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{{Status|Canon}}
{{Era|H1|H2|H3|HW|FOR|TF|FS|GOO|CH|UP|HGN|ILB}}
{{Cleanup}}
{{Infobox Military Unit
{{Military infobox
|unit_name=UNSC Marine Corps
|image=[[File:UNSC MC Logo.svg|100px|class=invert-dark]]<br>The [[Symbols of the UNSC|logo of the Marine Corps]]
[[Image:H3 Zune Marine.jpg|250px]]
[[File:Waypoint REQ Relief Image Marines.jpg|350px]]
|dates= Since [[2163]]
|formed=[[2163]]{{Ref/Reuse|waypoint unsc}}{{Ref/Reuse|enc22pg56}}
|country=
|affiliation=[[Unified Earth Government]]
|allegiance= [[United Nations Space Command]]
|branch=
|branch=
|type=
|type=  
|role=Expeditionary warfare
|role=  
|size=
|size=Unknown numerous divisions
|nicknames="Jarheads",<ref>'''[[Halo: Spartan Assault]]''', ''[[Halo: Spartan Assault/Quotes|Quotes]]''</ref> "Leathernecks"<ref>'''[[Halo: Combat Evolved]]''', campaign level, ''[[The Truth and Reconciliation]]''</ref>
|command_structure=
|battles=*[[Interplanetary War]]
|garrison=
*[[Insurrection]]
|garrison_label=
*[[Human-Covenant War]]
|nickname= "Leathernecks", "Devil Dogs", "Jarheads"
*[[Post-Covenant War conflicts]]
|patron=
|commanders=*[[General]] [[Hogan]]<ref name="HE1">'''[[Halo: Escalation]]''', ''[[Halo: Escalation Issue 1|Issue #1]]''</ref>
|motto=
*General [[Daniel Black]]
|colors=
*General [[Van Zandt]]
|colors_label=
*General [[Kits]]
|march=
*[[Colonel]] [[Kennedy Mehaffey]]
|mascot=
*Colonel [[Felicia Sanderson]]
|anniversaries=
*Colonel [[Robert Watts]] {{C|Formerly}}
|equipment=
*[[Sergeant Major]] [[Avery Johnson]]
|equipment_label=
|battles=  
*[[Battle of Harvest]]
*[[Battle of Sigma Octanus IV]]
*[[Battle of Reach]]
*[[Battle of Installation 04]]
*[[Operation: FIRST STRIKE]]
*[[First Battle of Earth]]
*[[Battle of Installation 05]]
*[[Second Battle of Earth]]
*[[Human-Covenant War|And many others]]
|decorations=
|battle_honours=
|commanders=*[[General]] [[Kits]]
*[[Major General]] [[Nicolas Strauss]]
|notable_commanders=
}}
}}
{{Quote|First to Fight.|UNSC Marine Corps Credo<ref>[https://web.archive.org/web/20060508200613/http://www.joyridestudios.com/halo_3_marine_1.asp '''Joyride Marine description''']</ref>}}
{{Article Quote|They're the best of the best, but they're only [[human]].}}
The '''UNSC Marine Corps''' is a branch of the [[United Nations Space Command|United Nations Space Command Defense Force]], mainly a division of the [[UNSC Navy]], primarily responsible for land-based military operations, and protecting Navy starships and bases from attack.


The '''UNSC Marine Corps''' is a branch of the [[United Nations Space Command]] responsible for conducting land-based expeditionary amphibious and airborne combat operations, using the mobility provided by the [[UNSC Navy]] to rapidly deliver forces. '''Marines''' are also charged with the defense of Navy vessels and installations from hostile forces. While structured under the [[Unified Ground Command]],{{Ref/Book|Id=enc54|Enc11|Page=54}} the UNSC Marine Corps operates closely with the [[UNSC Naval Command]] and has some authority within the office.{{Ref/Book|Id=fb|Halo: Fleet Battles core rulebook|Page=6}} The Marine Corps is one of the five uniformed services branches of the UNSC Armed Forces.{{Ref/Site|Id=waypoint unsc|URL=https://www.halowaypoint.com/en-us/universe/factions/unsc|Site=Halo Waypoint|Section=Universe, Factions|Page=UNSC|D=19|M=1|Y=2021|LocalArchive=https://archives.halopedia.org/waypoint/www.halowaypoint.com/en-us/universe/factions/unsc.html}}
__TOC__
==Background==
A rugged and diverse assortment of warriors, the marines of the [[United Nations Space Command Defense Force]] are fighting a [[Human-Covenant War|losing war]] against the [[Covenant]]'s superior technology and numbers. Under the leadership of notable commanders, they continue to wage a furious struggle against the [[Covenant]], even as their numbers dwindle.


==History==
== Operational History ==
===Origins and formation===
[[File:HM-Interplanetary War-2.jpg|200px|thumb|left|A firefight inside a Jovian installation during the Interplanetary Wars.]]
The [[United States of America|United States]] [[Wikipedia:United States Marine Corps|Marine Corps]] is the precursor to the UNSC Marine Corps.{{Ref/Book|Id=enc31|Enc11|Page=31}} As the [[Interplanetary War]] began in the [[2160]]s, the [[national government]]s of the [[Sol system]] strengthened and deployed their militaries for conflict. However, the distributed nature of their forces led to disorder among the ranks of these militaries.{{Ref/Book|Id=enc42|Enc11|Section=Chapter Two: Humans - Human Colonization of Space|Page=42}} In response, the [[United Nations]] in [[2163]] commissioned a force primarily composed of naval and marine assets; the [[United Nations Space Command]], its [[UNSC Navy|Navy]], and its Marine Corps.{{Ref/Reuse|waypoint unsc}} The Marine Corps would be formed from the combination of the naval and spaceborne expeditionary units from various [[National government|nations]] into a single force.{{Ref/Book|Id=enc22pg56|Enc22|Page=56-57}}


Triggered by [[Koslovic]] attacks at the [[Argyre Planitia]] shipbuilding plants on [[Mars]], the United Nations began the [[Mars Campaign]] in [[2163|December 2163]]. This campaign marked the first extraterrestrial deployment of the UNSC Marine Corps, as the UNSC launched a series of lightning strikes against Koslovic forces near the Argyre Planitia.{{Ref/Reuse|enc42}}
=== Before The Human-Covenant War ===
The [[UN Marine Corps]] (the predecessors of the UNSC Marine Corps) was one of the main combat groups in the [[Interplanetary War]]. In 2163, Marines were first deployed outside of [[Earth]] on [[Mars]]. After the [[UN]] won the war in [[2164]], they became the [[UNSC]], with the Marines becoming the UNSC Marine Corps.


The decisive success of this campaign had a major impact on future military doctrine, resulting in UNSC Navy [[warship]]s carrying large Marine contingents for ground assaults and [[Naval boarding|boarding]] actions. Following the success of the UNSC Marine Corps at Mars, recruitment drives and [[propaganda]] tactics strongly bolstered UNSC forces and the Koslovics and [[Frieden]]s were defeated on [[Earth]] in [[2170]].{{Ref/Site|Id=XC|URL=http://www.xbox.com/en-US/games/h/halo/storyline.htm|Site=Xbox.com|Section=Halo: Combat Evolved, Game Features|Page=Story Line|D=7|M=11|Y=2008|LocalArchive=Archive:Xbox.com/Halo/Timeline}}{{clear}}
===First Encounters===
[[Image:Halo_Wars_Marine_BR.jpg|right|thumb|UNSC Marines fight [[Elite]]s with [[BR55HB SR Battle Rifle]]s in one of the Marine Corps's first battles with the Covenant.]]
The first documented Marine Corps encounter with the covenant was the [[Battle of Harvest]], where the UNSC Marine Corps deployed to battle Covenant ground forces on the colony world before it was [[glassing|glassed]] by the [[Covenant Fleet]]. One of the soldiers deployed was [[Avery J. Johnson]]<ref>''[[Halo: Contact Harvest]]'' front cover</ref>.


===The Insurrection===
Another one of their first encounters<ref>''[[Halo Wars]]''</ref> occurred on an arctic world, possibly in the [[Epsilon Indi System|Harvest System]], where the Marine Corps quickly established a home base while an outfit of Marines reconnoitered the nearby area, but were slaughtered by camouflaged [[Energy Sword]]-wielding [[Special Operations Elite]]s. In response, a detachment of Scorpions and Warthogs were sent to investigate, but were too late, and were met, head on, only by a heavy Covenant battle force, with large numbers of [[Banshee]] attack fighters and [[Sangheili|Elite]] warriors, and the UNSC suffered heavy air casualties. Later, the Marine presence was reinforced by [[Spartan Group Omega]], but the outcome of this battle was unknown<ref>[[Halo Wars Announcement Trailer]]</ref>.
[[File:H4FUD Marine.png|thumb|180px|A marine in [[Corbulo Academy of Military Science|Corbulo Military Academy]] during the period of the Insurrection circa [[2526]].]]
{{main|Insurrection}}
From [[2494]] to [[2525]], the UNSC Marine Corps would be responsible for dealing with [[Insurrectionist]] uprisings on UNSC colonies and star systems. From [[2512]], the Marines were involved in one of the largest operations in their history, [[Operation: TREBUCHET]], aimed at quelling rebel uprisings in the [[Eridanus system|Eridanus]] and [[Epsilon Eridani system|Epsilon Eridani]] star systems.


Units from the [[9th Marine Expeditionary Force]] were sent to [[Eridanus II]] in force, hoping to capture leaders of the rebel movement and pacify the population. One of these units, the first Battalion of the [[21st Marine Division]] commanded by [[Lieutenant Colonel]] [[Ponder]], was involved in a disastrous mission to try and capture the second in command of rebel forces in [[Elysium City]], which ended in the leader's family being killed and Ponder wounded and demoted.<ref>'''Halo: Contact Harvest''', ''page 112''</ref>
===[[Battle of Sigma Octanus IV]]===


In [[2524]], a Marine battalion was posted at the colony world of [[Tribute]], commanded by Lieutenant Colonel [[Aboim]] and supported by the corvette {{UNSCShip|Bum Rush}}, with air support from [[AV-14 Hornet]]s. The battalion attempted to put a stop to rebel bomb makers near the city of [[Casbah]]. Two special warfare squads, led by [[Staff Sergeant]]s [[Avery Johnson]] and [[Nolan Byrne]], were involved in disastrous operation in June. Byrne's team was killed during a hostage situation at a [[Jim Dandy]] restaurant near Casbah city; thirty-eight civilians, three Marines, and two rebels were killed in the bombing.<ref>'''Halo: Contact Harvest'''</ref>
There was a Marine presence on [[Sigma Octanus IV]]. In the first stage of the battle, during a naval engagement, a [[Covenant Carrier]] was able to land a large contingent of troops on the northern pole of the planet.  


===Human-Covenant War===
The Covenant were able to take [[Côte d'Azur]], a major population center. Fortunately, almost all of the civilian population was able to be evacuated beforehand, and UNSC Marine Corps [[General]] [[Kits]] launched an assault by 0700 hours to retake the city. It was unsuccessful.
======Outer Colony campaigns======
[[File:HW Render Infantry 1920-crop.jpg|thumb|300px|left|UNSC Marines during the [[Harvest campaign]].]]
The UNSC Marine Corps' first encounter with the alien [[Covenant]] was at the [[First Battle of Harvest]] in [[2525]]. At the event, only three Marine officers were present, training the planet's [[Colonial Militia]]. During the battle, [[Captain (Marine Corps)|Captain]] [[Ponder]] became the Corps' first casualty of the war.


Not long after the First Battle of Harvest, the Corps' experienced one of their first major encounters with the Covenant at numerous engagements throughout the Outer Colonies, including the [[Harvest Campaign]], eventually lasting from [[2526]] to [[2531]]. At the final stages of the campaign, the Marines quickly established a [[Alpha Base (Harvest)|base of operations]] in Harvest's arctic region. A reconnaissance force led by [[Sergeant]] [[John Forge]] was deployed to survey the area. However, during the patrol, Covenant forces under the command of [[Arbiter]] [[Ripa 'Moramee]] overran and nearly destroyed the base. Forge rallied scattered marines, who quickly retook it from the aliens. After receiving reinforcements and repairing the base, the Marines fought through a sizable Covenant garrison force in an attempt to secure a mysterious [[Forerunner]] [[Relic (location)|relic|structure]] in the region.
Meanwhile, three Marine squads, nearby Côte d'Azur and under the command of [[Lieutenant]] [[McCasky]], were dispatched for a light reconnaissance of [[Sigma Octanus IV Grid 13 x 24|Grid 13 x 24]]. They were engaged by [[Covenant]] forces, including [[Mgalekgolo|Hunter]]s, and a sole UNSC [[Warthog|M12 Warthog LRV]] of the reconnaissance force survived with four Marines by the names of [[Harland]], [[Walker]], [[Fincher]], and [[Cochran]]. Shortly afterwards, [[Firebase Bravo]] was destroyed by the Covenant, and the Warthog was forced to divert to [[Alpha Headquarters]].


In the final weeks of 2525, the UNSC Marine Corps deployed en masse to the colony of [[Alpha Corvi II]] to [[Battle of Alpha Corvi II|defend]] its capital city from the Covenant who had invaded the planet in search of a Forerunner artifact. Their deployment also served to divert the bulk of the Covenant's infantry away from [[Blue Team]], who were charged with destroying the expeditionary force seeking to recover the artifact and then to claim it for the UNSC. Although Blue Team succeeded in their objectives with the reluctant assistance of the [[United Rebel Front]], the UNSC Marines were not able to repel the enemy and were ordered to abandon their offensive with casualties exceeding thirty percent. The UNSC fleet rescued as many surviving soldiers as possible before the few vessels that remained were ordered out of the system.  
It, too, had been attacked, though the Covenant attack had been repulsed, though not without suffering heavy casualties. Harland promptly requested reinforcements from the cruiser in orbit, the {{UNSCShip|Leviathan}}.  The ''Leviathan'' sent a team of twelve [[SPARTAN-II]]s commanded by [[SPARTAN-117]] to reinforce<ref>''[[Halo: The Fall of Reach]]'', page 174</ref>.


The [[Battle of Arcadia]] saw the UNSC Marine Corps holding the defensive line around major population centers to allow evacuation for the civilian population with the assistance of the SPARTAN-II [[Red Team]]. Successfully keeping Covenant forces from occupying the population centers, the Corps' began launching multiple assaults on the Covenant's base of operations to reclaim the planet.
The surviving Marines of Marine HQ protected a [[Pelican Dropship]] while the SPARTANs detonated a [[HAVOK Nuclear Warhead]] in Côte d'Azur, cleaning the Covenant ground presence from Sigma Octanus IV, and then retreated back to a Pelican dropship, which promptly took off with other Pelicans holding other Marine survivors for the UNSC ''Leviathan''<ref>''[[Halo: The Fall of Reach]]'', page 212</ref>.


