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{{Status|Canon}}
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The '''Organization of the UNSC Military''' is the way in which the [[UNSC Navy]] and [[UNSC Marine Corps]] organize their fighting forces into manageable sizes of manpower for use in combat operations. Though there have been many [[UNSC]] military units named in the books and games, the exact specifications of the UNSC armed forces organization remains unclear. For a complete list of all known UNSC Military units, see [[List of UNSC Military Units]].
The [[United Nations Space Command]] armed forces '''organize''' their fighting forces into manageable sizes of manpower for use in combat operations. For a complete list of all known [[UNSC]] military units, see [[list of UNSC military units]].


==UNSC Marine Corps==
==UNSC Unified Ground Command==
The large-unit structure of the [[UNSC Marine Corps]] appears to mirror the organizational structure of the [[United States Marine Corps]] in most distinguishable ways, however the small-unit structure is more unique and in some ways still unclear. A nearly complete chart showing the sourced known structure of the UNSC Marine Corps units can be seen below. Current [[Halo]] canon focuses heavily on small unit interactions, with units at any strength higher than a Battalion being only occasionally mentioned and never elaborated upon. This has caused a lack of information regarding the specifics of larger UNSC Marine commands. Small units structure is often referenced indirectly.  The below chart shows unit strength and specifics that can be applied to all (as of yet ) known units.
{{Main|UNSC Marine Corps}}
The large-unit structure of the UNSC Marine Corps appears to mirror the organizational structure of the [[Wikipedia:United States Marine Corps|United States Marine Corps]] in most distinguishable ways, however the small-unit structure is more unique and in some ways still unclear. A nearly complete chart showing the sourced known structure of the UNSC Marine Corps units can be seen below. As in the case of the United States Marine Corps, the UNSC Marines appear to have a very flexible organization depending on the needs of the mission. The Expeditionary force is listed as the largest deployable unit above a division, but marines also deploy in Marine Expeditionary Brigades (MEB: commanded by a brigadier general and about 16,000 marines and sailors strong) and Marine Expeditionary Units (MEU: commanded by a colonel and about 2,200 marines and sailors strong).


{| border=1 cellpadding=4 cellspacing=0 align=center style="border-collapse:collapse; border:0 none; vertical-align:top;" frame=void rules=rows
Similarly to the expeditionary force, they each contain a ground combat element, an air combat element, a logistics element, and a command element. The Marine Expeditionary Brigade's Ground Combat Element consists of an infantry regiment reinforced by an artillery battalion, a tank company, a combat engineer company, and reconnaissance company. Its Air Combat Element is a composite air group (the level below air wing) commanded by a colonel and a combat logistics regiment (the level below logistics group) commanded by a colonel. The Marine Expeditionary Unit's Ground Combat Element consists of an infantry battalion reinforced by an artillery battery (the equivalent of a company), a tank platoon, a combat engineer platoon, and a reconnaissance platoon. Its Air Combat Element consists of a composite air squadron (level below air group) commanded by a lt. col. Its Logistics Combat Element consists of a composite logistics battalion (level below logistics regiment) commanded by a lt. col.
|- valign=bottom style="border-bottom:3px double #999;"
 
! align=left | Name
To be clear, Divisions, Regiments, Battalions, and corresponding air and logistics units are not permanently assigned to marine expeditionary forces, brigades, and units, but rather formed for specific task forces for a mission. For example, say the UNSC wanted to establish a base on a moon or asteroid but a force or brigade was too large for the job. It would detach an infantry battalion, tank platoon, etc. from its mother infantry division and assign these units to the MEU HQ. After the mission was over they could possibly remain with the MEU or it could be disbanded. Another possibility would be to rotate units out of the MEU back to their parent unit after some time and replace it with a fresh unit. The flexibility and adaptability of the system clearly shown here helps to explain why it has survived for centuries.
! align=left | No. of personnel
 
! align=left | No. of subordinate units
Current [[Halo]] canon focuses heavily on small unit interactions, with units at any strength higher than a battalion being only occasionally mentioned and never elaborated upon. This has caused a lack of information regarding the specifics of larger UNSC Marine commands. Small units structure is often referenced indirectly. The below chart shows unit strength and specifics that can be applied to all (as of yet ) known units.
! align=left | Unit leader
 
