Organization of the United States Marine Corps
Encyclopedia
The United States Marine Corps
United States Marine Corps
The United States Marine Corps is a branch of the United States Armed Forces responsible for providing power projection from the sea, using the mobility of the United States Navy to deliver combined-arms task forces rapidly. It is one of seven uniformed services of the United States...

 is organized within the Department of the Navy
United States Department of the Navy
The Department of the Navy of the United States of America was established by an Act of Congress on 30 April 1798, to provide a government organizational structure to the United States Navy and, from 1834 onwards, for the United States Marine Corps, and when directed by the President, of the...

, which is led by the Secretary of the Navy
United States Secretary of the Navy
The Secretary of the Navy of the United States of America is the head of the Department of the Navy, a component organization of the Department of Defense...

 (SECNAV). The most senior Marine officer is the Commandant of the Marine Corps
Commandant of the Marine Corps
The Commandant of the Marine Corps is normally the highest ranking officer in the United States Marine Corps and is a member of the Joint Chiefs of Staff...

, responsible for organizing, recruiting, training, and equipping the Marine Corps so that it is ready for operation under the command of the Unified Combatant Command
Unified Combatant Command
A Unified Combatant Command is a United States Department of Defense command that is composed of forces from at least two Military Departments and has a broad and continuing mission. These commands are established to provide effective command and control of U.S. military forces, regardless of...

ers. The Marine Corps is organized into four principal subdivisions: Headquarters Marine Corps
Headquarters Marine Corps
Headquarters Marine Corps is a headquarters staff within the Department of the Navy which includes the offices of the Commandant of the Marine Corps, the Assistant Commandant of the Marine Corps and various staff functions...

, the Operating Forces, the Supporting Establishment, and the Marine Forces Reserve
United States Marine Corps Reserve
The Marine Forces Reserve is the reserve force of the United States Marine Corps. It is the largest command in the U.S...

.

The Operating Forces are further subdivided into three categories: Marine forces assigned to Unified Combatant Command
Unified Combatant Command
A Unified Combatant Command is a United States Department of Defense command that is composed of forces from at least two Military Departments and has a broad and continuing mission. These commands are established to provide effective command and control of U.S. military forces, regardless of...

s, Marine Corps Security Forces guarding naval installations, and Marine Security Guard detachments at American embassies. Under the "Forces for Unified Commands" memo, Marine forces are assigned to each of the regional unified combatant commands at the discretion of the Secretary of Defense and with the approval of the President. Since 1991, the Marine Corps has maintained component headquarters at each of the regional unified combatant commands.

Marine Corps Forces are further divided into Marine Forces Command
United States Marine Corps Forces Command
Commander, U.S. Marine Corps Forces Command , headquartered at Naval Support Activity Norfolk, Virginia, commands Service retained-operating forces; executes force sourcing and synchronization to affect force generation actions in the provisioning of joint capable Marine Corps forces, and directs...

 (consisting of II Marine Expeditionary Force) and Marine Forces Pacific (I Marine Expeditionary Force and III Marine Expeditionary Force
III Marine Expeditionary Force
The III Marine Expeditionary Force is a Marine Air-Ground Task Force of the United States Marine Corps that is forward-deployed and able to deploy rapidly and conduct operations across the spectrum from humanitarian assistance and disaster relief to amphibious assault and high intensity combat. III...

). The commander of the former also serves as Commanding General for Fleet Marine Force, Atlantic
Fleet Marine Force, Atlantic
The United States Fleet Marine Force, Atlantic is the maritime landing force that are spread across the Atlantic Ocean and reports to the United States Atlantic Command...

, Marine Corps Forces, Europe, Marine Corps Forces, South, Marine Corps Forces, Strategic, and Marine Corps Installations East
Marine Corps Installations East
Marine Corps Installations East is the regional authority tasked with providing support and oversight of seven United States Marine Corps installations on the East Coast. The purpose behind MCIEAST is to ensure warfighters receive a level of support that exceeds expectations while at the same...