The UNSC Marine Corps would take part in numerous actions against the Covenant on many of the Outer Colonies in the years that followed. Unfortunately, they were hopelessly outgunned, out-numbered and out-flanked by the Covenant forces and the Marine Corps would suffer tremendous losses in what eventually saw the near-destruction of the Outer Colonies.
===[[Battle of Reach]]===


======Siege of the Inner Colonies======
The UNSC Marine Corps maintained a sizable presence of Reach when the Covenant stormed the planet, bypassing the defense fleet in orbit and landing large numbers of soldiers on the north and south poles.  
[[File:HaloAnniversaryMarine.jpg|thumb|251px|A UNSC Marine on the {{UNSCShip|Pillar of Autumn}} circa [[2552]].]]
The Corps' experienced another encounter with the Covenant on the colony world of [[Sigma Octanus IV]] in [[2552]]. Upon landing, the Marines' hardware and equipments were rendered useless due to the planet's harsh environment. In the first stage of the battle, during a naval engagement, a Covenant {{Pattern|Ruma|light carrier}} was able to land a large contingent of troops on the northern pole of the planet. The Covenant were able to take [[Côte d'Azur]], a major population center. Fortunately almost all of the civilian population was evacuated beforehand, but the UNSC Marine Corps' [[General (UNSC)|General]] [[Kits]] launched a failed assault to retake the city.


The UNSC Marine Corps maintained a sizable presence on [[Reach]] when the Covenant [[Fall of Reach|stormed the planet]]; they bypassed the defense fleet in orbit, as well as the [[MAC Gun]] platforms, and made a considerable landing of soldiers on the North and South Poles. During the early hours of the battle, the Covenant had overrun [[FLEETCOM HQ]] on Reach, destroying the perimeter and swarming the Marine defenders with [[Type-26 Ground Support Aircraft|Banshees]], [[Zurdo-pattern Wraith|Wraiths]], and battalions of infantry. The situation became severe and critical when the Marines were forced to defend the [[Orbital Defense Generator]]s against a massive Covenant assault, using every available armored vehicle and defensive position from available bunkers. The Battle of Reach became one of the most devastating defeats for the UNSC Marine Corps in the Human-Covenant War.
By 0555 hours, the Covenant had overran [[FLEETCOM HQ]] on Reach, destroying the perimeter and swarming the Marine defenders with [[Banshee]]s, [[Wraith]]s, and battalions of infantry. The objective of the Covenant ground armies was to destroy a series of fusion reactors on Reach's surface that powered the orbiting [[Super Magnetic Accelerator Cannon]]-equipped [[Orbital Defense Platform]]s, and thus, disabling the UNSC's sole major defensive asset and allowing the Covenant fleet to occupy Reach's airspace.


The surviving Marines from the Battle of Reach served an important role in the [[Battle of Installation 04]], taking part in such engagements as securing the {{UNSCShip|Pillar of Autumn}} crash site, launching multiple guerrilla assaults on Covenant convoys and base of operations and rescuing captured Pillar of Autumn's personnel from a [[Truth and Reconciliation|Covenant battlecruiser]]. Initially, the Marines were part of a special operation consisting of a sizable [[Orbital Drop Shock Trooper]] special forces detachment and a standard Marine detachment to infiltrate [[High Council Chamber|Covenant High Command]] and kidnap a Covenant [[Hierarch|Prophet]].
By 0622 hours, the situation was critical enough that the {{UNSCShip|Pillar of Autumn}} sent a full detachment of [[SPARTAN-II]] supersoldiers to Reach in a Pelican dropship to defend the fusion generators. The Orbital Defense Platforms were already being vaporized in space, and if they were compromised from the ground, the meager remaining UNSC defense fleet would swiftly fall.  


======Earth and the end of the war======
Meanwhile, [[Charlie Company]], a Marine detachment, was in charge of defending [[Orbital Defense Generator Facility A-331]]. They were forced to defend against a massive Covenant attack, using chainguns and missiles to fight off superior forces. [[Lieutenant]] [[Buckman]], the CO of Charlie Company, flanked the Covenant, but FLEETCOM, alarmed that the Covenant might overrun ODG A-331, overreacted and carpet-bombed the area, eliminating the Covenant as well as most of Charlie Company.
{{References|section}}
[[File:H2AMarines.png|thumb|left|300px|Two Marines standing beside [[John-117|Spartan-117]] during the [[Battle of Mombasa]].]]
{{Quote|Dear humanity, we regret being alien bastards. We regret coming to Earth. And we most definitely regret that the Corps just blew up our raggedy-ass fleet!|[[Sergeant]] [[Avery Johnson|Johnson]]}}
The UNSC Marine Corps remained in force on [[Earth]] and its geosynchronous [[orbital defense platform]]s, and were mostly prepared to repulse a relatively small Covenant invasion, when fifteen Covenant capital warships, two [[CAS-class assault carrier|assault carriers]] and thirteen [[Ket-pattern battlecruiser|battlecruisers]], entered the Sol System. They then played a significant role in during the [[Battle of Earth]], where they defended multiple major population centers from the Covenant's occupation such as those in [[Battle of Mombasa|New Mombasa]], [[Battle of Cleveland|Cleveland]], and [[Battle of Havana|Havana]].  


Several Marine detachments achieved a turning point during the course of the Battle of Earth when they managed to retake the cities and maintain temporary ground control for UNSC reinforcements to arrive. One such Marine detachment was [[E2-BAG/1/7]], which was able to engage the Covenant ground forces in [[Mombasa]], [[Kenya]] as the Covenant assault carrier landed ground forces in the city.
There were four survivors of Charlie Company that held their position until they met with the SPARTANs. The survivors were sent with several heavily wounded SPARTANs to a fallback position at [[Mechanite Mountain]], but all four Marines died from the Covenant, ending the UNSC Marine Corps's known involvement in the Battle of Reach.


The Marine Corps also partook in a major assault alongside the UNSC Navy in the [[Battle of Voi]]. As ground forces, the Marines were to engage in the [[Battle of Voi]] with a [[John-117|SPARTAN-II supersoldier]] by eliminating anti-air vehicles and batteries, as well as destroying temporary Covenant outposts to allow UNSC reinforcements to refortify the area.
===[[Battle of Installation 04]]===


The Marines fought in the war's [[Battle of Installation 00|last battle]] at [[Installation 00|the Ark]]. Starting with their deployment in an [[operation]] codenamed Operation: BLIND FAITH,<ref>'''[[Halo Encyclopedia (2009 edition)]]''', ''page 57''</ref> the Marines launched numerous attacks on Brute strongholds, including an attack on the Ark's [[cartographer]]. After fighting on foot, and in heavy vehicles, the Marines drove off the Covenant. They then teamed up with the Elites and attacked three [[barrier tower]]s protecting the Ark's [[Installation 00 Citadel|Citadel]]. After capturing the first tower, with the help of the Master Chief, Marines and UNSC [[pilot]]s then defeated the Covenant aerial forces. They then waited for the deactivation of the third tower, where they then staged an attack on the Citadel. After fighting two Scarabs, they were then evacuated back to the fleet while the Master Chief and the Arbiter killed Truth. The surviving Marine forces fell back to Earth through the Portal on board the ''[[Shadow of Intent]]'' before [[Installation 08]] was activated.
==== Landfall ====


===Further engagements===
A sizable [[Orbital Drop Shock Trooper]] special forces detachment and a standard Marine detachment was assigned to the {{UNSCShip|Pillar of Autumn}} for its intended operation to infiltrate [[Covenant]] High Command and kidnap a [[Prophet]] as leverage for negotiating a peace treaty between the UNSC and the Covenant. However, the ambush over [[Threshold]] forced the ''Pillar of Autumn'' to crash land on the [[Forerunner]] installation also known as [[Installation 04]] (Alpha Halo).
{{Main|Post-Covenant War conflicts}}
[[Image:Siege.jpg|right|thumb|Marines aboard the {{UNSCShip|Pillar of Autumn}} take cover from Covenant boarders behind [[Combat Barrier]]s.]]
[[File:H4 SpOps LandGrab ThirdPerson 02.jpg|thumb|250px|A Marine wearing a post-war BDU  circa [[2557]].]]
The ''Pillar of Autumn'''s ODST detachment consisted of four 130-man companies: Companies A, B, C, and D, for a total of approximately 520 operators. During the Covenant boarding of the ''Pillar of Autumn'', they were assigned to defend the engine room of the warship against the boarding parties. They were extremely efficient in their defense, suffering only several dozen casualties while successfully holding off the Covenant at the two entrances to the massive engine chamber<ref>''[[Halo: The Flood]]'', page 33</ref>. However, the standard Marines did not fare as well in their defense, setting up multiple lines of defense around the periphery of the ''Pillar of Autumn'' and utilizing [[Combat Barrier]]s and urban combat techniques in the restrictive environment to hold off the enemy, which were [[Elite]]s and [[Grunt]]s. Ultimately, they were unsuccessful, and the Covenant managed to infiltrate many compartments of the warship before [[Captain]] [[Jacob Keyes]], commander of the ''Pillar of Autumn'', decided it was a lost cause to hold off superior numbers of attacking Covenant warships as well as internal boarders and ordered all hands to evacuate.<ref>''[[Halo: Combat Evolved]]'', ''[[Pillar of Autumn (Level)]]''</ref>.
After the end of the war against the Covenant, the UNSC Marines participated in a number of engagements against the [[Covenant remnants]] and the [[Insurrectionist]]s. Significant numbers of Marines stationed on [[Draetheus V]] helped fend off the [[Merg Vol's Covenant|Covenant]] assault during the [[Battle of Draetheus V]].<ref>'''Halo: Spartan Assault'''</ref> A force of Marines were also assigned to the UNSC Navy's new flagship, {{UNSCShip|Infinity}}. When the ship subsequently crash-landed on [[Requiem]] in [[2557]], the Marines joined the [[Spartan Operations|Spartans]] in fighting off the opposing [[Jul 'Mdama's Covenant|Covenant]] forces and [[Forerunner]] [[Promethean]]s in the [[First Battle of Requiem]]. When ''Infinity'' returned to Requiem in order to conquer the planet, Marines were once again dispatched in a joint campaign to reinforce the Spartans. The [[Requiem Campaign]], waged in [[2558]], saw both sides trying to seize the [[Janus Key]] before the [[shield world]]'s destruction.<ref>'''Halo 4''', ''[[Spartan Ops]]''</ref>


By [[2558]], some [[War Games]] simulations feature [[AI]] Marines that assist the [[Spartan-IV]]s in their training.<ref>[https://www.halowaypoint.com/en-us/news/canon-fodder-in-the-zone '''Halo Waypoint''': ''Canon Fodder - In the Zone'']</ref>
Naval crewmen and standard Marines evacuated in [[Bumblebee]] lifepods while the ODST companies utilized [[Human Entry Vehicle]]s. The landings, however, had numerous problems and killed dozens of UNSC soldiers and crewmen alike. [[Major]] [[Antonio Silva]], the ODST Commander, ordered all surviving ODST units to secure a lightly-defended Covenant-held butte, which he turned into a coordinating home base for the UNSC resistance to come against the Covenant.  After securing it, the ODSTs worked to make it a strategically defendable point for the UNSC survivors. It was christened [[Alpha Base]], and Major Silva ordered all remaining UNSC forces to rendezvous there to make a stand. The Covenant launched a large vehicular raid on Alpha Base of nearly a hundred [[Ghost]]s, but the 200 or so remaining ODSTs were able to repulse the poorly led assault.


==Organization==
The Covenant placed as high a priority on recovering UNSC lifepods as the UNSC forces did. Many of the successful landings were soon sieged by Covenant attacks in an effort to minimize the number of UNSC personnel on the ringworld. Individuals and teams such as [[SPARTAN-117]]'s group spent a considerable amount of time securing lifepods throughout the installation. However, the human forces had realized that [[Captain]] [[Jacob Keyes]] had been captured by the Covenant.
===Command and control===
The Marine Corps is subordinate to the [[UNSC High Command]] and the branch has a seat on the [[UNSC Security Council]], currently represented by [[General]] [[Hogan]].{{Ref/Reuse|HE1}} The administrative head of the Marine Corps is the Commandant of the Marine Corps.{{Ref/Reuse|enc22pg56}} The Marine Corps is largely under the authority of the UNSC's [[Unified Ground Command]] (UniCom), responsible for managing ground-based operations of the Marine Corps, the [[UNSC Air Force]], and the [[UNSC Army]].{{Ref/Reuse|enc54}} However, due to the Marines' expeditionary nature, the branch has some with the [[UNSC Naval Command]], particularly in the Navy-dominated [[UNSC Fleet Command]] where the Marines have only a token representation.{{Ref/Reuse|fb}}


===Operating forces===
==== Truth and Reconciliation ====
The branch also maintains its own [[UNSC Marine Corps of Engineers]] command.<ref>'''Halo: Evolutions''', "[[Midnight in the Heart of Midlothian]]", ''page 82''</ref> As well as possessing infantry, armored, and air units, the UNSC Marine Corps is based around [[Marine Expeditionary Force]]s, which contain at least one [[division]]-sized unit of Marines.<ref>'''[[Halo: Contact Harvest]]''', ''page 111''</ref> Because of its role as an "amphibious", space-deployed force, the Marine Corps enjoys a close relationship with the [[UNSC Navy]], with Marine complements being deployed on most warships.<ref>'''[[Halo: Combat Evolved]]'''</ref><ref name="Halo 2">'''[[Halo 2]]'''</ref><ref>'''[[Halo: The Fall of Reach]]'''</ref> The Marine Corps, along with the Navy, was headquartered at the [[Fleet Command Headquarters]] on [[Reach]], until the facility's destruction and the planet's [[Fall of Reach|fall]] in [[2552]].<ref>'''Halo: Contact Harvest''', ''page 47''</ref>
[[Image:Fitzgerald Shooting.jpg|right|thumb|UNSC Marines in a Warthog defend themselves against a [[Banshee]] after crash-landing.]]
[[Image:Halo-09.jpg|thumb|right|[[Fire Team Charlie]] secures the [[Gravity Lift]] of the ''[[Truth and Reconciliation]]'' while awaiting [[Echo 419]] to bring in further reinforcements.]]
SPARTAN-117 led [[Fire Team Charlie]] to rescue Keyes from the grounded Covenant {{Class|CCS|Battlecruiser|}} ''[[Truth and Reconciliation]]''. They would set down a short distance from the Covenant battlecruiser, and then infiltrate through its [[Gravity Lift]].  From there, they would find Keyes, rescue him, and then evacuate.