! align=left | Identification Scheme
{| class="wikitable" style="width:100%; margin:2px auto; vertical-align:top;"
|- valign=top style="border-bottom:1px solid #999;"
|-valign="bottom" style="border-bottom:3px double #999;"
| [[Marine Expeditionary Force|Expeditionary Force]]<ref>[[Halo: Contact Harvest]], Page 111</ref>
!align="left"|Name  
| 50,000 min.
!align="left"|No. of personnel  
| 2+ Divisions,one aircraft wing<ref>[[Halo: Contact Harvest]], Page 111</ref>
!align="left"|No. of subordinate units  
| [[Lieutenant General]]
!align="left"|Unit leader  
!align="left"|Identification Scheme
|-valign="top" style="border-bottom:1px solid #999;"
|[[Marine Expeditionary Force|Expeditionary Force]]<ref name="ch111">'''[[Halo: Contact Harvest]]''', ''page 111''</ref>
|40,000-50,000
|1 Infantry Division, 1 Air Wing (Major Gen), 1 Logistics Group (Brigadier Gen), 1 Headquarters Element{{Ref/Reuse|ch111}}
|[[Lieutenant General]]
|Designated with a number, all Expeditionary Forces in the UNSC are on the same number system. (eg- [[9th Marine Expeditionary Force]])
|Designated with a number, all Expeditionary Forces in the UNSC are on the same number system. (eg- [[9th Marine Expeditionary Force]])
|- valign=top style="border-bottom:3px double #999;"
|-valign="top" style="border-bottom:1px solid #999;"
|[[Division]]<ref>[[Halo: Contact Harvest]], Page 112</ref>
|[[Division]]<ref name="ch112">'''Halo: Contact Harvest''', ''page 112''</ref>
| 25,000
|20,000
| 3 infantry + 1 artillery Regiments
|3 Infantry Regiments + 1 Artillery Regiment, 1 Headquarters Battalion, 1 Tank Battalion
| [[Major General]]
 
