Canon

EOD-class Mjolnir

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EOD
GEN2
H4 MJOLNIR EOD.png
GEN1 Mark VI
HTMCC H3 EOD Crop.png
GEN1 Mark V
HR EOD Helmet.jpg
Production overview

Manufacturer(s):

Materials Group (GEN1)[1]
Naphtali Contractor Corporation (GEN2)[2]

Testing site(s):

Damascus Testing Facility (GEN1)[1]
Buffalo Breaker Yards (GEN2)[2]

Type:

MJOLNIR (GEN1)

MJOLNIR (GEN2)
MJOLNIR (GEN3) (Compatible)

Role(s):

Explosive ordnance disposal

 

EOD-class Mjolnir (Explosive Ordnance Disposal), also designated as the MJOLNIR Powered Assault Armor/EOD variant,[3] is a MJOLNIR armor variant originally designed by Materials Group,[1] with the GEN2 version being manufactured by the Naphtali Contractor Corporation.[4]

GEN1 overview

Design details

The helmet was designed to channel the pressure wave of a nearby detonation around the user's head, significantly reducing the likelihood of decapitation in the event of an explosion.[3] The MJOLNIR/EOD variant's pauldrons and chest plate were designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment and protecting Spartans during operations that involve the handling of explosive ordnance (e.g., clearing/planting land mines, demolishing enemy structures/material and, or planting/defusing bombs).[5][6] The helmet can be fitted with the AN/PZY-6011Y TYPHON and AN/PCK-221 FARNDALE Command Network Modules, the Type E3 UA module and a CBRN module.

Development history

The MJOLNIR/EOD variant was originally created at the UNSC Damascus Materials Testing Facility on Chi Ceti 4. The EOD variant is speculated to have been developed in response to the death of Samuel-034 (the first Spartan killed in action) in November 2525.[7] As late as 2558 the GEN1 version of the EOD helmet could be requisitioned by Spartan Operations personnel for use with their GEN2 Mjolnir suits.[8] With the advent of the GEN3 Mjolnir in 2559, the GEN1 EOD helmet was upgraded to be compatible with it.[9]

  • The Mark IV EOD armor worn by James-005 during the Battle of Sigma Octanus IV.

    The Mark IV EOD armor worn by James-005 during the Battle of Sigma Octanus IV.

  • The Mark V variants of the EOD helmet.

    The Mark V variants of the EOD helmet.

  • The Mark VI EOD Variant.

    The Mark VI EOD Variant.

  • GEN2 compatible Mark V variant

    GEN2 compatible Mark V variant

Usage

EOD is fielded by Spartans deep in enemy lines, allowing them to navigate dangerous territory to disable or destroy enemy mines before the UNSC properly arrived.[1] In the post-war era, the GEN1 EOD set, specifically the helmet, is still favored by Spartan combat divers and pioneers tasked with demolition roles.[8]

GEN2 overview

Design details

The helmet has a pressure-resistant hardened rebreather unit. The reactor has alternating heat-tempered balance drives. The pauldrons are flow-distributing ceramic plates.[2] The GEN2 kit also includes anterior torque couplings.[10]

Development history

In 2554, Abilene's Naphtali Contractor Corporation took control over the EOD armor's production,[4] and adjusted the systems plate configuration to reduce the potential for dismemberment during explosive ordnance activity and facilitation.[11] It was tested at the Buffalo Breaker Yards. They proposed numerous enhancements to the armor's systematic approach to the GEN2 framework.[2]

In-game information

Halo 3 - Mark VI GEN1

The EOD armor permutation is unlockable in Halo 3. In the Halo: The Master Chief Collection edition of Halo 3, the EOD armor (like all Halo 3 permutations) is unlocked by default.

The Bungie Armor is a slight variation of the EOD chestpiece. Bungie Armor lacks the three mid-level lights and has an effect that causes flames to appear around the helmet.