In addition to conventional forces, the Marine Corps maintain special forces in the form of the [[Orbital Drop Shock Trooper]]s under the [[Naval Special Warfare Command]]. ODSTs drop into hostile areas via [[drop pod]]s prior to the main invasion. They attempt to complete some of the most difficult tasks in hostile areas, such as clearing enemy ground forces or establishing landing zones for incoming [[Dropship 77-Troop Carrier|Pelicans]].{{Ref/Reuse|Halo 2}}<ref>[http://halo.bungie.net/projects/odst/guide.aspx '''Bungie.net''', ''ODST Field Guide'']</ref>
Surprisingly, the plan went quite well.  Despite a pair of [[Hunters]] being deployed at the Gravity Lift, the approach was simple.  From there, they were able to go up the Gravity Lift into the belly of the ''Truth and Reconciliation''.  The UNSC forces fiercely battled their way through alien corridors for fifteen minutes before reaching a spacious hangar bay. However, before they could continue, the Covenant were able to lock the doors on the Marines and the Master Chief, continually sending in waves of reinforcements to kill the trapped UNSC soldiers in the locked hangar bay. After losing a significant amount of soldiers, [[Cortana]] was able to use her computer countermeasures to force open a door that lead from the hangar to the bridge of the warship. SPARTAN-117 ordered his Marine comrades to wait in the bridge while he assaulted a Covenant brig, freeing Keyes and also three other captured Marines. However, by the time they returned to the bridge, [[Energy Sword]]-wielding Elites had slain the rest of the rescue team. They headed to the Hanger Bay for evacuation, but Covenant air patrols prevented their rescue.  Instead, the team chose to hijack an enemy [[Spirit]] dropship that was laying dormant in the hangar bay, with Captain Keyes freed and secured<ref>''[[Halo: Combat Evolved]]'', ''[[The Truth and Reconciliation (Level)]]''</ref>.


==Personnel==
Shortly afterwards, the UNSC Marine forces stationed at Alpha Base, under the judgment of Major Silva, decide to embark on a risky raid on the crashed hulk of the ''Pillar of Autumn'' to get much-needed supplies and ammunition, vehicular support, and fuel for the ferrying Pelican Dropships. A small 62-man ODST force under the leadership of Lieutenant [[McKay]] raided the Covenant-patrolled crash site of the ''Pillar of Autumn'', using sniper fire to eliminate most of the defending [[Ghost]] attack vehicles and infantry, and then securing the ship with 10 casualties, securing much-needed supplies for the UNSC forces.<ref>''[[Halo: The Flood]]'', page 136</ref> However, the Covenant learned about this, and before McKay's force can return to Alpha Base and drop off the newly-seized supplies and vehicles that they had secured from the wreck of the ''Pillar of Autumn'', they were intercepted by a superior Covenant force in the rocky terrain. The tide of battle is turned to the UNSC's favor, however, by discipline, organization, and luck. The UNSC's four [[Scorpion Tank]]s used shell bombardment to destroy the attacking Covenant [[Wraith]]s, while the UNSC Warthogs fought off waves of assailing [[Banshee]] attack craft and [[Ghost]]s. The Covenant's aggressive tactics yielded no advantage, and the well-coordinated UNSC rocket units and a particularly bold feint by Second Lieutenant [[Oros]] destroyed the dozens of Covenant Banshees, and Marine sharpshooter [[Lance Corporal]] [[Jones]] took a serendipitous sniper rifle shot, killing a Covenant [[Elite]] officer, disorienting and fragmenting the Covenant resistance as UNSC forces plowed through the Covenant remnants.<ref>''[[Halo: The Flood]]'', page 160</ref>.
{{Main|UNSC rank structure}}
''See [[:Category:UNSC Marine Corps personnel|here]] for a list of Marine personnel.''


Large numbers of men and women are employed by the UNSC Marine Corps. Service people hold ranks, which are divided between officers and enlisted. The rank structure of the UNSC Marine Corps is based around that of the [[Wikipedia:United States Marine Corps|United States Marine Corps]].
==== The Flood ====


===Uniform===
{{Quote|Ahh... augh! Get [[Flood Infection Form|it]] off! Get it-augh!|[[Private]] [[Riley]], first UNSC casualty to the [[Flood]]}}
{{Main|UNSC Marine Corps Dress Uniform|UNSC Marine Corps Battle Dress Uniform}}
[[File:H2A - Chief and Johnson on Cairo.jpg|thumb|250px|Sergeant Johnson wearing a white dress uniform.]]
Marine Corps Dress Uniforms are worn on formal or ceremonial occasions, and are similar to those worn by their 20th and 21st Century predecessors in the [[Wikipedia:United States Marine Corps|United States Marine Corps]]. A variety of dress uniforms exist, including a white-and-blue uniform,<ref>'''[[Halo 2]]''', campaign level, ''[[Cairo Station]]''</ref> an all-blue uniform,<ref>'''[[Halo: Contact Harvest]]'''</ref> and an all-black funerary uniform.<ref>''[[The Life]]''</ref>


In the field, Marines usually wear passively [[camouflage]]d uniforms with usually green [[M52B body armor]]. Lightweight, though durable, the armor is surprisingly resilient. Marines don [[Ushuaia Armory]]'s [[CH252 helmet]]s equipped with a [[heads-up display]] and radio system.<ref name="enc49">'''Halo Encyclopedia: The Definitive Guide to the Halo Universe''', ''page 49'' (2011)</ref> These helmets are mounted with [[Helmet recorder|recorders]],<ref>'''Halo: Combat Evolved''', campaign level, ''[[343 Guilty Spark (level)|343 Guilty Spark]]''</ref> and certain models feature holographic text-displaying [[UNSC tactical eyepiece|eyepieces]] or [[Shooting glasses|ballistic goggles]]. Some Marines have been known to employ the "Rex" [[Visual Intelligence System, Reconnaissance|VISR]] for using in tracking down targets, such as Jiralhanae holdouts on [[Tribute]] and Earth.<ref>'''Halo 5: Guardians''', Rex VISR description</ref> In addition to helmets, Marines on field operations in more humid locales sometimes choose to wear [[Wikipedia:Boonie hat|boonie covers]], or those in colder environments don visored and thicker helmets. Marine [[Non-commissioned officer|NCOs]] are easily recognized by the cover they wear complete with the UNSC insignia, although they oftentimes substitute this soft cover for a more practical protective helmet; post-war NCOs often wear a variant with a fully sealed helmet that is otherwise worn by scouts. Marines sometimes don small helmet communications microphones or black-phased sunglasses on their helmets, and others carry backpacks. Marines sometimes wear black gloves to protect their hands and improve their grip on their weapons. Some Marines sport orange visors which attach to the brim of their helmets. Marines operating in cold environments wear environmentally-tailored armor, with insulated snow camouflage utilities and full body armor as well as insulated and visored helmets with something analogous to a balaclava.<ref>'''[[Halo Wars]]'''</ref> Marines also wear the lightweight and protective [[VZG7 armored boots]], the standard footwear of the Marine Corps since the middle of the 26th century.{{Ref/Reuse|enc49}}
Meanwhile, a [[Covenant]] [[Elite]], [['Qualomee]], surrendered to the UNSC and yielded intelligence about a Covenant arms cache in a faraway swamp. After Captain Keyes meets Major Silva and congratulates him and his [[ODST]]s for establishing Alpha Base for the UNSC, Keyes decides to lead a platoon of Marines under the leadership of [[Staff Sergeant]] [[Avery J. Johnson]] to secure this Covenant arms cache while SPARTAN-117 is ordered to a remote island where a [[Forerunner]] construct named the "[[Silent Cartographer]]" is stationed - a construct that is believed to hold an entire and fully-detailed map of Installation 04. Securing the intelligence would give the UNSC an inestimable edge in their resistance efforts.
[[Image:B30 01.jpg|right|thumb|[[SPARTAN-117]] with a fireteam of Marines on a Pelican inbound to the [[Silent Cartographer]]'s island.]]
[[Image:Marines2.jpg|right|thumb|A pair of [[Sergeant]] [[Stacker]]'s Marines fight to secure a LZ after insertion on the beachheads.]]
[[Image:4wiki.jpg|right|thumb|A Marine assists [[SPARTAN-117]] in a [[Warthog]] to find the Control Room.]]
[[Image:Use Spoofer.jpg|right|thumb|UNSC Marine [[Kappus]] opens a locked door in the Covenant "weapons cache", unwittingly unlocking the [[Flood]].]]
[[Image:343GS-Marine Run.jpg|thumb|right|Captain Keyes's second squad flees from the Flood-infested arms cache after meeting with [[SPARTAN-117]].]]
Two Pelican Dropships inserted two squads of Marines (lead by [[Gunnery Sergeant Waller]] and [[Sergeant]] [[Stacker]]) and [[SPARTAN-117]] to an edge of the island. They were deployed under fire, but managed to secure a beachhead and a landing zone for the UNSC to land further reinforcements (including an [[M12 Warthog LRV]]). SPARTAN-117 and two Marines, PFC [[Hosky]] and an unnamed Marine [[corporal]], took the Warthog, driving it to a cliff that was the entrance to the facility that housed the Silent Cartographer. However, the Covenant knew that the UNSC was attempting to secure the intelligence, and locked the entranceway, forcing the trio to make a detour to a security substation, deactivating the locked door before finally being able to tunnel their way through the Covenant defenses stationed inside the subterranean facility and retrieving the intelligence.


==Equipment==
The surviving Marines still awaiting on the landing zone were scheduled to be reinforced by Pelican [[Bravo 22]] when it was shot down by ground fire. Shortly afterwards, a pair of [[Spirit]] dropships converged on the Marines by the landing zone, overwhelming them on the exposed terrain of the beachhead while SPARTAN-117 was still within the bowels of the underground facility. The forces on the beachhead are presumed dead. The lack of a UNSC-held landing zone on the surface of the island meant that Echo 419 could not extract SPARTAN-117 and his vital intelligence. However, Cortana finds that there is a massively honeycombed system of massive open corridors that permeate the ground of Installation 04, allowing a vehicle that entered the system to travel essentially anywhere undetected. Echo 419 is able to slip into the system and rescue SPARTAN-117.  Using this system, SPARTAN-117 was able to be transported to the installation's Control Room<ref>''[[Halo: Combat Evolved]]'', ''[[The Silent Cartographer (Level)]]''</ref>.
===Infantry weapons===
[[File:UNSC marine American2.png|thumb|250px|left|A marine with the M7 SMG.]]
The standard issue weapon for UNSC Marine Corps is [[Misriah Armory]]'s [[MA5 series|MA5 assault rifle series]], which can be outfitted with an [[M301 grenade launcher]] or an [[underslung shotgun]].<ref>[http://halo.bungie.net/news/content.aspx?type=topnews&link=BAGAssaultRifle '''Bungie.net''': ''MA5C Assault Rifle'']</ref> Marines were issued with the [[MA5B assault rifle|MA5B variant]] or the [[MA5C assault rifle|MA5C variant]], with the former being nearly universally phased out and replaced by the latter in late 2552.<ref name="enc318">'''Halo Encyclopedia: The Definitive Guide to the Halo Universe''', ''page 318'' (2011)</ref> After the end of the Human-Covenant War, both previous variants were phased out and replaced by the  [[MA5D assault rifle|MA5D]]. The [[BR55 battle rifle]] and [[BR55HB battle rifle|its heavy barrelled variant]] are used both as standard service rifles and as marksman's weapons. Their successor models, the [[BR85 battle rifle|BR85]] and [[BR85HB battle rifle|BR85HB]] variants were introduced in the postwar period, with the majority of the Corps favoring the more recent versions as the best models of the battle rifle.<ref>'''Halo 4: The Essential Visual Guide''', ''page 61''</ref> Furthermore, the UNSC Marine Corps has adopted the [[M395 Designated Marksman Rifle|M395 DMR]], though previous models have been eclipsed in the Marines by the prominence of the BR55 battle rifle and its variants. The [[M392 DMR]] also remains in service with Marine reserve units.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/dmr '''Halo Waypoint''': ''DMR'']</ref> The Corps issues several models of the [[M6 series|M6 handgun series]], with its standard sidearm being the [[M6H]] as of [[2555]], with the improved M6H2 entering service by 2557.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/magnum '''Halo Waypoint''': ''Magnum'']</ref> [[Special operations]] and vehicle crews are issued [[M7 SMG|M7 submachine gun]]s, with [[Orbital Drop Shock Troopers|ODSTs]] typically using the [[M7S SMG|suppressed model]].<ref>[http://halo.bungie.net/projects/halo3/content.aspx?link=h3smg '''Bungie.net''': ''M7 / Caseless Submachine Gun'']</ref>


[[Sniper]]s operate the [[SRS99C-S2 AM sniper rifle|SRS99C-S2 AM]] and [[SRS99D-S2 AM sniper rifle|SRS99D-S2 AM]], and more recently the [[SRS99-S5 AM sniper rifle|SRS99-S5 AM]], sniper rifle variants for anti-matériel and anti-personnel operations.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/sniper-rifle '''Halo Waypoint''': ''Sniper Rifle'']</ref> The [[M99 Special Application Scoped Rifle]] was also formerly used as a dedicated anti-matériel weapon.<ref name="HGN122">'''[[Halo Graphic Novel]]''', ''[[Halo Graphic Novel, Page 122|Page 122]]''</ref> Standard UNSC [[Sniper-spotter team|sniper teams]] consists of two operators; a spotter and a sniper. The [[M45 shotgun|M45]] and [[M90 shotgun]]s are often utilized in close-quarters engagements. Once the weapon that defining the Marine Corps as the [[Unified Earth Government]]'s spaceborne force-in-readiness, the Marine Corps has relegated the shotgun to less-visible duties with [[Naval boarding|boarding]] parties, though the shotgun still remains an important weapon of close-quarters warfare.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/shotgun '''Halo Waypoint''': ''Shotgun'']</ref> The [[M739 SAW]] was also adopted in squad-support role.<ref>'''Halo 4: The Essential Visual Guide''', ''page 58''</ref>
Captain Keyes's team, meanwhile, landed near the site of the supposed "weapons cache".  The two Marine teams cleared the Covenant defenses and began to search the underground facility where the arms were supposedly stored. One team stayed back while the other team, led by [[Staff Sergeant]] [[Johnson]], searched the facility. Eventually, they ran across a door that had been electronically locked by the Covenant. Keyes ordered the door be opened. Shortly after entering the room, however, the advance team, including Captain Keyes, was attacked by parasitic organisms called [[Flood]]. [[Staff Sergeant]] [[Johnson]] managed to escape after the Flood [[Infection Forms]] took over his fellow Marines.  Supposedly his body was unsuited for infection due to the affects of [[Boren's Syndrome]].  [[Private]] [[Bisenti]] would also survive the attack. Due to a failed infection attempt, [[Private First Class]] [[Jenkins]] was infected but had control over his consciousness and some body functions. [[Jenkins]] was later captured and interrogated by UNSC forces.