1 Reconnaissance Battalion, 1 Combat Engineer Battalion
|[[Major General]]
|Designated with a number, all Divisions in the UNSC are on the same number system. (eg- [[21st Marine Division]], [[105th ODST Division]])
|Designated with a number, all Divisions in the UNSC are on the same number system. (eg- [[21st Marine Division]], [[105th ODST Division]])
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
| [[Regiment]]<ref>[[Halo Graphic Novel]]</ref>
|[[Brigade]]
| 3,200
|5,000
| 3 Battalions
|Unknown
| [[Colonel]]
|[[Brigadier General]]/[[Colonel]]
|Designated with a number, all Brigades in the UNSC are on the same number system. (eg- [[34th Infantry Brigade]], [[8th Armored Brigade]])
|-valign="top" style="border-bottom:1px solid #999;"
|[[Regiment]]<ref>'''[[Halo Graphic Novel]]'''</ref>
|3,200
|3 Infantry Battalions, 1 Headquarters and Service Company
|[[Colonel]]
|Designated with a number, all Regiments in the UNSC are on the same number system. (eg- [[77th Marine Regiment]], [[506th Tank Regiment]])
|Designated with a number, all Regiments in the UNSC are on the same number system. (eg- [[77th Marine Regiment]], [[506th Tank Regiment]])
|- valign=top style="border-bottom:3px double #999;"
|-valign="top" style="border-bottom:1px solid #999;"
| [[Battalion]]<ref>[[The Art of Halo]]</ref>
|[[Battalion]]<ref>'''[[The Art of Halo]]''', ''page ??''</ref>
|800-1,000
|800-1,000
| 3 to 4 Companies
|3 Rifle Companies, 1 Weapons Company, 1 Headquarters and Service Company
| [[Major (UNSC)|Major]]<ref>[[Halo: The Flood]], Page 33</ref>-[[Lieutenant Colonel]]<ref>[[Halo: Contact Harvest]], page 112</ref>
|[[Major (UNSC)|Major]]<ref>'''[[Halo: The Flood]]''', ''page 33''</ref>-[[Lieutenant Colonel]]{{Ref/Reuse|ch112}}
| Receive a numbering within the Regiment, or an independent number for special forces units (eg- [[7th ODST Battalion]])
|Receive a numbering within the Regiment, or an independent number for special forces units (eg- [[7th ODST Battalion]])
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
| [[Company]]<ref>[[Halo: First Strike]]</ref>
|[[Company]]<ref>'''[[Halo: First Strike]]''', ''page ??''</ref>
| 130<ref>[[Halo: The Flood]]</ref>- 250<ref>[[Halo: Contact Harvest]]</ref>
|130<ref>'''Halo: The Flood''', ''page ??''</ref>- 250<ref name="ReferenceA">'''Halo: Contact Harvest''', ''page ??''</ref>
|3 <ref>[[Halo: Contact Harvest]]</ref>-6 Platoons<ref>[[Halo 3]]</ref>
|3 {{Ref/Reuse|ReferenceA}}-6 Platoons<ref name="Halo 3">'''Halo 3'''</ref>
|[[Captain (Marine Corps)|Captain]]<ref>[[Halo: First Strike]]</ref>-[[First Lieutenant]]  
|[[Captain (ground forces)|Captain]]<ref>'''Halo: First Strike''', ''page ??''</ref>-[[First Lieutenant]]
|Designated with a letter from the [[Phonetic Alphabet]]. (eg- [[Tango Company]], [[Alpha Company]])
|Designated with a letter from the [[Phonetic Alphabet]]. (eg- [[Tango Company]], [[Alpha Company]])
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
|[[Platoon]]<ref>[[Halo 2]], level [[Delta Halo (Level)]]</ref>
|[[Platoon]]<ref>'''[[Halo 2]]''', campaign level ''[[Delta Halo]]''</ref>
|25<ref>[[Halo]]</ref>-48<ref>[[Halo: Contact Harvest]], </ref>
|25{{citation needed}}-48{{Ref/Reuse|ReferenceA}}
|3 <ref>[[Halo: Contact Harvest]]</ref>- 4 Squads <ref>[[Halo 3]]</ref>
|3 {{Ref/Reuse|ReferenceA}}- 4 Squads {{Ref/Reuse|Halo 3}}
|[[Gunnery Sergeant (UNSC)|Gunnery Sergeant]]<ref>[[Halo 3]], level [[Sierra 117 (Level)]]</ref>, [[Second Lieutenant]]<ref>[[Halo: The Flood]], page 134</ref>, or [[First Lieutenant]]<ref>[[Halo: The Flood]], page 58</ref>
|[[Gunnery Sergeant]],<ref name="h3s117">'''Halo 3''', campaign level ''[[Sierra 117]]''</ref> [[Second Lieutenant]],<ref>'''Halo: The Flood''', ''page 134''</ref> or [[First Lieutenant]]<ref>'''Halo: The Flood''', ''page 58''</ref>
|Numbered within a Company (eg- [[First Platoon]])
|Numbered within a Company (eg- [[First Platoon]])
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
|[[Section|Combat Team]] <ref>[[Halo: Combat Evolved]], level [[The Pillar of Autumn (Level)]]</ref>
|[[Combat Team]]<ref name="cepoa">'''[[Halo: Combat Evolved]]''', campaign level ''[[The Pillar of Autumn (Halo: Combat Evolved level)|The Pillar of Autumn]]''</ref>
|10-12<ref>[[Halo: Combat Evolved]]</ref>
|10-12<ref name="Halo: Combat Evolved">'''Halo: Combat Evolved'''</ref>
|2 Squads<ref>[[Halo 3]]</ref>
|2 Squads{{Ref/Reuse|Halo 3}}
|[[Sergeant]] or [[Staff Sergeant]]
|[[Sergeant]] or [[Staff Sergeant]]
|Designated within Platoon by letter in Phonetic Alphabet
|Designated within Platoon by letter in Phonetic Alphabet
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
|[[Squad]]<ref>[[Halo 3]], level [[Sierra 117]]</ref>
|[[Squad]]{{Ref/Reuse|h3s117}}
|5<ref>[[Halo: Combat Evolved]], level [[The Silent Cartographer]], level [[Truth and Reconciliation]]</ref>-8<ref>[[Halo 3]]</ref>
|5<ref>'''Halo: Combat Evolved''', campaign level ''[[The Silent Cartographer]]''</ref><ref>'''Halo: Combat Evolved''', campaign level ''[[Truth and Reconciliation]]''</ref>-8{{Ref/Reuse|Halo 3}}
|3 Fireteams <ref>[[Halo: Combat Evolved]], [[Halo: Contact Harvest]]</ref>
|3 Fireteams{{Ref/Reuse|ReferenceA}}{{Ref/Reuse|Halo: Combat Evolved}}
|[[Corporal]]<ref>[[Halo: Combat Evolved]], level [[343 Guilty Spark (Level)|343 Guilty Spark]]</ref>-[[Staff Sergeant]]<ref>[[Halo: Contact Harvest]]</ref>
|[[Corporal]]<ref>'''Halo: Combat Evolved''', campaign level ''[[343 Guilty Spark (level)|343 Guilty Spark]]''</ref>-[[Staff Sergeant]]{{Ref/Reuse|ReferenceA}}
|Numbered (using the word, not the number) within a Platoon. (eg- [[First Squad]], [[Second Squad]])
|Numbered (using the word, not the number) within a Platoon. (eg- [[First Squad]], [[Second Squad]])
|- valign=top style="border-bottom:1px solid #999;"
|-valign="top" style="border-bottom:1px solid #999;"
|[[Fireteam]]<ref>[[Halo: Combat Evolved]], level [[The Pillar of Autumn (Level)]]</ref>
|[[Fireteam]]{{Ref/Reuse|cepoa}}
|2<ref>[[Halo: Combat Part 2]]</ref>-5<ref>[[Halo: Combat Evolved]], level [[The Pillar of Autumn (Level)]]</ref>
|2<ref>'''[[Halo: Landfall]]''', ''[[Halo: Last One Standing]]''</ref>-5{{Ref/Reuse|cepoa}}
|''N/A''
|''N/A''
|[[Corporal]]<ref>[[Halo: The Fall of Reach]], page </ref>-[[Staff Sergeant]]<ref>[[Halo: Contact Harvest]]</ref>
|[[Corporal]]<ref>'''[[Halo: The Fall of Reach]]''', ''page ??''</ref>-[[Staff Sergeant]]{{Ref/Reuse|ReferenceA}}
|Designated with a letter from the phonetic alphabet within a squad, (eg- [[Alpha Team]], [[Fireteam Charlie]])
|Designated with a letter from the phonetic alphabet within a squad, (eg- [[Alpha Team]], [[Fireteam Charlie]])
|}
|}