Armor Description Unlock requirements
(Halo 3) 		Unlock requirements
(Halo: MCC)
HTMCC H3 EOD Menu Render.png
EOD 		Helmet: The Mjolnir/EOD variant was created at UNSC facilities on Chi Ceti 4. The helmet was designed specifically to channel the pressure wave around the user's head, significantly reducing the likelihood of decapitation. Unlock the Campaign Complete: Legendary achievement. Unlocked by default.
Shoulder: Developed at the UNSC Damascus Materials Testing Facility on Chi Ceti 4, the Mjolnir/EOD variant was designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment. Complete The Ark on Legendary difficulty.
Chest: This variant was designed specifically to protect Spartans during operations involving the handling of explosive ordnance (e.g., cleaning/planting land mines, demolishing enemy structures/materiel). Complete Tsavo Highway on Legendary difficulty.
MCC: EOD helmets were designed to significantly reduce the likelihood of decapitation. N/A

Halo: Reach - Mark V GEN1

The EOD helmet returns in Halo: Reach, though it features some minor different aesthetics than the Mark VI EOD helmet seen in Halo 3. All EOD helmet variants can be unlocked in the Halo: Reach's Armory through the game's purchase system via the use of cR. In Halo: The Master Chief Collection, the EOD helmet variants are attainable in the Season 1: Noble progression system.

The default EOD helmet features the CBRN module, which is also available for the Security and GUNGNIR helmets.

Armor Description Unlock requirements
(Halo: Reach) 		Unlock requirements
(Halo: MCC)
HR EOD Helmet Icon.png
EOD helmet 		Developed at the Damascus Materials Testing Facility on X Ceti 4; entered service in 2531.
Designed specifically to reduce likelihood of decapitation. 		Halo: Reach rank icon Sergeant, 15,000 cR Series 1 Tier 29, Spartan Point 1
HR EOD CNM Helmet Icon.png
EOD (CNM) 		Command network module; standard issue to UNSC Special Forces unit commanders. Halo: Reach rank icon Sergeant, 5,000 cR Series 1 Tier 29, Spartan Point 1
HR EOD UAHUL Helmet Icon.png
EOD (UA/HUL) 		Up-armored variant with hardened uplink module for MILINT acquisition. Halo: Reach rank icon Sergeant, 3,000 cR Series 1 Tier 29, Spartan Point 1

Halo 4 - GEN2

EOD was one of the armor permutations to return, albeit completely redesigned for GEN2, in Halo 4. In The Master Chief Collection, the EOD set and its alternate Shadow (SHDW) variant are available by default.

Armor Description Unlock requirements
(Halo 4) 		Unlock requirements
(Halo: MCC)
EOD armor in Halo 4 with no skin.
EOD 		Description (H4): Abilene's NCC took over production of this Mjolnir kit in 2554. Achieve Spartan Rank 45.
 Unlocked by default.
Helmet description (MCC): NCC took over production on this helmet in 2554.
Shoulders description (MCC): Modular left/right spaulder from EOD-class armor.
Chest description (MCC): Underwent field trials at the Buffalo Breaker Yards.
EOD armor in Halo 4 with SHDW skin.
EOD Shadow (SHDW) skin 		Description (H4): Customized with SHADOW armor skin. Complete the Regicide Victory - Master commendation. Unlocked by default.
Helmet description (MCC): EOD helmet customized with SHADOW coating.
Shoulder description (MCC): EOD left/right spaulder customized with SHADOW coating.
Chest description (MCC): EOD chassis customized with SHADOW coating.

Halo 5: Guardians - Upgraded GEN1

The Mark V EOD helmet was one of a number of Reach-themed helmets and armors added into Halo 5: Guardians via the Classic Helmet REQ Pack.

Helmet Description Unlock requirements
(Halo 5: Guardians)
H5G REQ Helmets EOD Rare The unique combination of safety and life support features in the EOD helmet make it an optimal choice for Spartan assault divers and pioneers who undertake demolition roles. That it also mitigates the risk for decapitation is a bonus.

Halo Infinite - Upgraded GEN1

Mark V EOD was added during Season 05: Reckoning.