Anti-armor fire is provided by the [[M41 SPNKR|M41 "SPNKR" rocket launcher]], and more recently the [[M57 Pilum]].<ref>[https://www.halowaypoint.com/en-us/universe/weapons/rocket-launcher '''Halo Waypoint''': ''Rocket Launcher'']</ref> The Marines also uses the [[M6 Spartan Laser]], though typically only ODSTs were issued these weapons prior to 2552 due to the high costs of the Spartan Laser at the time.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/spartan-laser '''Halo Waypoint''': ''Spartan Laser'']</ref> The Marine Corps also utilizes the [[XM510 grenade launcher]].<ref name="Halo Wars OSG">'''[[Halo Wars: Official Strategy Guide]]''', ''page 35''</ref> Suppressive fire is provided by the [[M247 machine gun]], the [[M247H machine gun]], the [[AIE-486H machine gun]], and mounted versions of the [[M41 Vulcan|M41 "Vulcan"]].<ref>'''Halo: The Essential Visual Guide''', ''page 115''</ref> The [[M6634 flamethrower|M6634]] and [[M7057 flamethrower|M7057]], two variants of the [[NA4 flamethrower]], are sometimes used in an anti-infantry role by specialists known as [[Hellbringers]].<ref>'''Halo: The Essential Visual Guide''', ''page 69''</ref> The [[M9 fragmentation grenade]] is the standard-issue hand [[grenade]] of the UNSC Marine Corps.<ref>[http://halo.bungie.net/projects/reach/article.aspx?ucc=ordnance&cid=28441 '''Bungie.net''': ''Grenade'']</ref> Several specialized grenades, as well as numerous types of landmines and explosive charges, are also used by Marine infantry. By [[2557]], the [[M363 sticky detonator]] and [[ARC-920 railgun]] have been added to the heavy weapons armory of the UNSC Marine Corps.<ref>[https://www.halowaypoint.com/en-us/universe/weapons/railgun '''Halo Waypoint''': ''Railgun'']</ref>
[[Cortana]] had already learned of the threat the Flood was and sent [[SPARTAN-117]] to save Keyes. However, the Spartan would only find Jenkins' helmet and it's mission log. When he finally evacuated, he ran into a surviving squad of  Marines and began retreating with them to a nearby structure, whilst being assaulted by Flood Combat forms. After securing an LZ for dropship Echo 419, he would then disappear after encountering [[343 Guilty Spark]].<ref>''[[Halo: Combat Evolved]]'', ''[[343 Guilty Spark (Level)]]''</ref>.  


===Ground vehicles===
Meanwhile, Alpha Base came under heavy attack from a Covenant force. The Covenant had identified that SPARTAN-117 was responsible for the majority of the hundreds of casualties during the raid on the ''[[Truth and Reconciliation]]'', and an ambitious [[Special Operations Elite]] named [[Zuka 'Zamamee]] was tasked with leading a platoon of Special Operations Elites into the bowel of Alpha Base to assassinate the [[SPARTAN-II]] while a much larger Covenant force distracted the UNSC defenders. Using a captured Pelican dropship, [[Charlie 217]], 'Zamamee infiltrates the UNSC HQ, but SPARTAN-117 is nowhere to be found. Meanwhile, [[Spirit]] dropships hit the UNSC defenses, but are thrown back by massive amounts sniper rifle fire and several [[Scorpion Tank]]s. Furthermore, the ODSTs organize several hunter-killer teams to re-secure the HQ, murdering all the Special Operations Elites save 'Zamamee, who is able to rescue a UNSC-captured Grunt named [[Yayap]] and escape with Yayap in a [[Banshee]] fighter<ref>''[[Halo: The Flood]]'', page 220</ref>.
[[File:H2A - Warthogs.jpg|thumb|250px|Marines driving Warthogs through Mombasa.]]
The Marine Corps makes heavy use of the [[M12 Warthog|M12 Force Application Vehicle]], or Warthog, which is used for armored patrols, personnel mobility, and combat fire-support. The Warthog is produced in several variants. The most common of these variants is the [[M12 LRV|M12 Light Reconnaissance Vehicle]], which is armed with an [[M41 Vulcan|M41 Light Anti-Aircraft Gun]], or the later [[M46 Vulcan|M46 Light Anti-Aircraft Gun]]. Postwar Marines have begun to utilize the re-armed M12B model of Warthog, equipped with the [[M343A2 chaingun]]. Light anti-vehicle support is provided by the [[M12G1 Gauss Warthog|M12G1 Light Anti-Armor Vehicle]], armed with either the [[M68 Gauss Cannon]] or the more recent [[M70 Gauss cannon]], the [[M12A1 Rocket Warthog|M12A1 Light Anti-Armor Vehicle]], which is mounted with a [[M39 rocket turret|102mm SC-HE Rocket Turret]], and the [[M12R Rocket Warthog|M12R Light Anti-Armor Vehicle]], which features an [[M79 rocket launcher|M79 Multiple Launch Rocket System]] or updated [[M80 missile launcher|M80 Multiple Launch Rocket System]]. The [[M831 Troop Transport]] serves as a fast, lightly armored transport vehicle. The [[M274 Ultra-Light All-Terrain Vehicle]] is commonly used for scouting and light target interdiction.


For heavy engagements, the Marine Corps operates the older [[M808B Scorpion|M808B]] and more recent [[M808C Scorpion|M808C]] variants of the [[M808 Scorpion|M808 "Scorpion" Main Battle Tank]], which is armed with an [[M512 smooth-bore high-velocity cannon]] and a pintle-mounted [[M247T machine gun|M247T Medium Machine Gun]] (M808C) or coaxial [[M231 machine gun|M231 Machine Gun]] (M808B). More recently following the Requiem Conflict, however, the Marine Corps has begun to adopt the updated [[M820 Scorpion|M820 Scorpion Main Battle Tank]], which is armed with a 150mm M990 electrothermal-chemical smoothbore cannon and an as-of-yet unidentified pintle-mounted heavy machine gun.<ref>https://www.halowaypoint.com/en-us/universe/vehicles/scorpion</ref> In smaller numbers, the Marines also deployed the heavier dual-[[M310 smooth-bore high-velocity cannon]] wielding [[M850 Grizzly|M850 "Grizzly" Main Battle Tank]] throughout the Insurrection and Human-Covenant War, but postwar logistical issues led the Marine Corps to retire it.<ref>[https://www.halowaypoint.com/en-us/universe/vehicles/grizzly '''Halo Waypoint''': ''Grizzly'']</ref> The [[M9 Wolverine|M9 Wolverine Main Anti-Air Tank]] (MAAT) is the Corps' primary mobile anti-air asset. The [[SP42 Cobra|SP42 Cobra Main Battle Tank]] fills the role of tank destroyer and anti-fortification light artillery support. The [[M312 Heavy Recovery Vehicle]] and [[M313 Heavy Recovery Vehicle]] provides heavy matériel recovery and troop transport.
==== Containment ====


Less standard vehicles also saw service with the Marine Corps during the Human-Covenant War. The [[M-145D Rhino]] was outfitted with a reverse-engineered [[plasma mortar]]. The [[XRP12 Gremlin|Gremlin Combat Support Vehicle]] is used to disable enemy vehicles with its onboard EMP weapon. The [[Cyclops]] support exoskeleton was used both repair duties and logistical support, as well as in combat, though it was eventually retired from service. In recent years, the [[HRUNTING/YGGDRASIL Mark IX Mantis|Mantis]] has been utilized by the Marines, with the Corps having contracted [[Materials Group]] to produce a refit package to allow alternate loadouts on the walker.<ref>[https://www.halowaypoint.com/en-us/universe/vehicles/mantis '''Halo Waypoint''': ''Mantis'']</ref>
While SPARTAN-117 journeyed through various areas in Installation 04, [[Cortana]] was able to briefly contact Alpha Base, informing them that SPARTAN-117 will use the ''Pillar of Autumn'''s fusion reactors to trigger a thermonuclear explosion that would destroy Installation 04. However, the explosion would kill all life on the ringworld if the UNSC forces failed to escape before the detonation.  Major Silva came up with an daring plan: to recapture the damaged ''Truth and Reconciliation'', already taken to launch readiness by a Covenant repair team, and to use it to escape the ring while SPARTAN-117 sets off the delayed thermonuclear reaction and escapes as well. Afterwards, SPARTAN-117 will rendezvous with the UNSC-controlled ''Truth and Reconciliation'' and then they will return to [[Earth]], heralding a glorious victory for the UNSC: a superweapon destroyed, a Covenant armada annihilated, and the first Covenant warship ever captured.  


===Aircraft===
However, this plan was not perfect. Alpha Base's contingent learned of the [[Flood]] as a brief skirmish with nearby Covenant patrols leads to an exaggerated battle as the Flood attack, and the UNSC personnel are mostly horrified by the Flood's combat potential and viciousness.<ref>''[[Halo: The Flood]]'', page 251</ref> After it was learned that Flood are aboard the ''Truth and Reconciliation'', ODST [[Lieutenant]] [[McKay]] and UNSC AI [[Wellsley]] were convinced that the UNSC survivors should not risk severe casualties boarding a Flood-held starship...and even if they prevail and bring the warship to Earth, if any Flood managed to invade Earth, it would "fall"<ref>''[[Halo: The Flood]]'', page 317</ref><ref>''[[Halo: The Flood]]'', page 331</ref>. However, Silva, the commanding officer of all of Alpha Base's forces after Keyes's tragic death, demurs, and instead assaults the ''Truth and Reconciliation'', with his ODST special forces operators securing the ship with minimal casualties and the non-combat personnel in tow. Surviving senior naval officers from the ''Pillar of Autumn'' are sent in after the ODSTs deem the warship as "secure", and they move swiftly to undersee last-minute repairs to the ''Truth and Reconciliation'' before it takes off.
[[File:HW2 MarineDeployment Concept.png|thumb|250px|UNSC Marines preparing for deployment.]]
The Marine Corps' most common aircraft is the [[Pelican]] dropship. The Pelican is used as a multirole aerodyne which is capable of carrying numerous armament configurations, including [[Scorpion missile|Scorpion anti-tank missiles]], [[ANVIL-II Air-to-Surface Missile|Anvil II air-to-surface missiles]], as well as a chin-mounted 7.62mm machine gun, or a 40mm or 70mm autocannon. The Pelican can also be outfitted with an M247 or AIE-486H machine gun in its troop bay.


The UNSC Marine Corps operates the [[GA-TL1 Longsword]] as its primary fighter/interceptor and as a tactical bomber. The Corps also operates the [[B65 Shortsword|Shortsword-class Bomber]], which serves as a close air support aircraft. The Marines utilize the [[AV-14 Hornet]] as a light attack craft and gunship. Earlier in the war, the Marines also utilized the [[AV-22 Sparrowhawk]] as a close air support gunship, though it was largely retired from service due to problems with its propulsion system. Currently, the [[AV-49 Wasp]] supplements the Marine Corps' existing stocks of AV-14 and AV-22 aircraft.<ref>[https://www.halowaypoint.com/en-us/news/canon-fodder-buzz-generating '''Halo Waypoint''': ''Canon Fodder - Buzz Generating'']</ref> Heavy air-to-ground support is provided by the [[AC-220 Vulture]] gunship. Marine air units are usually intended to support ground forces or to drop off vital equipment for the Marines, either in close-air-support or air interdiction roles.<ref>''[[Halo: Spartan Strike]]''</ref>
However, McKay still holds doubt - even if the ''Truth and Reconciliation'' took off successfully and reached Earth without incidence, the pandemiological threat of the Flood meant that if even one parasite managed to infect a human on Earth, it would be a disaster of a galactic scale. McKay, in conscience, is forced to damage the ''Truth and Reconciliation'''s reactors and destroy the warship, killing herself and all 312 UNSC personnel and surviving Flood beings onboard<ref>''[[Halo: The Flood]]'', page 332</ref>, thereby destroying nearly all of the UNSC presence on the ring.


==Gameplay==
==== Escape ====
===''Halo Wars''===
Marines are a playable unit in ''Halo Wars'' that can be built from a [[Barracks]] for 100 resources and one population slot. Armed with MA5B assault rifles and have the ability to throw M9 frag grenades. Marines are a jack of all trades, master of none-type unit typically used to counter aircraft. Marines have the following upgrades:


*''New Blood'': Adds another Marine to the squad. Costs 200 resources and a tech level of 1.
While almost all of Alpha Base's personnel are eliminated in the tragic self-detonation, [[Avery J. Johnson]] did not make it onto the ''Truth and Reconciliation'' after surviving the Flood attack.  He was able to join three other UNSC personnel that were, likewise, not aboard the ''Truth and Reconciliation'' as well: [[Office of Naval Intelligence]] [[Lieutenant]] [[Elias Haverson]], ODST [[Corporal]] [[Locklear]], and [[Warrant Officer]] [[Sheila Polaski]]. Together, the four escaped Installation 04 in a [[Pelican Dropship]]<ref>''[[Halo: First Strike]]'', page 48</ref> before SPARTAN-117 set off the thermonuclear detonation, himself escaping in a [[C709 Longsword-class Starfighter|C709 ''Longsword''-class Starfighter]]<ref>''[[Halo: Combat Evolved]]'', ''[[The Maw (Level)]]''</ref>.
*''RPG'': Replaces the M9 frag grenade ability with M41 rocket launchers. Costs 400 resources and a tech level of 2.
*''Medic'': Adds a Medic to the Marine squad allowing the unit to heal itself after battle. Costs 700 resources and a tech level of 3.
*''ODST'': Turns all Marines into ODSTs (only available if [[James Cutter|Captain Cutter]] is the leader). Armed with M90 shotguns, ODSTs are able to be dropped in from drop pods. Costs 1800 resources and a tech level of 3.


===''Halo Wars 2''===
After Installation 04's destruction, [[Cortana]] conducted a scan of the interstellar debris of Installation 04, and found an echo of Polaski's dropship. SPARTAN-117 was able to link up with the four other UNSC survivors of the cataclysm, but seven Covenant warships: six [[Covenant Cruiser]]s and one 3-kilometer [[Covenant Flagship]], entered the system and opened fire at the  fighter and the Pelican. SPARTAN-117 ordered everyone into the Longsword while the Pelican was sent ahead as bait, drawing plasma fire from the Covenant starships while [[Cortana]] remotely hacked into the Covenant taskforce's [[Battlenet]], causing electronic mayhem that temporarily stunned the weapons aboard the warships while the Longsword, with SPARTAN-117, Johnson, Locklear, Polaski, and Haverson on board, slipped into the hangar of the Covenant Flagship<ref>''[[Halo: First Strike]]'', page 58</ref>.
[[File:Blitz Marines.png|thumb|150px|''Halo Wars 2'' Blitz Card of UNSC Marines.]]
[[Image:Marine.png|thumb|right|[[Corporal]] [[Locklear]] fights the [[Covenant]] with an [[MA5B Assault Rifle]] in the brief battle inside the ''[[Ascendant Justice]]''.]]
*'''Info:''' Core Infantry, Flexible ground troops, Quick capture unit, Effective against air
The small group of unprepared UNSC warriors fight through [[Elite]] defenders while [[Cortana]] slips into the Covenant Flagship's computer systems from a fiber optic port, and then proceeds to drain atmosphere from most segments of the ship, asphyxiating most of the Covenant guards. However, the bridge's crew still remains oxygenated, and seal the doors to the bridge, barricading themselves from the UNSC attackers. This measure is futile: SPARTAN-117 uses a [[plasma grenade]] to electromagnetically scramble the locks to the doors, and the UNSC forces seize the understaffed bridge with minor difficulties...SPARTAN-117's personal energy [[shield]]s fail just as an [[Energy Sword]]-wielding [[Zealot]] appears. SPARTAN-117 has his arm nearly amputated in the resulting wrestle, but Marines Johnson and Locklear are able to severely wound the Zealot, before throwing him into an escape pod and launching it<ref>''[[Halo: First Strike]]'', page 74</ref>.
*'''Tier:''' 0
*'''Cost:''' Population 3, Supplies 150, Power 0
'''Marines upgrade: Grenade throw'''
*'''Info:''' New Ability, Can throw grenades, Small Area Attack, Cannot target air
*'''Tier:''' 1
*'''Cost:''' Supplies 0, Power 400
'''Marines upgrade: Combat Tech'''
*'''Info:''' Unit Upgrade, Adds Combat Technician, Can repair vehicles, Wields rocket launcher
*'''Tier:''' 2
*'''Cost:''' Supplies 0, Power 600
Marines can be built by all UNSC leaders at the [[Firebase]]. They are a jack-of-all trades unit, performing adequately against infantry, vehicles, aircraft, and structures. Marines can no longer upgraded to ODSTs, who are now a [[Orbital Drop Shock Troopers#Halo Wars 2|distinct unit]] that can only be called via Leader Power. In [[Blitz]] Marines cost 10 energy, Extractor Marines cost 50 energy, Reactive Marines cost 50 energy, and Armored Marines cost 60 energy.