===Exceptions===
===Exceptions===
[[Image:IFFtags.jpg|thumb|An ambiguous set of IFF tags identifying Marines from [[3/1 Bravo]] and an ODST from [[2BN/3U]].]]
[[File:IFFtags.jpg|thumb|An ambiguous set of IFF tags identifying Marines from [[3/1 Bravo]] and an ODST from [[2BN/3U]].]]
The above system seems to fit most stated units of the UNSC armed forces, but not all unit designations are clear. Specifically, the use of unit abbreviation codes make it particularly difficult to properly identify units. An example of this is the unit [[3/1 Bravo]], seen in [[Halo: Combat Part 2]]. "3/1 Bravo" could possibly stand for "Bravo Company, 1st Battalion, 3rd Marine Regiment", however, "Fireteam Bravo, First Squad, Third Platoon" is just as reasonable a translation of the code. More complicated codes arose in [[Halo 3]], such as [[S4/BAG/2/5]] and [[E2-BAG/1/7]], which have even more variables.
The above system seems to fit most stated units of the UNSC armed forces, but not all unit designations are clear. Specifically, the use of unit abbreviation codes make it particularly difficult to properly identify units. An example of this is the unit [[3/1 Bravo]], which could possibly stand for "Bravo Company, 1st Battalion, 3rd Marine Regiment", however, "Fireteam Bravo, First Squad, Third Platoon" is just as reasonable a translation of the code. More complicated codes arose in ''[[Halo 3]]'', such as [[S4/BAG/2/5]] and [[E2-BAG/1/7]], which have even more variables.


The only time a unit abbreviation code is translated is page 111 of [[Halo: Contact Harvest]], where [[M-EDF 9/21/1]] is translated as [[9th Marine Expeditionary Force]], [[21st Marine Division]], 1st Battalion. This adds further mystery to the scheme, as it apparently skips over the Regimental command and implies that the Battalion is directly subordinate to the Division level headquarters, a fact that no other source has ever stated and does not make sense according to standard military organization.
The only time a unit abbreviation code is translated is page 111 of ''[[Halo: Contact Harvest]]'', where [[M-EDF 9/21/1]] is translated as [[9th Marine Expeditionary Force]], [[21st Marine Division]], 1st Battalion. This adds further mystery to the scheme, as it apparently skips over the Regimental command and implies that the Battalion is directly subordinate to the Division level headquarters, a fact that no other source has ever stated and does not make sense according to standard military organization.