Helmet Manufacturer Lore Rarity Unlock Requirements
HINF EOD Helmet Icon.png
EOD 		Materials Group Still used in explosive situations where a Spartan needs to keep a good head on their shoulders. Epic Season 05: Reckoning Battle Pass level 15 (Free)
Optical filters and hardened sensors used for direct observation of exotic radiation bursts, such as those produced by NOVA detonations.
FC/ALFA 		Materials Group Optical filters and hardened sensors used for direct observation of exotic radiation bursts, such as those produced by NOVA detonations. Epic Season 05: Reckoning Battle Pass level 28 (Premium)

Attachments

Non-canon and dubious canon appearances

Silver Timeline

Main article: Silver Timeline

An EOD helmet is worn by Vannak-134 during battles against the Covenant.[12]

Trivia

  • During the Halo: Reach Multiplayer Beta, the final model for the GUNGNIR shoulder pauldron was designated as the EOD shoulder pauldrons, and costed 1,000 cR.[13]
  • The Caduceus emblem that appears on the Mark V EOD helmet also appears on med packs, Army medics, and the Tactical/Trauma Kit armor permutation. This suggests that the EOD may also have an intended secondary role to provide medical assistance to wounded allies in dangerous situations. It's possible that there may be a non-MJOLNIR variant of the helmet for use by UNSC medical personnel, likely in toxic environments where the distinctive CBRN would aid in operations.

Gallery

Main-Superintendent.png Browse more images in this article's gallery page.

Halo 3

  • Original render of the Mark VI EOD helmet.

    Original render of the Mark VI EOD helmet.

  • Halo 3 concept art for the EOD.

    Halo 3 concept art for the EOD.

  • A Spartan in EOD on Last Resort.

    A Spartan in EOD on Last Resort.

  • A Spartan clad in full EOD armor.

    A Spartan clad in full EOD armor.

  • Mark VI EOD as rendered in the menu in Halo: The Master Chief Collection.

    Mark VI EOD as rendered in the menu in Halo: The Master Chief Collection.

Halo: Reach

  • Various concepts for the Mark V EOD helmet.

    Various concepts for the Mark V EOD helmet.

  • A render of an EOD helmet, found via a glitch in the Halo: Reach Beta.

    A render of an EOD helmet, found via a glitch in the Halo: Reach Beta.

  • The base EOD helmet in the Armory.

    The base EOD helmet in the Armory.

  • Render of a Spartan wearing the EOD helmet, alongside a Sangheili Ranger.

    Render of a Spartan wearing the EOD helmet, alongside a Sangheili Ranger.

  • A customized Noble Six wearing EOD armor during a cutscene on Long Night of Solace.

    A customized Noble Six wearing EOD armor during a cutscene on Long Night of Solace.

  • EOD helmet with CNM attachment.

    EOD helmet with CNM attachment.

  • Up-armored EOD helmet with HUL attachment.

    Up-armored EOD helmet with HUL attachment.

Halo 4 and Halo Online

  • Concept art of the MJOLNIR GEN2 EOD armor for Halo 4.

    Concept art of the MJOLNIR GEN2 EOD armor for Halo 4.

  • A Spartan-IV wearing GEN2 EOD on Impact.

    A Spartan-IV wearing GEN2 EOD on Impact.

  • The GEN2 EOD in Halo Online.

    The GEN2 EOD in Halo Online.

  • The helmet and chestpiece of the GEN2 EOD armor in Halo Online .

    The helmet and chestpiece of the GEN2 EOD armor in Halo Online .

Halo: 5 Guardians

  • A Spartan-IV wearing GEN1 EOD.

    A Spartan-IV wearing GEN1 EOD.

  • A Spartan-IV wearing GEN1 EOD.

    A Spartan-IV wearing GEN1 EOD.

  • A Spartan-IV wearing the GEN1 EOD helmet on Escape from ARC.

    A Spartan-IV wearing the GEN1 EOD helmet on Escape from ARC.

Halo Infinite

  • Concept art of GEN3 EOD for Halo Infinite, later reused for RAMPART-class Mjolnir.