; while the latter serves as commander of Fleet Marine Force, Pacific
Fleet Marine Force, Pacific
The United States Fleet Marine Force, Pacific is the largest maritime landing force in the world. Its units are spread across the Pacific Ocean and reports to the United States Pacific Command. It is headquartered at MCB Camp H. M...

, Marine Forces Central Command
United States Marine Forces Central Command
Marine Forces Central Command commands all United States Marine Corps forces assigned to United States Central Command. They do not have any actual combat units but do command units that are attached from other Marine Commands...

, and Marine Corps Installations West
Marine Corps Installations West
Marine Corps Installations West is the regional authority tasked with providing support and oversight of seven United States Marine Corps installations on the West Coast. The purpose behind MCI WEST is to ensure warfighters receive a level of support that exceeds expectations while at the same...

.

The Supporting Establishment includes Combat Development Command
Marine Corps Combat Development Command
Marine Corps Combat Development Command, located in at Marine Corps Base Quantico, Virginia, has the mission of developing Marine Corps warfighting abilities to enable the Corps to field combat-ready forces...

, recruit Depots
United States Marine Corps Recruit Training
United States Marine Corps Recruit Training, commonly known as "boot camp", is a program of initial training that each recruit must successfully complete in order to join the United States Marine Corps...

, Marine Corps Logistics Command
Marine Corps Logistics Command
Marine Corps Logistics Command is a major command of the United States Marine Corps that is the preferred provider of supply chain management, collaborative maintenance management and strategic prepositioning to the Operating Forces and other services and agencies.-Mission:To provide worldwide,...

, Marine bases air stations, Marine Corps Recruiting Command
Marine Corps Recruiting Command
The Marine Corps Recruiting Command is a command of the United States Marine Corps responsible for military recruitment of civilians into the Corps...

, and the United States Marine Band
United States Marine Band
The United States Marine Band is the premier band of the United States Marine Corps. Established by act of Congress on July 11, 1798, it is the oldest of the United States military bands and the oldest professional musical organization in the United States...

.

Relationship with other Services

Since the Marine Corps' combat capabilities overlap those of the U.S. Army, the latter has historically viewed the Corps as encroaching on the Army's capabilities and competing for money, missions, and fame. The attitude dates back to the founding of the Marine Corps, when General George Washington
George Washington
George Washington was the dominant military and political leader of the new United States of America from 1775 to 1799. He led the American victory over Great Britain in the American Revolutionary War as commander-in-chief of the Continental Army from 1775 to 1783, and presided over the writing of...

 refused to allow the initial Marine battalions to be drawn from among his army. Most significantly, in the aftermath of World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, Army efforts to restructure the American defense establishment involved the dissolution of the Marine Corps and the folding of its capabilities into the other services. Leading this movement were such prominent Army officers as General Dwight Eisenhower and Army Chief of Staff
Chief of Staff of the United States Army
The Chief of Staff of the Army is a statutory office held by a four-star general in the United States Army, and is the most senior uniformed officer assigned to serve in the Department of the Army, and as such is the principal military advisor and a deputy to the Secretary of the Army; and is in...

 George C. Marshall.

The Marine Corps is a partner service with the U.S. Navy under the Department of the Navy. Both the Chief of Naval Operations
Chief of Naval Operations
The Chief of Naval Operations is a statutory office held by a four-star admiral in the United States Navy, and is the most senior uniformed officer assigned to serve in the Department of the Navy. The office is a military adviser and deputy to the Secretary of the Navy...

 (CNO) and Commandant of the Marine Corps
Commandant of the Marine Corps
The Commandant of the Marine Corps is normally the highest ranking officer in the United States Marine Corps and is a member of the Joint Chiefs of Staff...