Unit designations are also deeply convoluted, due to the great use of acronyms which are not used in modern militaries and have not yet been directly spelled out. References have been made to "BAG" units (as seen above) where no modern military designates any type of combat unit with the acronym "BAG", and the many possible meanings of the acronym make it unclear what a "BAG" unit is. Other anomalies include [[2BN/3U]], where "2BN" is short for 2nd Battalion, but what "3U" stands for is unclear, and only assumed to be "Third Unit." The mentioned [[Twenty-Second Tactical]], (having received no further designation, and could be of virtually any size) and the [[105th Drop Jet Platoon]] (going against the established scheme of not providing permanent designations for Platoons) are even further examples of the confusion caused by clashing sources of information.
Unit designations are also deeply convoluted, due to the great use of acronyms which are not used in modern militaries and have not yet been directly spelled out. References have been made to "BAG" units (as seen above) where no modern military designates any type of combat unit with the acronym "BAG", and the many possible meanings of the acronym make it unclear what a "BAG" unit is. Other anomalies include [[2BN/3U]], where "2BN" is short for 2nd Battalion, but what "3U" stands for is unclear, and only assumed to be "Third Unit." The mentioned [[22nd Tactical]], (having received no further designation, and could be of virtually any size) and the [[105th Drop Jet Platoon]] (going against the established scheme of not providing permanent designations for Platoons) are even further examples of the confusion caused by clashing sources of information.


==UNSC Navy==
==UNSC Navy==
The [[UNSC Navy]] command structure has received even less attention than the UNSC Marine Corps. Mentions have been made of [[Battle Group]]s containing less than ten vessels being used, but it is unclear if battle groups are permanent assignments for ships or not. Additionally, numbered fleets have been mentioned, but no information about them other than their number designation has been revealed, making it impossible to infer what the [[UNSC Fleet]] organization is.
{{main|UNSC Navy}}
The UNSC Navy command structure has received even less attention than the UNSC Marine Corps. [[Halo: Official Spartan Field Manual]]  provided more information, in addition [[Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo]] provided crew numbers for certain ships. There have also been visual depictions of the number of ships within fleets and the rank of fleet leaders in comics, games, and films; and written depictions in books.
 
{| class="wikitable" style="width:100%; margin:2px auto; vertical-align:top;"
|-valign="bottom" style="border-bottom:3px double #999;"
!align="left"|Name
!align="left"|No. of personnel
!align="left"|No. of subordinate units
!align="left"|Unit leader
!align="left"|Identification Scheme
|-valign="top" style="border-bottom:1px solid #999;"
|[[UNSC Naval Command|Naval Command]]<ref name="FS">'''[[Halo: First Strike]]''', ''page 100''</ref>
|Unknown large number
|[[Fleet Command]] (All sectors)
|[[Fleet Admiral]]<ref>[https://www.halowaypoint.com/en-us/universe/characters?page=4 ''Halo Waypoint'', Characters] "Fleet Admiral Terrence Hood is the UNSC Navy’s highest ranking officer and Chairman of the influential UNSC Security Council."</ref>/[[Chief of Naval Operations]]{{Ref/Reuse|FS}}
|N/A
|-valign="top" style="border-bottom:1px solid #999;"
|[[Sector]]
|Unknown large number
|Several fleets
|[[Vice Admiral]]<ref name="OSFM140">''[[Halo: Official Spartan Field Manual]]'', PART 8: UNSC ORGANISATION, NAVCOM Ranks (p. 140-141)</ref> or [[Admiral]]<ref>'''[[Halo: The Fall of Reach]]''', ''page 289''</ref>
|Designated with a number (written alphabetically) at the end. (eg- [[FLEETCOM Sector One]])
|-valign="top" style="border-bottom:1px solid #999;"
|[[Fleet]]
|~750{{Ref/Reuse|H31}}{{Ref/Reuse|Warfleet1}}-????
|3{{Ref/Reuse|H31}}-152<ref name="FOR33">''Halo: The Fall of Reach'', Chapter 33</ref> ships
|[[Commander]] {{c|rarely}},<ref name="H31">[[Halo 3]], multiplayer map [[Sandtrap]] "[[Seventh Fleet]]"</ref> [[Captain]]<ref>[[The Commissioning]], [[Captain]] [[Andrew Del Rio]]</ref> or [[Rear Admiral]]
|Designated with a number (written alphabetically) at the begining for expedition fleets, defense fleets are named with the region they are defending. (eg- [[Seventh Fleet]], [[Epsilon Eridani Fleet]])
|-valign="top" style="border-bottom:1px solid #999;"
|[[Battle Group]]
|~750{{Ref/Reuse|Warfleet1}}{{Ref/Reuse|Genesis}}{{Ref/Reuse|TFOR1}}-????
|3<ref name="Genesis">''[[Halo Wars: Genesis]]''</ref><ref name="TFOR1">'''[[Halo: Fall of Reach - Boot Camp]]'''</ref>-48<ref name="leviathan">'''[[Dr. Halsey's personal journal]]''', ''August 12, 2552''</ref> ships  
|[[Commander]],<ref name="H41">'''[[Halo 4]]''', campaign level ''[[Midnight]]''</ref>  [[Captain]]{{Ref/Reuse|Genesis}}{{Ref/Reuse|TFOR1}} or [[Rear Admiral]] {{c|primarily}}{{Ref/Reuse|OSFM140}}
|Given a number (written numerically) at the end or a name (eg- [[Battle Group 4]], [[Battle Group Leviathan]])
|-valign="top" style="border-bottom:1px solid #999;"
|[[Cruiser#UNSC|Line Warship]]{{Ref/Reuse|OSFM140}}
|2200<ref name="Warfleet">Halo: Warfleet, pg. 25</ref>
|Several ship departments
|[[Captain]]{{Ref/Reuse|OSFM140}}
|N/A
|-valign="top" style="border-bottom:1px solid #999;"
|[[Frigate#UNSC|Small Warship]]{{Ref/Reuse|OSFM140}}
|250<ref name="Warfleet1">''[[Halo: Warfleet]]'', p. 36-37</ref>
|Several ship departments
|[[Commander]]{{Ref/Reuse|OSFM140}}
|N/A
|-valign="top" style="border-bottom:1px solid #999;"
|Ship department{{Ref/Reuse|OSFM140}}
|Unknown small number
|Several work divisions
|[[Lieutenant Commander]]{{Ref/Reuse|OSFM140}}
|N/A
|-valign="top" style="border-bottom:1px solid #999;"
|Work division{{Ref/Reuse|OSFM140}}
|Unknown small number
|Several staff sections
|[[Lieutenant]]{{Ref/Reuse|OSFM140}}
|N/A
|-valign="top" style="border-bottom:1px solid #999;"
|Staff section{{Ref/Reuse|OSFM140}}
|Unknown small number
|Several [[crewman|crewmen]]
|[[Lieutenant Junior Grade]]{{Ref/Reuse|OSFM140}}
|N/A
|}
 