===Pro and Cons===
Cortana interfaces with the bridge's navigational controls to let the now UNSC-controlled flagship, ''[[Ascendant Justice]]'', flee from the system, but a Covenant AI counters her, physically disabling the [[Slipspace]] drive of the ''Ascendant Justice'' and preventing Cortana from executing a jump out of the system before the six other Covenant Cruisers vaporize the flagship. SPARTAN-117, however, makes a journey through the damaged warship to kill the [[Grunt]]s guarding the disabled Slipspace drive, and then forces a Covenant [[Engineer]] to repair the drive, allowing Cortana to program the ''Ascendant Justice'' to jump from the system, just barely surviving the bombardment of the six Covenant Cruisers, thus ending the UNSC retreat from the wartorn system<ref>''[[Halo: First Strike]]'', page 87</ref>.
====Pro====
*Jack for all trades, okay against all units.
*Lethal when attack in hordes.
*Cheap to build (150 Supply).
*Only consume 3 population.


====Cons====
===[[First Battle of Earth]]===
*Weak against Siege Weapons.
[[Image:Hotelz2rw.jpg|right|thumb|[[Hotel Zanzibar]] defended by a light Marine fireteam.]]
*Not suited for long-scale combat without a proper upgrade.
[[Image:DSC00123.JPG.jpg|right|thumb|Marines of [["A" Company]] fire at the Scarab walker with a .30-caliber machine gun.]]
{{Clear}}
[[Image:Scarabcannon.jpg|right|thumb|The [[Scarab]] destroys a UNSC Marine Corps [[Scorpion Tank]] in a single shot.]]
[[Image:DSC00124.JPG|right|thumb|[["A" Company]] of the [[405th Marine Infantry Division|405<sup>th</sup> Marine Division]] before attacking the [[Scarab]] walker.]]


==Trivia==
{{Main|First Battle of Earth}}
{{Linkbox|gameplay=yes|quote=yes|gallery=yes|gallerypage=Images of UNSC Marines}}
*The UNSC Marine Corps shares many traits of its culture and organization with the modern [[Wikipedia:United States Marine Corps|United States Marine Corps]]. Like the USMC, the UNSCMC organizes its units into [[division]]s, which are subdivided into [[regiment]]s. Most other military forces of the present day are subdivided into [[brigade]]s. In addition, every known UNSCMC rank corresponds directly to a USMC rank, and the enlisted and officer ranks that have been described imply that exactly the same insignia are used as well. ''Semper Fi'', the [[Latin]] motto used by the USMC, short for ''Semper Fidelis'' ("Always Faithful" or "Forever Faithful") is also used by the UNSCMC.<ref>'''[[Halo: The Flood]]'''</ref> "Ooh Rah", a motivational call originating from the USMC, is often said by Marines of the UNSCMC.
**In the ''[[Halo: Combat Evolved]]'' level ''[[The Truth and Reconciliation]]'', [[Jacob Keyes|Captain Keyes]] tells a Marine to "''Stow your bellyaching, soldier - remember, you're a leatherneck!''" [[Wikipedia:Leatherneck|Leatherneck]] was a nickname earned by US Marines in the era of the [[Wikipedia:Continental Marines|Continental Marines]]. Although an appropriate reference to Marines, the term "Leatherneck" and "soldier" are viewed by their respective service members as being incompatible, and a means of differentiating between service in the Marine Corps or Army.
*The equipment and armor used by UNSC Marines (particularly in ''Halo: Combat Evolved'', resembles those used by the US Colonial Marines in the 1986 film ''[[Wikipedia:Aliens (film)|Aliens]]'', one of many [[List of references to Aliens in the Halo series|similarities]] to the film in the ''Halo'' series. The Marines' equipment also bears some resemblance to the US Army's [[Wikipedia:Future Force Warrior|Future Force Warrior]] program. They also bear a striking resemblance look to the soldiers in [[Wikipedia:Starship Troopers (film)|Starship Troopers]].


==Gallery==
{{Quote|[[UNSC In Amber Clad|We're]] taking [[First Battle of Earth|this fight]] to the [[Earth|surface]].|[[Commander]] [[Miranda Keyes]]}}
===''Halo: Combat Evolved''===
 
<gallery>
The UNSC Marine Corps remained in large force on Earth and its geosynchronous [[Orbital Defense Platform]]s, and were thus mostly prepared to repulse a [[Covenant]] invasion when fifteen Covenant capital warships, two [[Assault Carrier]]s and thirteen [[Covenant Cruiser]]s, entered the Sol System.
File:HCE Marines Concept 1.png|''Halo: Combat Evolved'' concept art.
 
File:HCE Marines Concept 2.png|''Halo: Combat Evolved'' concept art.
Because the large number of orbital Magnetic Accelerator Cannons made it almost impossible for any of the Covenant warships to reach Earth unscathed, the Covenant sent [[Covenant Boarding Craft|boarding craft]] to board numerous Orbital Defense Platforms. The boarders swiftly penetrated the platform's infantry defenders and set bombs in the core of the stations and then detonated them, destroying the defense station inside-out with minimal losses. ''[[Malta Station]]'' and ''[[Athens Station]]'' fell almost immediately to the internal sabotaging,
File:HCE Marine.jpg|A marine in ''[[Halo: Combat Evolved]]''.
 
File:Marines on the Battlefield.jpg|Marines on [[Installation 04]] in ''Halo: Combat Evolved''.
Covenant forces invaded ''[[Cairo Station]]'' as well, the command center for UNSC fleet operations during the battle. The crew of the ''Cairo'' held out longer, albeit with heavy casualties, and Marines and crewmen fought a coordinated holding action, trying to force the boarders out of the peripheral hangars and the intermediate common rooms, but their defenses were penetrated by a small force of [[Elite]]s and [[Grunt]]s that planted a bomb in the Fire Control Center of ''Cairo Station''. Only [[SPARTAN-117]]'s timely reinforcement of the Marine garrison and his assault on the Fire Control Center managed to '''disarm''' the bomb in time, thus saving ''Cairo Station'' from destruction<ref>''[[Halo 2]]'', ''[[Cairo Station (Level)]]''</ref>.
</gallery>
 
However, despite the fact that ''Cairo Station'' and hundreds of others of Orbital Defense Platforms still stood, the loss of the ''Malta'' and ''Athens'' allowed a Covenant Assault Carrier to penetrate the UNSC Navy's defensive web around Earth, and this Assault Carrier attacked [[Mombasa]], [[Africa]].
 
However, the [[405th Marine Infantry Division|405<sup>th</sup> Marine Infantry Division]], some of whose elements were stationed in [[Mombasa]], [[Kenya]] at the time, were able to battle against the Covenant as the Assault Carrier landed [[Phantom]]s, [[Orbital Insertion Pod]]s, and used its [[Gravity Lift]] to directly deploy reinforcements. Furthermore, the {{UNSCShip|In Amber Clad}} was also able to use its [[Pelican]]s to deploy Marines, vehicles, and equipment to assist the 405<sup>th</sup> Marine Division.
 
The ''In Amber Clad'' sent three Pelican Dropships to reinforce and to drop off Marine and ODST fireteams at [[Grid Kilo 23]], where SPARTAN-117 would lead a coordinated Marine assault to liberate the Covenant-contested city center, when the Pelicans were unexpectedly attacked by a Scarab walker en route to their landing zone. Two of the Pelicans were forced to break off when one of the ''In Amber Clad'''s Pelicans, which contained SPARTAN-117 and Sergeant Johnson, crashed into a building.
 
Miraculously, everyone aboard the Pelican save the pilot survived, and SPARTAN-117 was able to rally the Marine passengers, holding a nearby battle-damaged building against multiple Covenant attacks until the Marines could be evacuated at a nearby clearing.
 
SPARTAN-117 meanwhile proceeded to liberate a small ODST force, under [[Gunnery Sergeant]] [[Pete Stacker]], at [[Hotel Zanzibar]], and then fought through a Covenant-controlled tunneled highway.
 
Meanwhile, the Scarab brushed aside Marine defenses, walking over the highway, and then past a large bridge and into the midsection's of the city completely unopposed by Marine small arms fire<ref>''[[Halo 2]]'', ''[[Outskirts (Level)]]''</ref>.
 
SPARTAN-117 and a small team of Marines pursued the lumbering walker, fighting through long segments of Covenant-controlled city locations until reaching the city center, where [["A" Company]] of the [[77th Marine Regiment|77<sup>th</sup> Marine Regiment]] defended against waves of Covenant [[Ghost]]s, [[Wraith]]s, and [[Phantom]]s in a fortified industrial building.
 
Completely undeterred by UNSC Marine Corps [[Scorpion Tank]]s or machine guns, the Scarab too brushed aside "A" Company in its fortified building, until it was caught in a nearby canal system and physically trapped. Pelicans commenced air strikes on the trapped walker, but the armor was barely scarred, and there was no other choice but to board the Scarab itself and destroy internally. While "A" Company's remnants provided suppressive fire, [[SPARTAN-117]] jumped aboard the enemy walker, killing its crew and destroying it<ref>''[[Halo 2]]'', ''[[Metropolis (Level)]]''</ref>.
 
===[[Battle of Installation 05]]===
{{Main|Battle of Installation 05}}
 
{{Quote|[[Installation 05|That]]...is another [[The Halos|Halo]].|[[Cortana]]}}
{{Quote|Say what?!|[[Sergeant Major]] [[Avery Johnson|Avery J. Johnson]]}}
[[Image:Hevstohalo05.jpg|right|thumb|[[Human Entry Vehicle]]s from the {{UNSCShip|In Amber Clad}} insert into the atmosphere of [[Installation 05]].]]
 
After the [[Slipspace]] cataclysm over [[Mombasa]] involving the [[Prophet of Regret]]'s [[Assault Carrier]], {{UNSCShip|In Amber Clad}} pursued the Prophet of Regret's carrier through [[Slipspace]] to [[Installation 05]] (Delta Halo), where Regret was determined to sermonize and then activate the ring world and bring about [[The Great Journey]] to all of the [[Covenant]] and lead them to a believed transcendence.
 
While the carrier sent [[Phantom]] dropships to the surface to land the [[Covenant Army]] in the immediate area and to allow Regret to begin his religious ceremony in a Forerunner temple before activating the ring, the ''In Amber Clad'' passed over the approximate position where Regret's temple was, deploying ten [[Human Entry Vehicle]]s, and shortly afterwards, a flight of Pelican Dropships.
 
While only a handful of HEV pods survived the insertion, the surviving ones contained [[SPARTAN-117]] and several heavily armed [[Orbital Drop Shock Trooper]]s. Together, they cleared a small area of [[Shielded Plasma Cannon]]s and a small group of Covenant soldiers, establishing an LZ for a Pelican Dropship to deploy an [[M12 Warthog LRV]] and another pair of ODST operators.
 
SPARTAN-117 took the Warthog, and with the help of the ODSTs, fought through a Covenant-controlled bridge before another Pelican deployed a M808B Scorpion MBT that provided extra firepower for a UNSC offensive to push through two large Forerunner temple ruins, where yet a third Pelican from the ''In Amber Clad'' dropped off weapon resupplying drop pods and Marine reinforcements.
 
After battling through a ravine entrenched by aerial [[Drone]]s and [[Jackal Sniper]]s, the UNSC force reached a small Forerunner temple, where SPARTAN-117 and two remaining Marines fought off a pair of [[Honor Guard Elite]]s<ref>''[[Halo 2]]'', ''[[Delta Halo (Level)]]''</ref> before continuing onwards through a series of closed temples before reaching an open circular platform where a fourth Pelican was scheduled to air-drop additional armaments.
 
However, before that could happen, SPARTAN-117 and whatever surviving Marines were attacked by an airborne [[Phantom]] dropship that deployed two heavy [[Hunter]] warriors that savagely assailed the UNSC personnel before they were fought off and the fourth Pelican arrived to bring [[BR55 Battle Rifle]]s, Sniper Rifles, and [[M19 SSM Rocket Launcher]]s. SPARTAN-117 continued to take a gondola from the open platform, fighting off enemy [[Banshee]] fighters and [[Ranger Elite]]s to reach a series of submerged temple structures and finally another gondola to the temple where Regret was sermonizing.
 
SPARTAN-117 and his Marines began fighting off [[Energy Sword]]-armed [[Honor Guard Elite]]s, managed to assassinate the Prophet of Regret before the [[Prophet of Truth]] and [[Prophet of Mercy]] ordered an Assault Carrier to use an [[Energy Projector]] to vaporize the temple in a vain attempt to kill the "Demon", afterwards which contact was lost with SPARTAN-117 and whatever remaining Marines that were accompanying him at the time.
 
Meanwhile, at ''[[High Charity]]'', the [[Changing of the Guard]] occurred, and the [[Arbiter]] was deployed to the [[Sentinel Wall]]<ref>''[[The Official Halo 2 Strategy Guide]]'', page 118</ref> to deactivate the containment shield that prevented any being from journeying to the [[Library]] and retrieving the [[Index]]. After the Containment Shield was deactivated, apparently a company-sized Marine unit was sent to the Flood-Infested Wall<ref>''[[The Official Halo 2 Strategy Guide]]'', page 115</ref><ref>''[[Halo 2]]'', ''[[Sacred Icon (Level)]]''</ref> to try to make their way to the Library, but were overwhelmed by the Flood and assimilated.
 
However, while the Arbiter punched through heavy Flood defenses surrounding the Library, the UNSC tried again to attack the [[Library]] and secure the [[Index]] to ensure that the Covenant would not use it to activate Installation 05 and cleanse the galaxy of sentient life in their misguided religious quest. While the Arbiter cleaned out the Flood infestation barring way to the Library, the UNSC were able to slip a small force of Marines directly next to the Forerunner structure, who managed to infiltrate it, but took casualties from [[Flood infection form]]s.
 