    Concept art of GEN3 EOD for Halo Infinite, later reused for RAMPART-class Mjolnir.

  • A Vannak-134 weapon charm in Halo Infinite.

    A Vannak-134 weapon charm in Halo Infinite.

  • GEN1 EOD (right) in Halo Infinite.

    GEN1 EOD (right) in Halo Infinite.

  • An EOD-clad Spartan wielding a Mk50 Sidekick on Forbidden.

    An EOD-clad Spartan wielding a Mk50 Sidekick on Forbidden.

Other

  • Vannak-134 wearing an EOD helmet in Halo: The Television Series.

    Vannak-134 wearing an EOD helmet in Halo: The Television Series.

  • Vannak-134 wearing an EOD helmet in Halo: The Television Series.

    Vannak-134 wearing an EOD helmet in Halo: The Television Series.

  • Prop of Vannak's EOD helmet.

    Prop of Vannak's EOD helmet.

List of appearances

Sources

  1. ^ a b c d Halo: The Essential Visual Guide, page 65
  2. ^ a b c d Halo 4: The Essential Visual Guide, page 151
  3. ^ a b Halo 3, Spartan Armor Customization: EOD - Helmet Description "The Mjolnir/EOD variant was created at UNSC facilities on Chi Ceti 4. The helmet was designed specifically to channel the pressure wave around the user's head, significantly reducing the likelihood of decapitation."
  4. ^ a b Halo 4, Spartan Armor Customization: EOD Description "Abilene's NCC took over production of this Mjolnir kit in 2554."
  5. ^ Halo 3, Spartan Armor Customization: EOD - Shoulder Description "Developed at the UNSC Damascus Materials Testing Facility on Chi Ceti 4, the Mjolnir/EOD variant was designed specifically to reduce the number of grabbing edges on the armor, decreasing the likelihood of dismemberment."
  6. ^ Halo 3, Spartan Armor Customization: EOD - Chest Description "This variant was designed specifically to protect Spartans during operations involving the handling of explosive ordnance (e.g., cleaning/planting land mines, demolishing enemy structures/materiel)."
  7. ^ Halo Waypoint, MJOLNIR 2 (Retrieved on Mar 14, 2011) [local archive] [external archive]
  8. ^ a b Halo 5: Guardians, Spartan Appearance Customization: EOD GEN1 - Helmet Description "The unique combination of safety and life support features in the EOD helmet make it an optimal choice for Spartan assault divers and pioneers who undertake demolition roles. That it also mitigates the risk for decapitation is a bonus."
  9. ^ Halo Infinite, Armor Hall: EOD - Helmet Description "Still used in explosive situations where a Spartan needs to keep a good head on their shoulders."
  10. ^ Halo 4 Limited Edition: Infinity briefing packet
  11. ^ Halo Waypoint, Halo 4 Interactive Guide - Armor Types: EOD (Retrieved on Apr 23, 2013) [local archive] [external archive]
  12. ^ YouTube - Paramount+, Halo The Series (2022) Official Trailer (Retrieved on Jan 30, 2022)
  13. ^ YouTube - haloinfectedX, Halo: Reach beta Armor (customizations)

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List of armor permutations by game title

v • d • e
 
List of armor permutations in Halo 3
Bungie Armor • CQB • EOD • EVA • HAYABUSA • Mark V • Mark VI • ODST • Recon • Rogue • Scout • Security • Katana
MCC-exclusive Spartan armor
Air Assault • Aviator • COS • Compass • Deadeye • Demo • Hammerhead • Hivemind • Infiltrator • Lancer • Mirage • Navigator • Nomdagro • ODST (COMM • DEMO • HVY • TAC) • Pioneer • Rhine • Soldier • Suture • Tanker • Warrior
MCC-exclusive Elite armor
Fractures Spartan armor
v • d • e
 