==Sources==
{{Ref/Sources}}


==References==
[[Category:UNSC organizational military units]]
<small><references/></small>

Latest revision as of 18:49, August 28, 2023

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The United Nations Space Command armed forces organize their fighting forces into manageable sizes of manpower for use in combat operations. For a complete list of all known UNSC military units, see list of UNSC military units.

UNSC Unified Ground Command[edit]

Main article: UNSC Marine Corps

The large-unit structure of the UNSC Marine Corps appears to mirror the organizational structure of the United States Marine Corps in most distinguishable ways, however the small-unit structure is more unique and in some ways still unclear. A nearly complete chart showing the sourced known structure of the UNSC Marine Corps units can be seen below. As in the case of the United States Marine Corps, the UNSC Marines appear to have a very flexible organization depending on the needs of the mission. The Expeditionary force is listed as the largest deployable unit above a division, but marines also deploy in Marine Expeditionary Brigades (MEB: commanded by a brigadier general and about 16,000 marines and sailors strong) and Marine Expeditionary Units (MEU: commanded by a colonel and about 2,200 marines and sailors strong).

Similarly to the expeditionary force, they each contain a ground combat element, an air combat element, a logistics element, and a command element. The Marine Expeditionary Brigade's Ground Combat Element consists of an infantry regiment reinforced by an artillery battalion, a tank company, a combat engineer company, and reconnaissance company. Its Air Combat Element is a composite air group (the level below air wing) commanded by a colonel and a combat logistics regiment (the level below logistics group) commanded by a colonel. The Marine Expeditionary Unit's Ground Combat Element consists of an infantry battalion reinforced by an artillery battery (the equivalent of a company), a tank platoon, a combat engineer platoon, and a reconnaissance platoon. Its Air Combat Element consists of a composite air squadron (level below air group) commanded by a lt. col. Its Logistics Combat Element consists of a composite logistics battalion (level below logistics regiment) commanded by a lt. col.

To be clear, Divisions, Regiments, Battalions, and corresponding air and logistics units are not permanently assigned to marine expeditionary forces, brigades, and units, but rather formed for specific task forces for a mission. For example, say the UNSC wanted to establish a base on a moon or asteroid but a force or brigade was too large for the job. It would detach an infantry battalion, tank platoon, etc. from its mother infantry division and assign these units to the MEU HQ. After the mission was over they could possibly remain with the MEU or it could be disbanded. Another possibility would be to rotate units out of the MEU back to their parent unit after some time and replace it with a fresh unit. The flexibility and adaptability of the system clearly shown here helps to explain why it has survived for centuries.