At the end, only [[Miranda Keyes]] and [[Avery Johnson]] survived, but while Commander Keyes secured the Index, the [[Arbiter]] managed to race into the Library, incapacitating Perez and MacKenzie before launching a sneak attack on Johnson and Keyes, knocking them both unconscious before securing the Index for the Covenant<ref>''[[Halo 2]]'', ''[[Quarantine Zone (Level)|Quarantine Zone]]''</ref>.
 
===[[Battle of High Charity]]===
 
{{Main|Battle of High Charity}}
 
However, [[SPARTAN-117]] had survived the Covenant vaporization of Regret's Temple, but had a more insidious fate: deceived by the Flood overlord creature known as the [[Gravemind]], he became the Flood's pawn, being teleported to ''[[High Charity]]'' in an attempt to battle through legions of Covenant troops to capture or kill the [[Prophet of Truth]] and secure the Index to ensure that Truth would not activate Halo.
 
Early on during the Battle of ''High Charity'', however, [[Cortana]] detected the [[CNI]] wave signatures of several UNSC Marines inside the bowels of ''High Charity''. SPARTAN-117 took a short detour, launching an attack on a four-story Covenant detention facility and rescuing five Marine prisoners from a pair of heavily guarded Covenant detention blocks, who aided him in his battles through ''High Charity''.
 
In the end, however, none of the Marines survived, and the [[Prophet of Truth]] escaped from SPARTAN-117's grasp, fleeing in a Phantom dropship while [[Tartarus]], Chieftain of the Brutes, took the imprisoned Keyes and Johnson, along with a cohort of [[Honor Guard Brute]]s, in two separate [[Phantom]]s to Installation 05, where Tartarus planned to use the Index to activate Halo at the Control Room of Installation 05<ref>''[[Halo 2]]'', ''[[Gravemind (Level)]]''</ref>.
 
Meanwhile, the ''In Amber Clad'' had not fared well after Keyes's team's departure from the frigate. Flood forces managed to storm aboard by unknown means, killing the human crew and using their unprecedented sentience to crew the ship. They managed to crash it onto a high tower on ''High Charity'', spreading Flood into the Covenant planetoid. With the Pelican dropships which provided the Flood with extensive routes to invade ''High Charity''.
 
A number of its crew were assimilated into the insular of the parasite, fighting against SPARTAN-117 as the Master Chief battled through a Flood-infested ''High Charity'' to secure access to the [[Forerunner Ship]]<ref>''[[Halo 2]]'', ''[[High Charity (Level)]]''</ref>.
 
While Tartarus took the Index and Miranda Keyes in one Phantom to the Control Room, the other Phantom, carrying Johnson, diverted its route...when Johnson apparently managed to overpower the Brute crew and escape the Phantom, managing to slip through to an inactive [[Scarab]] walker while two nearby Marines, most likely [[Sergeant Stacker]] and [[Sergeant Banks]], fought off a large pack of [[Brute Captain]]s with [[Plasma Pistol]]s. These two Marines were saved when the [[Arbiter]] arrived, slaying the Brutes.
 
However, Johnson pointed the Scarab's main cannon at the Arbiter...but not in bad will. The Arbiter and Johnson made a truce. Johnson would use the main cannon of the Scarab to punch a hole in the surface of the Control Room while the Arbiter would charge in with a [[Banshee]] and defeat Brute Captains and Brute Honor Guards before confronting [[Tartarus]] while Johnson would unmount from the Scarab, joining a large number of [[Covenant Separatist]] [[Councilors]], [[Zealots]], and [[Special Operation Elite]]s in aiding the Arbiter to kill Tartarus and prevent him from using the Index to activate Halo.
 
However, Tartarus put up a significant resistance, and despite being heavily outnumbered by the Arbiter's Elite comrades, used his personal energy shield and the gargantuan [[Fist of Rukt]] to defend himself. In the end, however, Tartarus was unsuccessful.
 
Johnson used his exceptional marksmanship with a sniper rifle to take down Tartarus's powerful shields from afar with a [[Particle Beam Rifle]] while the [[Arbiter]] and his allies attacked the unshielded Tartarus, finally killing him and bringing an end to the Chieftain of the Brutes and preventing the firing of the Halos, terminating the UNSC Marine Corps's involvement at Installation 05.
 
===[[Second Battle of Earth]]===
[[Image:Halo 3 Marines.png|right|thumb|Five Marines take cover in the jungles around [[Voi]].]]
 
The UNSC Marine Corps had a substantial involvement in the defense of Earth during the Second Battle of Earth, being the majority of the UNSC's ground defenses when the Covenant landed on Earth in multiple locations, which included the continent of [[Africa]].
 
A scattered Marine presence appeared to remain in force in the immediate vicinity of [[New Mombasa]], where a [[Slipspace]] disaster wiped off a significant number of Marine assets, including at least a portion of the [[405th Marine Infantry Division|405<sup>th</sup> Marine Infantry Division]].
[[Image:UNSC Marine.jpg|right|thumb|A Marine in the UNSC base of Crow's Nest]]
[[Marine]] forces managed to hold out in an underground base, waging a guerilla war against the [[Covenant]] occupiers of East Africa for some time before the [[Master Chief]]'s arrival from onboard the [[Forerunner Dreadnaught]] <ref>Sierra 117 (level)</ref>. After his recovery, Marine forces prepared to launch an offensive against the Covenant and reach what they thought to be the [[Installation 00|Ark]]. Unfortunately, the Covenant found them first, and assaulted the base with heavy numbers of infantry. The Marines, Master Chief, and the Arbiter managed to fend them off long enough to evacuate the remainder of the survivors, and destroyed the base rather than let the Covenant learn of their plan<ref>Crows Nest (level)</ref> - the Master Chief personally led a small number of Marines along the Tsavo Highway, penetrating through numerous blockades and passing patrols of [[Type-25 Rapid Assault Vehicle|Choppers]] and [[Wraiths]], eventually reaching the town of Voi<ref>Tsavo Highway (level)</ref>. Once at Voi, the Master Chief and the marines began their operation - destroying anti-air emplacements to allow Pelican dropships to insert more UNSC forces, including the Arbiter. One emplacement from a perimeter of heavy [[Covenant Air Artillery|Anti-Air Artillery]] was disabled, allowing UNSC [[C709 Longsword-class Interceptor|Longsword]] Fighters and [[UNSC Frigate|Frigates]] to attack the [[Forerunner Dreadnaught]]. The [[Prophet of Truth]], however, activated a portal over the "ark," leading to the true facility - and a Covenant Cruiser made a pinpoint slipspace jump in-atmosphere above Voi, infected by the [[Flood]]
[[Image:Marine Ambush.jpg|thumb|Four Marines near Tsavo Highway.]]
The [[Unnamed Marine Lieutenant|Marine Lieutenant]] commanding forces in Voi soon was forced into a brutal firefight against the Flood, in which he and all of the Marines in his command post were infected, save for [[Suicidal Marine|a single survivor]].
 
Spartan-117, having destroyed the AA turret, reentered Voi with the Arbiter, and began attacking the Flood and rescuing Marine survivors. Despite his best efforts, only five Marines, not counting the traumatized survivor of the raid on the CP, were rescued. About midway to the crash site of the Flood-controlled ship, the unlikely rescuers of the humans, the First Sangheilian Fleet under [[Rtas 'Vadum]], arrived, and deployed [[Special Operations Sangheili]] to assist in the cleansing of the city. The Marines that the Chief had rescued fell back, and were transported to the Forward Unto Dawn. This ended the UNSC Marine Corps' involvement at Earth.
 
===[[Battle of Installation 00]]===
 
==== Exploration and Touchdown ====
 
{{quote|All armor form up, hit 'em where it hurts!|[[Gunnery Sergeant]] [[Pete Stacker]], leading a Scorpion platoon on the Ark|The Ark (level)}}
[[Image:7thHelljumpers.jpg|thumb|ODSTs from the 7th Battalion advance along the Ark]]
[[Image:Corporal Wu.jpg|thumb|A Marine sharpshooter on the Ark]]
Following negotiations between Admiral Hood and Rtas 'Vadum onboard the Sangheili flagship [[Shadow of Intent]], it was agreed that the Sangheili, plus the Forward Unto Dawn and her Marine complement, would follow Truth through the Portal to the Ark.
 
Upon emerging from the Portal, the Sangheili fleet encountered a [[Jiralhanae]] fleet three times their size. With 'Vadum's ships holding the line against Truth's fleet, Spartan-117, the Arbiter, and a combined Marine-ODST task force under Sergeants [[Avery Johnson]], [[Reynolds]], and [[Pete Stacker]] landed on the Ark.
 
Spartan-117's first objective was to clear AA defences so Commander Keyes could set down the Dawn; he was dropped off with four ODSTs near the first Covenant battery. They proceeded to knock it out, and linked up with two Marines whose Pelican had been shot down. The impromptu assault team hijacked a Jiralhanae Prowler, commandeered a Mongoose from the wreck of the Pelican, and headed out to the last AA battery. Once it was destroyed, Commander Keyes set down the dawn, and deployed Bravo Team, an armored of four Scorpions under Gunnery Sergeant Stacker, plus 343 Guilty Spark.
 
The armored platoon forged ahead, and managed to penetrate a wall seperating Spartan-117 from his objective: a Cartographer similar to the one found on [[Installation 04]]. However, a Scarab, a Phantom, and several Wraith tanks were in the way. Bravo Team managed to skillfully bludgeon their way through the Covenant defences, and Spartan-117 managed to arrive at the Cartographer building, discovering that Truth was holed up in a Forerunner Citadel in the center of the Ark.
 
==== Pathfinding and Confrontation ====
 
Upon the discovery of Truth's location, a flight of five [[Pelican]]s and two Separatist [[Phantom]]s made way to the Citadel. They split up into three groups; the Arbiter led his two Phantoms' worth of Elites, Avery Johnson led a duo of Pelicans filled with Marines, and the Master Chief took another two Pelicans holding [[ODST]]s. Their goal was to split up and quickly deactivate the three shield generators surrounding the Citadel. [[Miranda Keyes]] held back and waited to give the Master Chief's team support, fearful of the Anti-Air Wraith guarding their insertion point. Her fears were justified when one of the two Pelicans of the Master Chief's team was shot down. The remaining bird landed the Chief and just three ODSTs to take out the [[Brute]] position and disable the Wraith. Through much hardship and desperation they did just that, and awaited Miranda Keyes' reinforcements of three more Marines, a [[Warthog]] and a [[Mongoose]]. The mounted strike force then fought their way to the interior of the island, towards one of the three generators the battle group was tasked with taking out.
 
The Master Chief and his team proceeded inside the generator complex, fighting a myriad of loyalist Covenant along the way. The Chief made his way up to the control center, slew a pack of Brutes including a [[Brute Chieftan]], and deactivated the generator. Approximately that same moment, the Arbiter and his Elites deactivated their generator as well. Expecting the third station to fall along with them, Miranda and the Chief were shocked to hear that Johnson's team of Marines was being overwhelmed by Brute reinforcements and were forced to fall back. Keyes rallied the other two strike teams and ordered them to finish the job that Johnson's team had started.
 
The team being led by the Master Chief sped back down to their original landing zone, and were picked up by a flight of [[Hornet]]s. Assisted by the remaining two Pelicans, they all battled their way through stiff Covenant air resistance and saw the massive enemy force that had understandingly subdued the now apparently vanished Johnson's team. A vicious landing operation commenced, and the whole cliffside station was violently cleared for the Master Chief and remaining Elites (including the Arbiter)to storm the generator complex and deactivate the final power source.
 
As the shield went down, a fully flood-consumed [[High Charity]] burst out of slip-space (presumably from the portal on earth) onto the Ark. A number of pieces of debris smashed through the Elites cruiser, severely damaging it. A chunk of infested debris also smashed through the complex, and the Chief fought the flood as he got back outside to the deployment zone.
 
Upon his arrival, Keyes had delivered a [[Scorpion]], a [[Gauss Warthog]], and a few [[Mongooses]] for him to use as he led the remaining Marine ground force and a handful of Elites to the interior of the island and begin the siege of the Citadel. The mounted and heavily armed task force battled their way down the Covenant fortified cliffside and were then met by a terrifying welcome party of two [[Scarab]] tanks. The remaining airborne force of Pelicans and Hornets assisted the Chief's team as they fiercely fought and destroyed this last line of defense.
 
The Master Chief and the Arbiter then proceeded into the Citadel to rescue Johnson and kill the Prophet of Truth, but only after Miranda Keyes' desparate rescue attempt got herself sorrowfully killed. Johnson escaped to [[Forward Unto Dawn]] on Miranda's Pelican, and the Master Chief and the Arbiter continued to fight their way out, escaping the Flood and the Covenant. The remaining marines and elites were withdrawn to the [[Shadow of intent]] as the Master Chief ventured into the remains of High Charity in search of Cortana.
 
Later, Avery Johnson's exploits aided in the final destruction of the reborn Installation 04 and the Flood, giving his life for Humanity and the Arbiter along the way.
 
As [[Forward Unto Dawn]] crash-landed into water mass on Earth, marines (likely those that did not travel to the Ark, or had remained behind with [[Lord Hood]]) helped the Arbiter out of the wreck, and also participated in the memorial ceremony near the Ark Portal. It is likely that Marines were involved in peacekeeping and aid missions on Earth, or sent into space to battle against and remaining Covenant Loyalist forces.
 
== Equipment ==
===Armor===
[[Image:Marine.jpg|thumb|right|A Marine in full brown/gray combat body armor and armed with an [[MA5B Assault Rifle]] in ''[[Halo: Combat Evolved]]''.]]
[[Image:Marines halo 2.jpg|right|thumb|A pair of Marines in ''[[Halo 2]]'' with the olive green color scheme.]]
[[Image:Halo_3_Marine.jpg|right|thumb|120px|A Marine in the Jungles of Africa in ''[[Halo 3]]''.]]
 
Marines have few bio-augmentations and usually wear passively camouflaged armored uniforms. They wear dark-colored metal-alloy armor to shield them from gunfire. Marine helmets are mounted with display holographic text-displaying eyepieces and [[Helmet Recorder|helmet recorders]]. As well as helmets, Marines on field operations in more humid locales sometimes choose to wear [[Wikipedia:Boonie hat|boonie covers]], or those in colder environments don visored and thicker helmets.
 
Marine [[Non-commissioned officer|NCOs]] are easily recognized by the hat that has the Eagle, Globe and Anchor of the Marine Corps that they wear. They often times substitute this command hat for a protective helmet. While they occasionally wear helmets in ''[[Halo 2]]'', in ''[[Halo: Combat Evolved]]'', they are portrayed as always wearing the hat. Sergeants are (usually) more tactically adept, are better shots, and are tougher to kill than normal Marines, though these differences in gameplay, if any, are largely unnoticed.
 