 (CMC), heads of their respective services, report directly to the Secretary of the Navy (SECNAV), a civilian who heads the Department of the Navy (DON). As a result, the Navy and Marine Corps have a close relationship, more so than with other branches of the United States Military. Recent whitepapers and promotional literature have commonly used the phrase "Navy-Marine Corps Team"
. This relationship stems from the Navy providing transport, logistical, medical, and religious service as well as combat support to put Marine units into the fight where they are needed. Conversely, Marines are responsible for conducting land operations to support Naval campaigns, including the seizure of naval and air bases. All Marine Aviation programs except for specific Command and Control and Air Defense programs are funded by the Navy and Marine Officers are assigned to the Office of Chief of Naval Operations (OPNAV) Air Warfare Branch (N88) to represent their interests and serve as action officers. By Congressional mandate, the OPNAV Expeditionary Warfare Branch billet (N85) is filled by a Marine general.

The Marine Corps cooperates with the Navy on many institutional support services. The Corps receives a significant portion of its officers from the United States Naval Academy
United States Naval Academy
The United States Naval Academy is a four-year coeducational federal service academy located in Annapolis, Maryland, United States...

 and Navy Reserve Officer Training Corps (NROTC)
Naval Reserve Officer Training Corps
The Naval Reserve Officers Training Corps program is a college-based, commissioned officer training program of the United States Navy and the United States Marine Corps.-Origins:...

, which are partially staffed by Marines. Marine Corps Drill Instructors contribute to training Naval officers in Officer Candidate School
Officer Candidate School (U.S. Navy)
The United States Navy's Officer Candidate School, currently located at Naval Station Newport, Rhode Island, provides training to become a commissioned officer. Attendance is one possible way for civilian college graduates with no military experience to earn a commission as a U.S. Navy officer...

. Marine aviators
United States Marine Corps Aviation
United States Marine Corps Aviation is the air component of the United States Marine Corps. Marine aviation has a very different mission and operation than its ground counterpart, and thus, has many of its own histories, traditions, terms, and procedures....

 are trained in the Naval Aviation training
Naval Air Station Pensacola
Naval Air Station Pensacola or NAS Pensacola , "The Cradle of Naval Aviation", is a United States Navy base located next to Warrington, Florida, a community southwest of the Pensacola city limits...

 pipeline, and utilize Naval weapons and test pilot schools. Currently, Navy aircraft carriers deploy with a Marine Hornet
F/A-18 Hornet
The McDonnell Douglas F/A-18 Hornet is a supersonic, all-weather carrier-capable multirole fighter jet, designed to dogfight and attack ground targets . Designed by McDonnell Douglas and Northrop, the F/A-18 was derived from the latter's YF-17 in the 1970s for use by the United States Navy and...

 squadron alongside Navy squadrons. The Navy's Blue Angels
Blue Angels
The United States Navy's Navy Flight Demonstration Squadron, popularly known as the Blue Angels, was formed in 1946 and is currently the oldest formal flying aerobatic team...

 flight team includes at least one Marine pilot and is supported by a Marines C-130 Hercules aircraft.

Since the Marines do not train Chaplains
United States Navy Chaplain Corps
The Chaplain Corps of the United States Navy consists of ordained clergy who are commissioned naval officers. Their principal purpose is to "promote the spiritual, religious, moral, and personal well-being of the members of the Department of the Navy," which includes the Navy and the United States...

 or medical personnel, officers and enlisted sailors from the Navy fill these roles. Some of these sailors, particularly Hospital Corpsmen, generally wear Marine uniforms emblazoned with the Marine insignia but US Navy name tags in order to be distinct to compatriots but indistinguishable to enemies. The Marines also operate a network security team in conjunction with the Navy. Marines and Sailors share the vast majority of branch-specific awards, with Marines earning the Navy Cross
Navy Cross
The Navy Cross is the highest decoration that may be bestowed by the Department of the Navy and the second highest decoration given for valor. It is normally only awarded to members of the United States Navy, United States Marine Corps and United States Coast Guard, but can be awarded to all...