List of armor permutations in Halo: Reach
Spartan armor
Air Assault • Commando • CQB • CQC • EOD • EVA • Grenadier • GUNGNIR • HAZOP • JFO • Mark V • Mark V[B] • Mark VI • Military Police • ODST • Operator • Pilot • Recon • Scout • Security • AKIS (MCC only) • Mariner (MCC only)
Spartan supplemental armor
Assault • Collar • FJ/PARA • Hard-point (HP) • Jump Jet restraints • Sniper • Tactical • Up-armored (UA) • GRD (MCC only) • EXO/TSCS (MCC only)
Elite armor sets
Fractures Spartan armor
Cut armor
v • d • e
 
List of armor permutations in Halo 4
Armor

Regular: Air Assault • Aviator • CIO • Commando • Deadeye • Defender • EOD • Enforcer • EVA • FOTUS • GUNGNIR • HAZOP • Infiltrator • Locus • Mark VI • Oceanic • Orbital • Protector • Raider • Ranger • Recon • Recruit • Scanner • Scout • Soldier • Strider • Vanguard • Venator • Warrior • War Master

Specialization: Engineer • Operator • Pathfinder • Pioneer • Rogue • Stalker • Tracker • Wetwork
Forearms/Legs
MCC-exclusive
Cut armor
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List of armor permutations in Halo 5: Guardians
Achilles • Air Assault • Anubis • Argonaut • Argus • Athlon • Atlas • Aviator • Breaker • Buccaneer • CQB • Centurion • Challenger • Cinder • CIO • Commando • Copperhead • Cyclops • Cypher • Deadeye • Decimator • Defender • Dynast • EOD • Enforcer • Engineer • EVA (GEN1 and GEN2) • Fenrir • Foehammer • FOTUS • Freebooter • Goblin • GUNGNIR • Helioskrill • Hellcat • Helljumper • Hermes • Hunter • Icarus • Indomitable • Infiltrator • Interceptor • Intruder • Jumpmaster • Legionnaire • Locus • Mako • Marauder • Mark IV • Mark V (Alpha and Delta) • Mark VI (GEN1 and GEN2) • Maverick • Military Police • Nightfall • NOBLE • Nomad • Olive • Operator (GEN1 and GEN2) • Orbital • Pathfinder • Pioneer • Pilot • Protector • Raider • Raijin • Ranger • Reaper • Recluse • Recon (GEN1 and GEN2) • Recruit • Rogue • Scanner • Scout • Security (GEN1 and GEN2) • Seeker • Shinobi • Soldier • Stalker • Stinger • Strider • Teishin • Technician • Timmy • Tracer • Tracker • Valkyrie • Vector • Venator • Venture • Vigilant • Viper • Void Dancer • Warrior • War Master • Wetwork • Wrath
v • d • e
 
List of armor permutations in Halo Infinite
Spartan armor

Mark VII (Achilles • Agitator • Anubis • Armet • Aviator • Barrister • Brawler • Camazotz • Cavallino • Celox • Cestus • Champion • Courier • Deadeye • Dokkaebi • Eclipse • Emissary • Enigma • Firefall • Flanker • Hawker • Helioskrill • ISR • Kai-125 • Linebreaker • Magister • Mark V Zeta • Mark VI • Mark VI MOD • Mark VII • Menachite • Mercury • Rampart • Renegade • Riz-028 • Rockeye • Security GEN3 • Soldier • Sovereign • Spartanstein • Stormfall • Talon • Thremaleon • Trailblazer • Trendlock • Torchbearer • Tormenter • Vannak-134 • Volant • War Master • Winterknight • XM55 ACH • Zvezda)
Mark V [B] (Air Assault • Commando • CQB • CQC • EOD • EVA • Grenadier • GUNGNIR • HAZOP • JFO • Mark V • Mark V [B] • Mark VI • Military Police • ODST • Operator • Pilot • Recon • Scout • Security)
Rakshasa (AKIS II-GRD • Artaius • Assailer • Bunyip • Cambion • Conqueror • Cutthroat • Lechuza • Locus • Morrigan • Negotiator • Rakshasa • Rasetsu • Scorn • Shikari • Stribog • Taskmaster • Ullr • Viper)
Mirage IIC (Athlon • Balor • Belus • Erinyes • Extender • Mirage IIC • Neith • Nexus • Skymarcher • Squire • Street Viper • Tyro • Veles)
Hazmat (Ashmaw • Burrowlens • Farkas • Mark VI CBRN • Notus • Oberon • OSTEO • Ogun • Project CORSAC • Serket • Skarbnik • Steelheart • Temfor • Voidspear)