In ''[[Halo: Combat Evolved]]'', Marines sported gray fatigues, and over that, pieces of brown armor plating covering the head, shoulder, and shins. At times, they only wore their fatigues, even forgoing helmets or even body armor plating in hazardous combat operations. At times, their helmets were also substituted for boonie covers and sometimes bandanas. Some Marines had small backpacks built into their back chest armor plating, although these backpacks appeared to be part of a medical uniform, as the text "EMP" (Emergency Medical Pack) was written on the back.
 
The UNSC Marine armor was much different in ''[[Halo 2]]''. Marines appear to wear an armored suit underneath jungle camouflage-patterned padding, and a conspicuous green load-bearing armored vest over their chest padding for additional protection.  The standard-issue armor is more efficient than the body armor issued to the Marines of ''[[Halo: Combat Evolved]]''. The Marines appear as less of a rag-tag group in [[Halo 2]] than they were in [[Halo: Combat Evolved]]. They no longer wear boonie covers and are never in combat without their armor. In fact, in ''Halo 2'', the only times Marines are seen without any armor is during the awards ceremony aboard ''[[Cairo Station]]'' during a noncombat situation. In that case, they were wearing their dress whites.
 
In ''[[Halo 3]]'', the Marines sport armor that is an evolution from that of ''Halo 2'', with heavier and well-articulated woodland-colored full body armor (chest plate, back plate, shoulder plates, elbow pads, and knee pads) over camouflaged fatigues, allowing them to passively camouflage well in jungle terrain. Marines sometimes don boom mikes or black-phased sunglasses on their helmets, and others carry backpacks.
 
[[Orbital Drop Shock Troopers]], otherwise known as "Helljumpers", are a special operations group within the UNSC Marine Corps. They wear full body armor with a dark black camouflage scheme. They sport heavy and articulated black body armor, which is also believed to be pressure armor that allows for safe transport in small ships in turbulent atmospheric entry and also fully-covering and fully-visored black helmets.
 
Marines operating in cold environments wear environmentally-tailored armor, with snow camouflage scheme heavily thickened and fully-covering body armor and visored helmets with balaclavas.
 
It should be noted that all marines have a HUD not just from their helmets, but from their standard [[neural interface]].
 
=== Armament ===
[[Image:Halo-06.jpg|thumb|right|170px|Two Marines of ''[[Halo:_Combat_Evolved|Halo: Combat Evolved]]'': one with a [[SRS99C-S2_AM_Sniper_Rifle|SRS99C-S2 AM Sniper Rifle]] and the other armed with an [[MA5B_Assault_Rifle|MA5B Assault Rifle]].]]
[[Image:ODST_02.jpg|thumb|right|170px|Several [[Orbital_Drop_Shock_Trooper|Orbital Drop Shock Trooper]] special forces operators in ''[[Halo_2|Halo 2]]'' with their black camouflage full body armor.]]
 
====Infantry Weapons====
 
The standard armament for UNSC Marines is the MA5 series of assault rifles, with most Marines being issued with the MA5B variant until its replacement in late 2552 by the MA5C variant. Suppressive fire was provided by the [[M247 GP Machine Gun|M247 GPMG]] during the First Battle of Earth, presumably replaced by the [[AIE-486H Heavy Machinegun]] by the time of the Second Battle of Earth. Special Forces and vehicle crews are issued to [[M7 Submachine Gun|M7]] and [[M7S Submachine Gun]] variants, with personal sidearms filled by the [[M6 Series]].
 
Designated Marksmen are issued with the [[BR55]] Battle Rifle and its successor, the [[BR55HB SR Battle Rifle|BR55HB SR]]. Snipers operate the [[Sniper Rifle System 99C-S2 Anti-Matériel|SRS 99C-S2 AM]] and [[Sniper Rifle System 99D-S2 Anti-Matériel|SRS 99D-S2 AM]] sniper rifle variants for anti-materiel and anti-personnel operations, with the [[M99 Special Application Scoped Rifle]] used as a dedicated anti-materiel weapon.
 
Anti-armor fire is provided by the [[M19 SSM Rocket Launcher|M19]] and [[M41 SSR MAV/AW|M41]] rocket or missile launchers and the [[W/AV M6 G/GNR|W/AV M6 G/GNR Spartan Laser]] directed-energy-weapon. Anti-air fire is provided by the [[M19-B SAM Missile Launcher]], capable of destroying Banshee's and damaging Seraph fighters.
 
====Ground Vehicles====
 
The UNSC Marines standard vehicle is the [[M12 Warthog LRV]], used for armored patrols and personnel mobility. The [[M12G1 Warthog LAAV]] is used as an anti-armor vehicle, mounted with an [[M68 Gauss Cannon]], as well as the [[M12A1 Warthog LAAV]] mounted with a [[102mm SC-HE Rocket Turret]], firing 102mm shaped-charge high-explosive rockets. For heavy combat, the Marine Corps operates the [[M808B Scorpion MBT|M808B Scorpion Main battle Tank]], and uses the [[Wolverine]] in an anti-air role.
 
====Aircraft====
 
The UNSC Marine Corps' most common aircraft is the Pelican dropship, either the [[Dropship 77-Troop Carrier Pelican |D77-TC]] or, in late 2552, the [[D77H-TCI Pelican Dropship|D77H-TCI]] variants, used as multirole aerodynes, able to carry a mixture of [[Scorpion Rocket|Scorpion anti-tank rockets]] and [[ANVIL-II Air-to-Surface Missile|Anvil II air-to-surface missiles]], and equipped with chin mounted 7.62mm machineguns or 70mm autocannons. The Corps also operates the [[Sparrowhawk]] as an air-to-ground attack gunship, the [[Shortsword]] short-range bomber, and the [[SkyHawk]] VTOL strike fighter.
 
Marine air forces are intended usually to support ground forces, either in close-air-support or air interdiction roles, with the UNSC Navy taking on the dedicated air force role<ref>[[Letter - Re:Antilon Mine]]</ref>.
 
===Equipment===
==== ''[[Halo:_Combat_Evolved|Halo: Combat Evolved]]'' ====
* [[MA5B|MA5B ICWS Assault Rifle]]
* [[SRS99C-S2_AM_Sniper_Rifle|SRS99C-S2 AM Sniper Rifle]]
* [[M90_Assault_Shotgun|M90 Assault Shotgun]]
* [[M6D_Pistol|M6D Pistol]]
* [[M9_HE-DP_Grenade|M9 HE-DP Grenade]]
* [[M19_SSM_Rocket_Launcher|M19 SSM Rocket Launcher]]
 
====''[[Halo 2]]''====
*[[M6C Magnum Sidearm]]
*[[BR55 Battle Rifle]]
*[[SMG|M7/Caseless Sub Machine Gun]]
*[[SRS99C-S2 AMB Sniper Rifle]]
*[[M41 SSR MAV/AW Rocket Launcher]]
*[[M90 Assault Shotgun]]
*[[M9 HE-DP Grenade]]
*[[M247 GP Machine Gun]]
 
====''[[Halo 3]]''====
*[[M6G Personal Defense Weapon System]]
*[[SMG|M7/Caseless Sub Machine Gun]]
*[[MA5C ICWS Assault Rifle]] (standard issue)
*[[BR55HB SR Battle Rifle]]
*[[M90A Close Assault Weapon System]]
*[[SRS99D-S2 AM Sniper Rifle]]
*[[M41 SSR MAV/AW Rocket Launcher]]
*[[Spartan Laser|W/AV M6 Grindell/Galileian Nonlinear Rifle "Spartan Laser"]]
*[[M9 HE-DP Grenade]]
 
====''[[Halo Wars]]''====
[[Image:Marines HALO wars.jpg|right|thumb|A pair of Marines in ''[[Halo Wars]]'' with cold environment operations helmets and gear.]]
*[[BR55HB SR Battle Rifle]]
*[[SRS99C-S2 AM Sniper Rifle]]
 
=== Vehicles ===
====''[[Halo: Combat Evolved]]''====
*[[Ghost (Vehicle)|Ghost]]
*[[M12 Warthog LRV]]
*[[Scorpion Tank|M808B Scorpion Main Battle Tank]]
*[[D77-TC Pelican]]
 
====''[[Halo 2]]''====
*[[Ghost (Vehicle)|Ghost]]
*[[M12 Warthog LRV]]
*[[M12G1 Warthog LAAV]]
*[[Scorpion Tank|M808B Scorpion MBT]]
*[[D77-TC Pelican]]
*[[Albatross|Albatross Heavy Dropship]]
 
==== ''[[Halo 3]]'' ====
[[Image:Troop Carrier Hog.png|right|thumb|Three Marines ride with [[SPARTAN-117]] in a damaged [[Troop Transport Warthog]].]]
*[[Mongoose|M274 ULATV Mongoose]]
*[[M12 Warthog LRV|M12 LRV Warthog]]
*[[M12G1 Warthog LAAV|M12G1 LAAV Warthog]]<ref>EGM Halo 3 Single Player clip-Fall 2006</ref>
*[[M831 TT|M831 Troop Transport]]
*[[Scorpion Tank|M808 Scorpion MBT]]
*[[Elephant]]
*[[Hornet]]
*[[D77H-TCI Pelican]]
*[[Albatross|Albatross Heavy Dropship]]<ref>[[Sandtrap]] From the Brute Chopper Quicktime video</ref>
 
====''[[Halo Wars]]''====
*[[M12 Warthog LRV|M12 LRV Warthog]]
*[[Cougar|Cougar Armored Vehicle]]
*[[Wolverine|Wolverine Missile Vehicle]]
*[[Scorpion Tank|M808 Scorpion MBT]]
*[[Rhino|Rhino (Unknown Tank Class)]]
*[[Pelican|D77H-TCI Pelican Dropship]]
*[[Albatross|Albatross Heavy Dropship]]
 
=== Miscellaneous ===
 
*[[CH252 Helmet]]
*[[M52B Body Armor]]
*[[VZG7 Armored Boots]]
*[[S90 Gas Mask]]
*[[Spoofer]]
*[[VX7 Nerve gas]]
*[[PG000E Portable Electricity Generator]]
 
== Combat ==
===''[[Halo: Combat Evolved]]''===
[[Image:Marines on the Battlefield.jpg|right|thumb|Several Marines fight with [[SPARTAN-117]] to retake the [[Control Room]] of [[Installation 04]].]]
In ''[[Halo: Combat Evolved]]'', almost all Marines carry [[MA5B Assault Rifle]]s, though occasionally they can be seen with a [[Sniper Rifle]] or the [[Shotgun]], or very rarely the Covenant [[Needler]] or [[Plasma Rifle]] when no UNSC armaments are available.
 
They are relatively accurate with these weapons, with a hit percentage of 50% of upwards, often firing in short bursts with the Assault Rifle, killing a [[Grunt]] in one or two bursts, knocking a [[Jackal]]'s shield off position with repeated bursts, or cooperatively working with other Marines to take down an [[Elite]]. Marines also often utilize [[Fragmentation Grenade]]s in combat. They don't seem to be able to use rocket launchers even though there are rocket launchers around the bodies of their dead.
 
Marines will strafe and avoid fire, but not usually seek cover. They will roll out of the way of a vehicle but they will not pick up different weapons, [[Health Pack]]s, or additional ammunition. Marines are also good pathfinders, often able to maneuver around obstacles such as boulders or fallen crates in their paths.
 
Marines are conscious of fragicide. After you have killed two humans of any type, the rest of the Marines in the campaign level will attack the player. If one kills [[Captain Keyes]], or any other members of the bridge crew, in the campaign level ''[[Pillar of Autumn (Level)|The Pillar of Autumn]]'', [[Cortana]] will lock the doors and summon a squad of invincible Marines to destroy you.
 
Marines hitch rides on player-driven [[Warthog]]s and [[Scorpion Tank]]s but are only capable of piloting [[Ghost (Vehicle)|Ghost]]s by themselves, but they are not very skilled doing so, and will often run over you if you are not careful. They will exit Scorpions and warthogs when the player leaves the driver seat. This is most likely due to the fact that the marines in the Assault on the Control Room level are scripted to exit their vehicle once the player exits it.  Normally, they will stay in a Warthog or Scorpion until they are ordered to get out. Practically, they are only seen driving by themselves in the cut scene of the [[Pillar of Autumn]].
 
Interestingly, the enemy the Marines are most vulnerable to in ''Halo: Combat Evolved'' are the [[Infection Form]]s of the [[Flood]]. Once one is attached to a Marine, it cannot be shaken off and will kill the soldier.  Marines are poor fighters against the Flood and will often take heavy if not total casualties fighting them.
 
They also go "berserk" when they have taken too much damage. When down to one last bit of health, they will scream something (such as: "I'll take you all on!") then rush in a straight line toward the nearest enemy and fire in extended bursts (5-7 round burst as compared to 2-3 round bursts). This is usually the last thing they ever do, as they are badly wounded by this time and the lack of any melee attack (or the use of full auto with an assault rifle) makes them very vulnerable in the close-range combat they so clearly want to engage the enemy in. If a "berserk" Marine survives a fight, they will calm down and simply return to normal.
 
=== ''[[Halo 2]]'' ===
[[Image:Trouble.jpg|thumb|A Marine ODST prepares to fight a [[Brute]].]]
 
In ''[[Halo 2]]'', the Marines are intelligent in different ways than in ''Halo: Combat Evolved''.  
 
They are more adept with vehicles, and are able to drive the [[Warthog]], the [[Ghost (Vehicle)|Ghost]], the [[Wraith]], the [[Spectre]], and the [[Scorpion Tank|Scorpion]], albeit a bit clumsily. They can now melee sleeping Grunts or enemies with their backs turned, a vast improvement over the ''[[Halo: Combat Evolved]]'' Marines, who had to fire their weapons in such situations and ruin operational covertness.
 
However, their firearm prowess has decreased, and most Marines are unable to achieve greater than a 25%-50% hit percentage with semiautomatic weapons such as the [[Covenant Carbine]], and are instead more effective with close-range weaponry such as the [[M7/Caseless Submachine Gun]] or with heavy weaponry such as the [[M19 Rocket Launcher]] or the [[Fuel Rod Cannon]].
 
Unlike Spartans and [[Elites]] they don't have the new ability to dual wield. However dual magnums are sometimes found next to certain marines or additional weapons ex.ODST on Delta Halo with dual pistols.
 
Although their friendly fire incidents are decreased, contrary to popular belief, Marines do use fragmentation grenades in combat, albeit quite rarely, and are unaware of splash damage from heavy weapons, sometimes firing a rocket into a nearby wall and killing themselves in the operation.
 
The Marines are far more interactive, sometimes speaking to each other while in combat and wield a greater variety of weapons. The player can also easily switch weapons with the Marines to make sure that they are well armed or that the player is.  As in ''[[Halo: Combat Evolved]]'', the Marines are aware of backstabbing, and will attempt to kill you after you kill a few of their comrades. The number of Marines that can be killed before the others turn against you oddly seems to vary depending on the weapon used and the way they are shot.
 
