspired by the MJOLNIR suit. In addition to its very similar appearance, the Delta-6 accelerates the wearer's speed, enhances their strength and agility, and has a "thought-to-action" feature. Stuart Beattie, the film's screenplay writer, is an avowed Halo fan and has written multiple unendorsed scripts for a Halo film.
A redux of the MJOLNIR Mark V as seen in the Art of Halo 3.
Cut concept art of the MJOLNIR Mark IV for Halo Wars.
A concept render of Hal's armor for the collector's edition of Fable 2.
 List of appearances
- ^ It has not been officially stated that the Mark VII is part of the GEN2 product line. However, Naomi remarks that the Mark VII is lighter than the Mark VI and comes from a different manufacturer, suggesting that it is part of GEN2, or that Mark VII and GEN2 are synonymous.
- ^ Halo Waypoint -Halo 4 Armor
- ^ a b Halo: Combat Evolved PC Strategy Guide, page 5
- ^ Halo 4, campaign level Reclaimer
- ^ a b c d e f g h i j k l m n o p Halo Encyclopedia, page 88
- ^ Halo: The Fall of Reach page 116 (2001 edition), page 133 (definitive edition) page 138 (2010 edition)
- ^ a b c d e f g h i j k Xbox.com: MJOLNIR armor overview (archived)
- ^ a b Halo: The Fall of Reach, page 114-115 (2001 edition) page 131 (definitive edition) page 137 (2010 edition)
- ^ a b c d Dr. Halsey's personal journal September 1, 2525
- ^ a b c d e Halo: The Fall of Reach, page 115 (2001 edition) page 132 (definitive edition) page 137 (2010 edition)
- ^ a b Dr. Halsey's personal journal June 30, 2525
- ^ a b c Halo Encyclopedia, page 89
- ^ Halo: The Fall of Reach, page 118, (2001 edition) page 135, (definitive edition) page 140 (2010 edition)
- ^ a b c Dr. Halsey's personal journal July 30, 2511
- ^ Halo: The Fall of Reach, page 2, (2001 edition) page 3, (definitive edition) page 16 (2010 edition)
- ^ a b c Dr. Halsey's personal journal January 7, 2535
- ^ a b Halo 4: ORDNANCE + ARMOR
- ^ a b Halo 4 Official Site: GAMEPLAY
- ^ a b c Halo: The Fall of Reach, page 71, (2001 edition) page 81, (definitive edition) page 90 (2010 edition)
- ^ a b Halo: The Essential Visual Guide, page 44
- ^ Bungie.net: Bungie Weekly Update: 01.29.10
- ^ Halo: Glasslands, page 291
- ^ Halo: Glasslands, page 213
- ^ Halo: First Strike page 13 page 20 (2010 edition)
- ^ Halo: Ghosts of Onyx page 36
- ^ Halo: First Strike, page 19, page 31 (2010 edition)
- ^ a b c Halo Encyclopedia, page 90
- ^ Halo 3, level Arrival
- ^ Halo Encyclopedia, page 91
- ^ Halo: Reach, level Tip of the Spear
- ^ Halo: The Fall of Reach, page 252, (2001 edition) page 292, (definitive edition) page 286 (2010 edition)
- ^ Halo: The Essential Visual Guide, page 119: "Energy shielding was a key feature of Mark V, although other Spartan squads had field-tested prototypes of this technology as early as 2531." The Grenadier variant, introduced four years later, also served as a test bed for energy shielding.
- ^ Halo: The Fall of Reach, page 249 (2001 edition) page 289, (definitive edition) page 283-284 (2010 edition)
- ^ Halo: Ghosts of Onyx page 45
- ^ Halo: The Fall of Reach, page 114, (2001 edition) page 131 (definitive edition) page 137 (2010 edition)
- ^ Halo: First Strike, page 315, page 377 (2010 edition)