, the highest honor awarded short of the Medal of Honor
Medal of Honor
The Medal of Honor is the highest military decoration awarded by the United States government. It is bestowed by the President, in the name of Congress, upon members of the United States Armed Forces who distinguish themselves through "conspicuous gallantry and intrepidity at the risk of his or her...

 (which Marines also are awarded, in the Navy version of the Medal of Honor), and other like medals; while an example of the few Marine-only awards is the Good Conduct Medal.

Marine Air-Ground Task Force

Today, the basic framework for deployable Marine units is the Marine Air-Ground Task Force
Marine Air-Ground Task Force
The Marine Air-Ground Task Force is a term used by the United States Marine Corps to describe the principal organization for all missions across the range of military operations. MAGTFs are a balanced air-ground, combined arms task organization of Marine Corps forces under a single commander that...

 (MAGTF), a flexible structure that can vary in size. A MAGTF is composed of four elements: the command element (CE), the ground combat element
Ground combat element
In the United States Marine Corps, the Ground combat element is the land force of a Marine Air-Ground Task Force . It provides power projection and force for the MAGTF.-Role within the MAGTF:...

 (GCE), the aviation combat element
Aviation combat element
In the United States Marine Corps, the aviation combat element or air combat element is the air arm of the Marine Air-Ground Task Force . It provides rotary-wing, tiltrotor, and fixed-wing aircraft, support equipment, pilots, maintenance personnel, as well as command and control assets to the...

 (ACE) and the logistics combat element
Logistics Combat Element
In the United States Marine Corps, the Logistics Combat Element , formerly combat service support element, is the portion of the Marine Air-Ground Task Force responsible with providing logistical support...

 (LCE). A MAGTF can operate independently or as part of a larger coalition. It is a temporary organization formed for a specific mission and dissolved after completion of that mission.

The MAGTF structure reflects a strong tradition in the Corps towards self-sufficiency and a commitment to combined arms
Combined arms
Combined arms is an approach to warfare which seeks to integrate different branches of a military to achieve mutually complementary effects...

, both essential assets to an expeditionary force often called upon to act independently in discrete, time-sensitive situations. The history of the Marine Corps as well has led to a wariness towards relying too much on its sister services, and towards joint operations in general.

A MAGTF varies in size from the smallest, a Marine Expeditionary Unit
Marine Expeditionary Unit
A Marine expeditionary unit , formerly called Marine amphibious unit , is the smallest Marine air-ground task force in the United States Fleet Marine Force...

 (MEU), based around a reinforced infantry battalion
Battalion
A battalion is a military unit of around 300–1,200 soldiers usually consisting of between two and seven companies and typically commanded by either a Lieutenant Colonel or a Colonel...

 and a composite squadron
Squadron (aviation)
A squadron in air force, army aviation or naval aviation is mainly a unit comprising a number of military aircraft, usually of the same type, typically with 12 to 24 aircraft, sometimes divided into three or four flights, depending on aircraft type and air force...

, up to the largest, a Marine Expeditionary Force
Marine Expeditionary Force
A Marine Expeditionary Force or MEF is the largest type of a Marine Air-Ground Task Force...

 (MEF), which ties together a Division
Division (military)
A division is a large military unit or formation usually consisting of between 10,000 and 20,000 soldiers. In most armies, a division is composed of several regiments or brigades, and in turn several divisions typically make up a corps...

, an Air Wing
Wing (air force unit)
Wing is a term used by different military aviation forces for a unit of command. The terms wing, group or Staffel are used for different-sized units from one country or service to another....

, and a Logistics Group under a MEF Headquarters Group.

The three Marine Expeditionary Forces are:
  • I Marine Expeditionary Force located at Camp Pendleton, California
    California
    California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

  • II Marine Expeditionary Force located at Camp Lejeune, North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

  • III Marine Expeditionary Force
    III Marine Expeditionary Force
    The III Marine Expeditionary Force is a Marine Air-Ground Task Force of the United States Marine Corps that is forward-deployed and able to deploy rapidly and conduct operations across the spectrum from humanitarian assistance and disaster relief to amphibious assault and high intensity combat. III...

     located at Camp Courtney
    Camp Courtney
    Camp Courtney is a United States Marine Base located in Uruma City, Okinawa Prefecture, Japan. It is part of the larger Marine Corps Base Camp Smedley D. Butler and home to the III Marine Expeditionary Force headquarters as well as the 3rd Marine Division Headquarters. It is named after Major...