Current Halo canon focuses heavily on small unit interactions, with units at any strength higher than a battalion being only occasionally mentioned and never elaborated upon. This has caused a lack of information regarding the specifics of larger UNSC Marine commands. Small units structure is often referenced indirectly. The below chart shows unit strength and specifics that can be applied to all (as of yet ) known units.

Name No. of personnel No. of subordinate units Unit leader Identification Scheme
Expeditionary Force[1] 40,000-50,000 1 Infantry Division, 1 Air Wing (Major Gen), 1 Logistics Group (Brigadier Gen), 1 Headquarters Element[1] Lieutenant General Designated with a number, all Expeditionary Forces in the UNSC are on the same number system. (eg- 9th Marine Expeditionary Force)
Division[2] 20,000 3 Infantry Regiments + 1 Artillery Regiment, 1 Headquarters Battalion, 1 Tank Battalion

1 Reconnaissance Battalion, 1 Combat Engineer Battalion

Major General Designated with a number, all Divisions in the UNSC are on the same number system. (eg- 21st Marine Division, 105th ODST Division)
Brigade 5,000 Unknown Brigadier General/Colonel Designated with a number, all Brigades in the UNSC are on the same number system. (eg- 34th Infantry Brigade, 8th Armored Brigade)
Regiment[3] 3,200 3 Infantry Battalions, 1 Headquarters and Service Company Colonel Designated with a number, all Regiments in the UNSC are on the same number system. (eg- 77th Marine Regiment, 506th Tank Regiment)
Battalion[4] 800-1,000 3 Rifle Companies, 1 Weapons Company, 1 Headquarters and Service Company Major[5]-Lieutenant Colonel[2] Receive a numbering within the Regiment, or an independent number for special forces units (eg- 7th ODST Battalion)
Company[6] 130[7]- 250[8] 3 [8]-6 Platoons[9] Captain[10]-First Lieutenant Designated with a letter from the Phonetic Alphabet. (eg- Tango Company, Alpha Company)
Platoon[11] 25[citation needed]-48[8] 3 [8]- 4 Squads [9] Gunnery Sergeant,[12] Second Lieutenant,[13] or First Lieutenant[14] Numbered within a Company (eg- First Platoon)
Combat Team[15] 10-12[16] 2 Squads[9] Sergeant or Staff Sergeant Designated within Platoon by letter in Phonetic Alphabet
Squad[12] 5[17][18]-8[9] 3 Fireteams[8][16] Corporal[19]-Staff Sergeant[8] Numbered (using the word, not the number) within a Platoon. (eg- First Squad, Second Squad)
Fireteam[15] 2[20]-5[15] N/A Corporal[21]-Staff Sergeant[8] Designated with a letter from the phonetic alphabet within a squad, (eg- Alpha Team, Fireteam Charlie)

Exceptions[edit]

An ambiguous set of IFF tags identifying Marines from 3/1 Bravo and an ODST from 2BN/3U.

The above system seems to fit most stated units of the UNSC armed forces, but not all unit designations are clear. Specifically, the use of unit abbreviation codes make it particularly difficult to properly identify units. An example of this is the unit 3/1 Bravo, which could possibly stand for "Bravo Company, 1st Battalion, 3rd Marine Regiment", however, "Fireteam Bravo, First Squad, Third Platoon" is just as reasonable a translation of the code. More complicated codes arose in Halo 3, such as S4/BAG/2/5 and E2-BAG/1/7, which have even more variables.

The only time a unit abbreviation code is translated is page 111 of Halo: Contact Harvest, where M-EDF 9/21/1 is translated as 9th Marine Expeditionary Force, 21st Marine Division, 1st Battalion. This adds further mystery to the scheme, as it apparently skips over the Regimental command and implies that the Battalion is directly subordinate to the Division level headquarters, a fact that no other source has ever stated and does not make sense according to standard military organization.