Mark IV (Ardent • Emil • Isidor • Mark IV • Paladin • Theodor • Ulrich • Valiant • Wilhelm • Ypsilon • Zacharias • Ärger • Ökonom)
Spartan armor accessories
AAP • FC • FCI • SAP • TAC (Assault) • UA (Collar • Type FJ) • UTIL (HP)
Other
Fractures Spartan armor

Yoroi (Azechi • Chonmage • Hakushika • Hikeshi • Ikari • Jingasa • Kabuto • Kawari • Kendo • Otomosho • Yokai)
Eaglestrike (Boggart • Brodie • Eaglestrike • Kerberos • Leadbelcher • M199X • Sky Marshal)

Chimera (Abatur • Chimera • Deltajock • Flenser • Fomorian • Geist • Grendel • Grimghast • Merrow • Mimir • Peaceweaver • Strigoi • Thresher • Wendigo)
For a complete list, check out our armor category.

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List of armor permutations by generation

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MJOLNIR Powered Assault Armor
Mainline armor generations
Mark I • Mark II • Mark III • GEN1 (Mark IV • Mark V • Black • Mark VI • Mark VII) • GEN2 • GEN3
Armor components
Competing and related projects
ARTAIUS • Buccaneer • COBALT • HAYABUSA • HRUNTING • MELAENO • Mirage • OSTEO • Rakshasa • Shinobi • SPI • YGGDRASIL
Armor permutations (by generation)
Supplemental equipment
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GEN1
Marks
Variants
Air Assault • AKIS • Ardent • Argus • B • Centurion • COBALT • Commando • CQB • CQC • Emil • EOD • EVA • Grenadier • GUNGNIR • HAYABUSA • HAZOP • Hoplite • Isidor • JFO • Mariner • Military Police • Mirage • MJOLNIR/Black • Paladin • ODST • Operator • Orbital • Pilot • Raider • Ranger • Recon • Rogue • Scout • Security • Strider • Theodor • Tracker • Ulrich • Valiant • Venator • Wilhelm • Ypsilon • Zacharias • Ärger • Ökonom
v • d • e
 
GEN2
Mark variants
Mark IV (GEN2) • Mark V (GEN2 • Alpha • Delta) • Mark VI (GEN1 • GEN2 • MOD) • Mark VII (GEN2)
Variants originating from GEN1
Air Assault • Argus • Commando • Centurion • EOD • EVA • GUNGNIR • HAZOP • ODST • Operator • Orbital • Raider • Ranger • Recon • Rogue • Scout • Security • Strider • Venator
Variants based on GEN1
New variants
Achilles • Anubis • Argonaut • Athlon • Atlas • Aviator • Barvo • Breaker • Challenger • Cinder • CIO • Copperhead • Cyclops • Cypher • Deadeye • Decimator • Defender • Dynast • Enforcer • Engineer • Fenrir • Foehammer • FOTUS • Freebooter • Goblin • Helioskrill • Hellcat • Helljumper • Hermes • Hunter • Icarus • Infiltrator • Interceptor • Jumpmaster • KEYSTONE • Legionnaire • Locus • Mako • Marauder • Maverick • Mirmillion • Nightfall • Nomad • Oceanic • Oppressor • Pathfinder • Pioneer • Prefect • Protector • Raijin • Reaper • Recluse • Recruit • Ricochet • Scanner • Seeker • Soldier • Stalker • Stinger • Teishin • Technician • Tracer • Tracker • Valkyrie • Vanguard • Vector • Venture • Viper • Void Dancer • Warrior • War Master • Wetwork
Forearms/Legs
Other
For a complete list, check out our MJOLNIR armor category.
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