    , Okinawa, Japan
    Japan
    Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...


Marine Expeditionary Unit (MEU)

Each of the seven MEUs are assigned to their respective Navy fleet as components of the Fleet Marine Force
Fleet Marine Force
The United States Fleet Marine Forces are combined general and special purpose forces within the United States Department of the Navy that are designed in engaging offensive amphibious or expeditionary warfare and defensive maritime employment...

: three to the Atlantic Fleet (based at Camp Lejeune), and four to the Pacific Fleet
United States Pacific Fleet
The United States Pacific Fleet is a Pacific Ocean theater-level component command of the United States Navy that provides naval resources under the operational control of the United States Pacific Command. Its home port is at Pearl Harbor Naval Base, Hawaii. It is commanded by Admiral Patrick M...

 (three based at Camp Pendleton and one in Okinawa). Each is commanded by a colonel
Colonel (United States)
In the United States Army, Air Force, and Marine Corps, colonel is a senior field grade military officer rank just above the rank of lieutenant colonel and just below the rank of brigadier general...

 with a combat arms background thus, infantry
Infantry
Infantrymen are soldiers who are specifically trained for the role of fighting on foot to engage the enemy face to face and have historically borne the brunt of the casualties of combat in wars. As the oldest branch of combat arms, they are the backbone of armies...

 or aviator
United States Naval Aviator
A United States Naval Aviator is a qualified pilot in the United States Navy, Marine Corps or Coast Guard.-Naming Conventions:Most Naval Aviators are Unrestricted Line Officers; however, a small number of Limited Duty Officers and Chief Warrant Officers are also trained as Naval Aviators.Until 1981...

. The MEU components consist of a command element, ground combat element, aviation combat element, and a logistics combat element each commanded by a lieutenant colonel
Lieutenant Colonel (United States)
In the United States Army, United States Air Force, and United States Marine Corps, a lieutenant colonel is a field grade military officer rank just above the rank of major and just below the rank of colonel. It is equivalent to the naval rank of commander in the other uniformed services.The pay...

. MEU rotations are staggered so that while one MEU is on deployment, another is training to deploy, and one is standing down to refit and exchange units. Each MEU is trained during its workup evolution to perform special operations tasks and is then designated as a MEU(SOC) (Special Operations Capable
Special Operations Capable
Special Operations Capable refers to special tasks that the tangible Marine Air-Ground Task Force units are capable in providing to the Fleet Marine Force , or foreign uniformed services of maritime regions worldwide...

). Each MEU can tailor its equipment to the expected tasking.

MEU Components:
  • Command Element
  • Aviation Combat Element (a composite squadron organized with a variety of platforms)
  • Ground Combat Element (a infantry battalion, known as the "Battalion Landing Team", task-organized and reinforced with other organic elements such as armor, artillery, and engineers)
  • Logistics Support Element (equipped with motor vehicles as needed)


Typically, a MEU deploys as part of a Expeditionary Strike Group
Expeditionary Strike Group
The Expeditionary Strike Group, or ESG, is a concept introduced in the U.S. military in the early 1990s, based on the Naval Expeditionary Task Force. The U.S. Navy fields 12 Expeditionary Strike Groups and 11 Carrier Strike Groups, in addition to surface action groups...

 along with a Amphibious ready group
Amphibious Ready Group
An Amphibious Readiness Group of the United States Navy consists of a Navy element—a group of warships known as an amphibious task force —and a landing force of United States Marines , in total about 5,000 people. Together, these elements and supporting units are trained, organized, and equipped...