Unit designations are also deeply convoluted, due to the great use of acronyms which are not used in modern militaries and have not yet been directly spelled out. References have been made to "BAG" units (as seen above) where no modern military designates any type of combat unit with the acronym "BAG", and the many possible meanings of the acronym make it unclear what a "BAG" unit is. Other anomalies include 2BN/3U, where "2BN" is short for 2nd Battalion, but what "3U" stands for is unclear, and only assumed to be "Third Unit." The mentioned 22nd Tactical, (having received no further designation, and could be of virtually any size) and the 105th Drop Jet Platoon (going against the established scheme of not providing permanent designations for Platoons) are even further examples of the confusion caused by clashing sources of information.

UNSC Navy[edit]

Main article: UNSC Navy

The UNSC Navy command structure has received even less attention than the UNSC Marine Corps. Halo: Official Spartan Field Manual provided more information, in addition Halo: Warfleet – An Illustrated Guide to the Spacecraft of Halo provided crew numbers for certain ships. There have also been visual depictions of the number of ships within fleets and the rank of fleet leaders in comics, games, and films; and written depictions in books.

Name No. of personnel No. of subordinate units Unit leader Identification Scheme
Naval Command[22] Unknown large number Fleet Command (All sectors) Fleet Admiral[23]/Chief of Naval Operations[22] N/A
Sector Unknown large number Several fleets Vice Admiral[24] or Admiral[25] Designated with a number (written alphabetically) at the end. (eg- FLEETCOM Sector One)
Fleet ~750[26][27]-???? 3[26]-152[28] ships Commander (rarely),[26] Captain[29] or Rear Admiral Designated with a number (written alphabetically) at the begining for expedition fleets, defense fleets are named with the region they are defending. (eg- Seventh Fleet, Epsilon Eridani Fleet)
Battle Group ~750[27][30][31]-???? 3[30][31]-48[32] ships Commander,[33] Captain[30][31] or Rear Admiral (primarily)[24] Given a number (written numerically) at the end or a name (eg- Battle Group 4, Battle Group Leviathan)
Line Warship[24] 2200[34] Several ship departments Captain[24] N/A
Small Warship[24] 250[27] Several ship departments Commander[24] N/A
Ship department[24] Unknown small number Several work divisions Lieutenant Commander[24] N/A
Work division[24] Unknown small number Several staff sections Lieutenant[24] N/A
Staff section[24] Unknown small number Several crewmen Lieutenant Junior Grade[24] N/A

Sources[edit]

  1. ^ a b Halo: Contact Harvest, page 111
  2. ^ a b Halo: Contact Harvest, page 112
  3. ^ Halo Graphic Novel
  4. ^ The Art of Halo, page ??
  5. ^ Halo: The Flood, page 33
  6. ^ Halo: First Strike, page ??
  7. ^ Halo: The Flood, page ??
  8. ^ a b c d e f g Halo: Contact Harvest, page ??
  9. ^ a b c d Halo 3
  10. ^ Halo: First Strike, page ??
  11. ^ Halo 2, campaign level Delta Halo
  12. ^ a b Halo 3, campaign level Sierra 117
  13. ^ Halo: The Flood, page 134
  14. ^ Halo: The Flood, page 58
  15. ^ a b c Halo: Combat Evolved, campaign level The Pillar of Autumn
  16. ^ a b Halo: Combat Evolved
  17. ^ Halo: Combat Evolved, campaign level The Silent Cartographer
  18. ^ Halo: Combat Evolved, campaign level Truth and Reconciliation
  19. ^ Halo: Combat Evolved, campaign level 343 Guilty Spark
  20. ^ Halo: Landfall, Halo: Last One Standing
  21. ^ Halo: The Fall of Reach, page ??
  22. ^ a b Halo: First Strike, page 100
  23. ^ Halo Waypoint, Characters "Fleet Admiral Terrence Hood is the UNSC Navy’s highest ranking officer and Chairman of the influential UNSC Security Council."
  24. ^ a b c d e f g h i j k l Halo: Official Spartan Field Manual, PART 8: UNSC ORGANISATION, NAVCOM Ranks (p. 140-141)
  25. ^ Halo: The Fall of Reach, page 289
  26. ^ a b c Halo 3, multiplayer map Sandtrap "Seventh Fleet"
  27. ^ a b c Halo: Warfleet, p. 36-37
  28. ^ Halo: The Fall of Reach, Chapter 33
  29. ^ The Commissioning, Captain Andrew Del Rio
  30. ^ a b c Halo Wars: Genesis
  31. ^ a b c Halo: Fall of Reach - Boot Camp
  32. ^ Dr. Halsey's personal journal, August 12, 2552
  33. ^ Halo 4, campaign level Midnight
  34. ^ Halo: Warfleet, pg. 25
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