MJOLNIR Powered Assault Armor

John-117 in his Mark VI Mjolnir armor

"Project MJOLNIR will make the Spartans into something . . . new. Something I could never forge them into. I can’t fully explain — that damned ONI spook is still here listening — just trust Dr. Halsey."

— CPO Mendez to John-117 about final phase of Spartan training

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. Though the development program is rendered in all capital letters (i.e. Project: MJOLNIR), the armor itself is called Mjolnir. The suit is named after the hammer of Thor in Norse mythology.

Overview

The Mark V MJOLNIR armor.

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. 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 is considered by the Librarian to be the fulfillment of a millennia-old geas she had implanted in humanity a hundred millenia earlier, intended to help them reclaim the Mantle.

Spanning over three decades of development, Project MJOLNIR encompassed more than 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 generation 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 an 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 super-dense 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 received 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 an 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 suit's 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 reticle, 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 short ton, or 1,000 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.

Armor generations

Before Dr. Halsey initiated Project MJOLNIR, the UNSC Navy had developed various designs and prototypes for powered exoskeletons and armour systems, including the Mark I exoskeleton, the Mark III exoskeleton, ORION armor, and HRUNTING Mark I. In 2510, Halsey inspected much of this previous work while performing a program review of Project HRUNTING on behalf of ONI. She judged HRUNTING to be an "interesting failure" for its lack of innovation, and inability to exploit recent technological breakthroughs. Later, during the early stages of planning for Project: MJOLNIR, Halsey would ultimately choose to start from scratch, due to both the limitations inherent in the previous antiquated designs, and an unwillingless to shoulder the administrati