For example, taking out three Marines with head shots usually won't make them see you as an enemy, but meleeing three Marines usually does. However, if the player progresses through the level and meets another group of marines a distance away from where the betrayal was performed, they will be marked as allies once again. Also, if the player does not harm any marines who are shooting at him/her for a certain amount of time the Marine(s) will reluctantly return to an allied condition.
 
===''[[Halo 3]]''===
[[Image:7020739-Full.jpg|right|thumb|UNSC Marines stay low and work together on [[Crow's Nest]], concentrating their fire to defeat a swarm of Drones.]]
 
Once again they can utilize the Grunts' weakness for naps by using stealth and meleeing them. They seek cover much more often and even put their back up to the wall. They throw grenades much more often, and with great accuracy, especially in higher difficulty levels. They will sometimes also display group tactics never seen in previous games, like huddling into a tight group and combining assault rifle fire while combating Drones. Even though the Marines are smarter in Halo 3 they occasionaly will make mistakes, such as running off a cliff while driving a vehicle, more or less like any new player would.
 
The player can still exchange weapons with them, though they won't accept Brute Shots, Gravity Hammers, Energy Swords, or Sentinel beams.
 
After killing two of them, any that are in the area will come to take you out. After a while (even if you are constantly killing them) they will see you as a friend again. Interestingly, their accuracy becomes 100% if betrayed, and if there are two or more remaining Marines they can end the Chief's life in a matter of seconds.
 
Their audio clips have also been vastly expanded, and profanity is used to indicate wounded status if the IWHBYD skull is activated.


===''Halo 2''===
Marines get noticeably more depressed and irritable after encounters with the [[Flood]].
<gallery>
File:H2_Marine_Concept_1.png|Early concept art of the Marines for ''[[Halo 2]]''.
File:H2_Marine_Concept_2.png|Early concept art of the Marines for ''Halo 2''.
File:H2 UNSC Early Render.jpg|Early render of Marines in ''Halo 2''.
File:H2 MarinesScorpion.jpg|Various appearances of ''Halo 2'' Marines.
File:H2-Marine.png|A cutout of a ''Halo 2'' Marine.
File:Tactical.png|Marines during the [[Battle of Mombasa|early stages]] of the [[Battle of Earth]] in ''Halo 2''.
</gallery>


===''Halo 3''===
Marines are seen in larger groups in Halo 3. In previous games they were usually seen in groups of 4-6, or one squad. Now several squads can be seen at a time, and all are able to assist you.
<gallery>
<br clear="all">
File:UNSC Marine Corps.PNG|The marines.
File:H3 Marine Concept 1.png|Concept art of the Marines for ''[[Halo 3]]''.
File:H3 Marine Concept 2.jpg|Concept art of a UNSC Marine for ''Halo 3''.
File:H3 Marine Concept 3.jpg|Concept art of a UNSC Marine for ''Halo 3''.
File:H3 Marine Concept 4.jpg|Concept art of a UNSC Marine for ''Halo 3''.
File:UNSC Marines in Halo 3.jpg|Marines operating in the jungle near Voi in ''Halo 3''.
File:H3 Marine Squad.png|A squad of Marines on the Ark in ''Halo 3''.
</gallery>


===''Halo Wars''===
==Rank structure==
<gallery>
{{Marine Ranks}}
File:HW Concept Marines.jpg|Concept art of UNSC Marines in combat with Covenant forces on Harvest in ''Halo Wars''.
File:HW Concept ScarabBattle.jpg|Concept art of UNSC Marines encountering a {{Pattern|Protos|Scarab}} in ''Halo Wars''.
File:HWunit Marines.png|UNSC Marines in ''Halo Wars''.
File:Unsc icon marines sm.jpg|UNSC Marines engaging Covenant troops in ''Halo Wars''.
File:HW-UNSCarmyvsbase.png|Vehicles of the UNSC Marine Corps attack a Firebase.
File:NewMarines.jpg|Both the Arctic and standard variations of the [[UNSC Marine Corps Battle Dress Uniform|Marine battledress]] seen in ''Halo Wars''.
</gallery>


===''Halo: Reach''===
== List of Marines ==
<gallery>
{{Main|:Category: UNSC Marine Corps Personnel}}
File:HR UNSCLineup Concept 1.jpg|Concept art for UNSC Army, Marine and ODST personnel in ''Halo: Reach''.
File:HaloReach - PoAMarines.jpg|UNSC Marines in ''Halo: Reach''.
File:HR_UNSCMarine_Deployment.jpg|UNSC Marines being deployed during the Fall of Reach.
</gallery>


===''Halo: Combat Evolved Anniversary''===
== Marine Units ==
<gallery>
{{main|List of UNSC Military Units}}
File:HCEA Johnson&Marines.jpg|UNSC Marines in the ''[[UNSC Pillar of Autumn|Pillar of Autumn]]'' in ''[[Halo: Combat Evolved Anniversary]]''.
File:HCEA_PillarOfAutumn_Marines.png|UNSC Marines defending the ''Pillar of Autumn''.
File:HCEA FireTeamCharlieVsCovies.png|UNSC Marines battling Covenant forces on the surface of [[Installation 04]].
File:HTMCC-HCEA Terminal 3.jpg|UNSC Marines on the [[bridge]] of the {{Pattern|Ket|battlecruiser}} ''[[Truth and Reconciliation]]''.
File:HCEA WallerBeachAssault.png|UNSC Marines attacking Covenant forces during the [[Battle of the Silent Cartographer]].
File:HCEA ZuluVsCovies.png|UNSC Marines battling Covenant near Installation 04's [[Control Room (Installation 04)|control room]].
</gallery>


===''Halo 4''===
==List of Marine Quotes==
<gallery>
{{main|UNSC Marine Corps/Quotes}}
File:H4 marine helmet.jpg|Concept of Halo 4 Marines before taking a different direction.
File:H4heads4.jpg|Models of UNSC Marines in ''[[Halo 4]]''.
File:H4-UNSCMarine-ScanRender.png|Portrait of a standard UNSC Marine in the postwar BDU.
File:H4-UNSCMarineVariants.jpg|Postwar BDU variants of other UNSC Marine classes.
File:H4 SpOps LandGrab ThirdPerson 02.jpg|A UNSC Marine holding a rocket launcher in ''Halo 4''.
File:H4 SO MagmaBaseGenerator 2.png|A fireteam of UNSC Marines protecting [[Magma Base]].
File:UNSC Marine - Spartan Ops.png|Profile of a UNSC Marine in ''Halo 4''.
File:UNSC Marine - Halo 4 - Cinematic.png|A close-up of a UNSC Marine in [[New Phoenix]] in ''Halo 4''.
</gallery>


===''Halo 2: Anniversary''===
== Trivia ==
<gallery>
File:H2AMarines.jpg|Marines aboard a D77-TC Pelican in ''[[Halo 2: Anniversary]]''.
File:H2ACampaign CairoMarines.png|A Marine squad aboard ''Cairo Station'' in ''[[Halo 2: Anniversary]]''.
File:H2ACampaign CairoMarineGunner.png|A Marine gunner engages the Covenant aboard ''Cairo Station'' in ''[[Halo 2: Anniversary]]''.
File:UNSC marine BDU (Halo 2 A) 4.png|Marines on Installation 05 in ''Halo 2: Anniversary''.
File:UNSC marine American2.png|A Marine armed with an M7 SMG in ''Halo 2: Anniversary''.
File:H2A-Marines.png|Marines after being rescued by John-117 aboard ''[[High Charity]]'' in ''Halo 2: Anniversary''.
File:H2A-Marinewithplasmarifle.png|A Marine aboard ''High Charity'' in ''Halo 2: Anniversary''.
File:H2A TerminalMarine Concept.jpg|A Marine in the [[Terminal (Halo 2: Anniversary)|Terminals]].
</gallery>


===''Halo 5: Guardians''===
*The equipment and armor used by UNSC Marines resembles the modern-day US Army's [[http://www.en.wikipedia.org/wiki/future_force_warrior Future Force Warrior] Program, and conceptually may have been inspired by it.
<gallery>
*Bungie went to great lengths to ensure that the Marines reflected the diversity of Earth; some Marines look and sound American, while others appear [[wikipedia:Asian|Asian]], [[wikipedia:African|African]], [[wikipedia:Australian|Australian]], [[wikipedia:Hispanic|Hispanic]] and [[wikipedia:Italian|Italian]]. Many were also modelled on members of [[Bungie]]'s own staff members to provide further diversity.
File:H5G-MarinesvsPhaeton.png|A group of [[War Games]] simulated Marines preparing to engage a [[Phaeton]].
*In the ''[[Halo: Combat Evolved]]'' level [[Truth and Reconciliation (Level)|"Truth and Reconciliation"]], [[Jacob Keyes|Captain Keyes]] tells a Marine to "Stow your belly aching...! Remember you're a leatherneck!" [[Wikipedia:Leatherneck|Leatherneck]] was a nickname earned by [[wikipedia:US Marines|U.S. Marines]] in the 19th century.
File:H5G-RedMarine.png|Red Team Marine.
*In the Halo series, Marines will turn on the player if he/she begins killing allied units.
File:H5G-BlueMarine.png|Blue Team Marine.
*In 2007, Bungie hired an actual Marine, Christian Allen, who served with the US Marines from 1995 to 1999, as a Design Lead.
File:Marine H5.png|A marine in the ''[[Halo 5: Guardians]]'' campaign.
*In Halo: CE, shooting a dead Marine's armor with a ballistic firearm would eventually send a ricochet at your shields. Meleeing them would result in a loud CLACK! However, in Halo 2 and 3, the bullets do not ricochet, but penetrate the dead bodies and result in a large amount of blood.  
</gallery>
*In Halo: CE, Marines cannot see invisible Elites, even if they have bright, glowing energy swords.
*In Halo 3, Marines generally tend to care greatly about the welfare of the Master Chief, and become scared and upset if you die. However, when playing Co-op with the Arbiter, if the Arbiter dies, the Marines don't seem to care at all and act as if it's unfortunate, but still unimportant.
*UNSC Marines tend to perform as well when seriously injured, as they do in full-health condition; an unrealistic feature of combat. But this is to be expected, as very few games properly display combat weariness for obvious gameplay-related reasons.
*In Halo 3, you can unload a full magazine onto the chest of a marine and they wont even flinch. Their armor really does protect them this time, but this is only in the center of the chest. You'll know it when you see it and the same goes for pilot helmets. Unload your entire gun on it and they wont feel a thing. Shooting the visor is a different story, shooting the marines in the helmet for halo 2 and 3 bare the same results: it will come off. If done with a battle rifle though with its 3 shot burst, the first shot will take it off and the other 2 shots will kill him. But there is a way to take it off with the BR without killing them.
*In Halo 3, if you throw a plasma grenade at a Marine, it will stick to them. They will usually shout "Get it off me!" and dive into the other Marines.
*It appears that the UNSC Marine Corps uses the USMC (United States Marine Corps) ranking system back in the 21st century.
*In Halo 1, the faces of Marines are generated by building various portrait images into a form that can be "wrapped" around a 3D model.
*Nearly all of the Marines wore the head of a Halo development team member.


===''Halo Wars 2''===
== Image gallery ==
<gallery>
File:HW2B Marines.png|Marines in the ''[[Halo Wars 2 Open Beta]]''.
File:HW2-concept-Marines.jpg|''Halo Wars 2 Open Beta'' concept art of a UNSC Marine.
File:HW2 Blitz Marines.png|Marines in ''Halo Wars 2''.
File:HW2 Blitz Extractor Marines.jpg|Extractor Marines in ''Halo Wars 2''.
File:HW2 Blitz Armored Marines.png|Armored Marines in ''Halo Wars 2''.
File:HW2 Blitz Reactive Marines.png|Reactive Marines in ''Halo Wars 2''.
</gallery>


===''Halo Infinite''===
<gallery>
<gallery>
File:HINF-ConceptMarines.jpg|Concept art of UNSC Marines for ''[[Halo Infinite]]''.
Image:MarineArmoredUniform.jpg|Halo 1 Marine Battle Armor
File:HINF Concept CavalryHasArrived.jpg|Early ''Halo Infinite'' concept art showing Marines fighting through [[Aggressor Sentinel]]s to reach John-117.
Image:MarineFatiguesUniform.jpg|Halo 1 Marine fatigue uniform.
File:HI_E318_Marines.png|Marines in the [[Halo Infinite announcement trailer]].
File:HINF Marine Transparent.png|A marine in ''Halo Infinite''.
File:HINF Marines Render.png|A render of two Marines.
File:HINF MarineSquad.png|Marines on Installation 07 in front of a FOB.
HINF MarinesVsBanshee.png|Marines defending a FOB from a Banished Banshee.
File:HINF MarineAssault.png|A marine armed with an [[MA40 assault rifle|MA40]].
File:HINF MarineHeavyAssault.png|A marine armed with a [[BR75 battle rifle|BR75]] for heavy assault.
File:HINF MarineScout.png|A marine scout wielding a [[VK78 Commando]].
File:HINF MarineBreacher.png|A marine breacher wielding a [[CQS48 Bulldog]].
File:HINF MarineSniper.png|A marine sniper wielding a [[SRS99-S7 AM sniper rifle]].
File:HINF MarineDemolition.png|A marine armed with an [[M41 SPNKr]] for demolition.
</gallery>
</gallery>


===''Miscellaneous''===
== Sources ==
<gallery>
<references/>
File:Homecoming Marine Concept.png|Concept art of a marine in ''[[Halo Legends]]: [[Homecoming]]''.
File:MarineAvatar.png|M52B Armor being worn by an [[Xbox LIVE]] Avatar; available for purchase in the Avatar Marketplace along with miscellaneous ''Halo''-related items.
File:HRoa 1 prep.png|UNSC Marines in ''[[Halo: Rise of Atriox]]''.
File:FH4 - Marine in M12S.png|A UNSC Marine driving a [[M12S Warthog CST]] in ''[[The Halo Experience Showcase]]''.
File:Enc22 MakingCamp.jpg|Marines making camp on [[Installation 07]] in the ''[[Halo Encyclopedia (2022 edition)]]''.
</gallery>


==List of appearances==
{{UNSC Services}}
{{Col-begin}}
{{Col-3}}
*''[[Halo: The Fall of Reach]]'' {{1st}}
*''[[Halo: Combat Evolved]]''
*''[[Halo: The Flood]]
*''[[Halo: First Strike]]''
*''[[Halo 2]]''
*''[[Halo Graphic Novel]]''
*''[[Halo: Ghosts of Onyx]]''
*''[[Halo: Landfall]]''
**''[[Halo: Arms Race]]''
**''[[Halo: Combat]]''
**''[[Halo: Last One Standing]]''
*''[[Halo: Uprising]]''
*''[[Halo 3]]''
*''[[Halo: Contact Harvest]]
*''[[Halo: The Cole Protocol]]''
*''[[Halo Wars: Genesis]]''
*''[[Halo Wars]]''
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==Sources==
{{Ref/Sources|2}}


{{United Nations Space Command}}
[[Category:UNSC Military Units]]


[[Category:UNSC Armed Forces|Marine Corps]]
[[Category:Organizations]]

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