, composed of Navy amphibious ("L-class") ships (a LHD
LHD (hull classification symbol)
Landing Helicopter Dock , is the US Navy hull classification symbol for multipurpose amphibious assault ships which are capable of operating helicopters and have a well deck...

 or LHA
LHA (hull classification symbol)
thumb|right|300px|USS Tarawa LHA, for Landing Helicopter Assault, is the US Navy hull classification symbol for the general purpose helicopter-carrying amphibious assault ships of the Tarawa and the future America classes. They are used to transport Fleet Marine Force personnel and equipment while...

 to serve as the flagship
Flagship
A flagship is a vessel used by the commanding officer of a group of naval ships, reflecting the custom of its commander, characteristically a flag officer, flying a distinguishing flag...

 of the Amphibious Squadron, LSD
Dock landing ship
A Dock landing ship or Landing ship is a form of amphibious warship designed to support amphibious operations. These amphibious assault ships transport and launch amphibious craft and vehicles with their crews and embarked personnel...

(s), and LPD
Amphibious transport dock
An amphibious transport dock, also called a landing platform/dock , is an amphibious warfare ship, a warship that embarks, transports, and lands elements of a landing force for expeditionary warfare missions. Several navies currently operate this kind of ship...

(s) that embark the MEU), escort ships (such as the , , , and an ), and the requisite landing vehicles to transport the MEU ashore, such as the LCAC, LCU
Landing Craft Utility
The Landing Craft Utility is a type of boat used by amphibious forces to transport equipment and troops to the shore. They are capable of transporting tracked or wheeled vehicles and troops from amphibious assault ships to beachheads or piers....

 surface craft, Amphibious Assault Vehicle
Amphibious Assault Vehicle
The Assault Amphibious Vehicle —official designation AAV-7A1 is a fully tracked amphibious landing vehicle manufactured by U.S. Combat Systems .The AAV-7A1 is the current amphibious troop transport of the United States Marine Corps...

/Expeditionary Fighting Vehicle
Expeditionary Fighting Vehicle
The Expeditionary Fighting Vehicle is an amphibious assault vehicle that was being developed for the U.S. Marine Corps. It is launched at sea, from an amphibious assault ship beyond the horizon, able to transport a full Marine rifle squad to shore...

 (though the MEU can utilize its helicopter lift assets embarked aboard the LHD or LHA). The theater component commander can use the ESG in its entirety or detach units as needed, though the MEU usually remains aboard the ships of the ARG to use it as their principal base of operations. This ability to remain at sea and "over the horizon" until called is a unique capability of the ARG/MEU.

Ground Combat Elements

The basic organization of Marine Corps infantry units follows the "rule of threes", which places three subordinates under a commander, not counting support elements. The organization and weapons are from the Marine Corps Table of Organization and Equipment
Table of Organization and Equipment
A table of organization and equipment is a document published by the U.S. Department of Defense which prescribes the organization, staffing, and equippage of units. Also used in acronyms as 'T/O' and 'T/E'....

 standard. Note that these are principles, but according to manpower and mission needs units can deviate from the TOE (e.g. with four subordinate units instead of three, or a commander who is a rank above or below the rank specified). Supporting units will have their own organization and equipment, but generally also follow the "rule of threes".
  • A fire team is the basic element of the GCE. It consists of four Marines: the team leader/rifleman (M4
    M4 carbine
    The M4 carbine is a family of firearms tracing its lineage back to earlier carbine versions of the M16, all based on the original AR-15 designed by Eugene Stoner and made by ArmaLite. It is a shorter and lighter variant of the M16A2 assault rifle, with 80% parts commonality.It is a gas-operated,...

    /M16
    M16 rifle
    The M16 is the United States military designation for the AR-15 rifle adapted for both semi-automatic and full-automatic fire. Colt purchased the rights to the AR-15 from ArmaLite, and currently uses that designation only for semi-automatic versions of the rifle. The M16 fires the 5.56×45mm NATO...

    ), one rifleman (M4/M16), one grenadier (M4/M16 with M203
    M203 grenade launcher
    The M203 is a single shot 40 mm grenade launcher designed to attach to a rifle. It uses the same rounds as the older M79 break-action grenade launcher, which utilize the High-Low Propulsion System to keep recoil forces low. Though versatile, and compatible with many rifle models, the M203 was...

    ) and one light machine gunner (M249
    M249 light machine gun
    The M249 light machine gun , previously designated the M249 Squad Automatic Weapon , and formally written as Light Machine Gun, 5.56 mm, M249, is an American version of the Belgian FN Minimi, a light machine gun manufactured by the Belgian company FN Herstal . The M249 is manufactured in the...

    ). The team leader is typically a Lance Corporal
    Lance Corporal
    Lance corporal is a military rank, used by many armed forces worldwide, and also by some police forces and other uniformed organizations. It is below the rank of corporal, and is typically the lowest non-commissioned officer, usually equivalent to the NATO Rank Grade OR-3.- Etymology :The presumed...

     or Corporal
    Corporal
    Corporal is a rank in use in some form by most militaries and by some police forces or other uniformed organizations. It is usually equivalent to NATO Rank Code OR-4....

    .
  • A squad
    Squad
    In military terminology, a squad is a small military unit led by a non-commissioned officer that is subordinate to an infantry platoon. In countries following the British Army tradition this organization is referred to as a section...

    is made up of three fire teams, in addition to a Corporal
    Corporal
    Corporal is a rank in use in some form by most militaries and by some police forces or other uniformed organizations. It is usually equivalent to NATO Rank Code OR-4....

     or Sergeant
    Sergeant
    Sergeant is a rank used in some form by most militaries, police forces, and other uniformed organizations around the world. Its origins are the Latin serviens, "one who serves", through the French term Sergent....

     as squad leader.
  • A rifle platoon consists of three squads, and a headquarters element made up of a Platoon Commander, a Platoon Sergeant and a Navy Corpsman. The Platoon Sergeant advises the commander, usually a 2nd or 1st Lieutenant
    Lieutenant
    A lieutenant is a junior commissioned officer in many nations' armed forces. Typically, the rank of lieutenant in naval usage, while still a junior officer rank, is senior to the army rank...

    , in making decisions.
A weapons platoon will substitute for the squads:
  • a 60 mm mortar section
    Section (military unit)
    A section is a small military unit in some armies. In many armies, it is a squad of seven to twelve soldiers. However in France and armies based on the French model, it is the sub-division of a company .-Australian Army:...

     (three squads, each of one M224 mortar
    M224 Mortar
    The M224 60 mm Lightweight Mortar is a smooth bore, muzzle-loading, high-angle-of-fire weapon used for close-in support of ground troops.-Description:The M224 system is composed of the*M225 Cannon *M170 Bipod...

     and three Marines, all led by a section leader);
  • an assault section (three squads, each of two teams, which each consist of an SMAW
    Shoulder-Launched Multipurpose Assault Weapon
    The Shoulder-Launched Multipurpose Assault Weapon is a shoulder-launched rocket weapon, based on the Israeli B-300, with the primary function of being a portable assault weapon and a secondary anti-armor rocket launcher. It was introduced to the United States armed forces in 1984...

     and two Marines), led by a section leader (thirteen Marines total); and
  • a medium machine gun section (three squads, each of a squad leader and two teams, which each consist of one M240G and three Marines).
It is led by a 2nd or 1st Lieutenant
Lieutenant
A lieutenant is a junior commissioned officer in many nations' armed forces. Typically, the rank of lieutenant in naval usage, while still a junior officer rank, is senior to the army rank...

.
  • A rifle company consists of three rifle platoons, a weapons platoon, and support staff. It is led by a Captain.
A weapons company
Weapons company
A weapons company, sometimes called a manoeuvre support company is a company-sized military unit attached to an infantry battalion to support the rifle companies of the battalion...

 will substitute for the rifle platoons an 81 mm mortar
M252 Mortar
The M252 81 mm medium weight mortar is an American smooth bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence. In the U.S. Army and U.S...

 platoon, an anti-armor platoon, and a heavy machine gun platoon. A Headquarters and Service Company
Headquarters and Service Company
A Headquarters and Service Company is a company sized military unit, found at the battalion level and higher in the United States Marine Corps. In identifying a specific headquarters unit, it is usually referred to by its abbreviation as H&S...

 consist of a headquarters platoon, a communications platoon, a service platoon, and the Battalion Aid Station.
  • A battalion
    Battalion
    A battalion is a military unit of around 300–1,200 soldiers usually consisting of between two and seven companies and typically commanded by either a Lieutenant Colonel or a Colonel...

    consists of three rifle companies, one weapons company, and one Headquarters and Service Company, commanded by a Lieutenant Colonel
    Lieutenant colonel
    Lieutenant colonel is a rank of commissioned officer in the armies and most marine forces and some air forces of the world, typically ranking above a major and below a colonel. The rank of lieutenant colonel is often shortened to simply "colonel" in conversation and in unofficial correspondence...

    .
  • A regiment
    Regiment
    A regiment is a major tactical military unit, composed of variable numbers of batteries, squadrons or battalions, commanded by a colonel or lieutenant colonel...

    consists of three battalions, led by a Colonel
    Colonel
    Colonel , abbreviated Col or COL, is a military rank of a senior commissioned officer. It or a corresponding rank exists in most armies and in many air forces; the naval equivalent rank is generally "Captain". It is also used in some police forces and other paramilitary rank structures...

  • A division
    Division (military)
    A division is a large military unit or formation usually consisting of between 10,000 and 20,000 soldiers. In most armies, a division is composed of several regiments or brigades, and in turn several divisions typically make up a corps...

    , commanded by a Major General
    Major General
    Major general or major-general is a military rank used in many countries. It is derived from the older rank of sergeant major general. A major general is a high-ranking officer, normally subordinate to the rank of lieutenant general and senior to the ranks of brigadier and brigadier general...

    , comprises three infantry regiments and an artillery regiment, and additional specialized units, such as armor.

A brigade
Brigade
A brigade is a major tactical military formation that is typically composed of two to five battalions, plus supporting elements depending on the era and nationality of a given army and could be perceived as an enlarged/reinforced regiment...

, commanded by a brigadier general, is less common in the Marine Corps, but is typically made up of one or more regiments plus support units.

Battalions and larger units have a Sergeant Major, and an Executive Officer as second in command, plus officers and others for a military staff: Administration (S-1)
Military administration
Military administration identifies both the techniques and systems used by military departments, agencies, and Armed Services involved in the management of the armed forces...

, Intelligence (S-2)
Military intelligence
Military intelligence is a military discipline that exploits a number of information collection and analysis approaches to provide guidance and direction to commanders in support of their decisions....

, Operations (S-3)
Operations (military staff)
Military Operations is a concept and application of military science that involves planning the operations for the projected maneuvering forces's provisions, services, training, and administrative functions—to allow them to commence, insert, then egress from combat...

, Logistics (S-4)
Military logistics
Military logistics is the discipline of planning and carrying out the movement and maintenance of military forces. In its most comprehensive sense, it is those aspects or military operations that deal with:...

, Civil Affairs
Civil Affairs
Civil Affairs is a term used by both the United Nations and by military institutions , but for different purposes in each case.-United Nations Civil Affairs:...

 (wartime only) (S-5), and Communications (S-6)
Military communications
Historically, the first military communications had the form of sending/receiving simple signals . Respectively, the first distinctive tactics of military communications were called Signals, while units specializing in those tactics received the Signal Corps name...

. Units of battalion size or larger may be reinforced by the addition of supporting tank
Armoured warfare
Armoured warfare or tank warfare is the use of armoured fighting vehicles in modern warfare. It is a major component of modern methods of war....

 or artillery
Artillery
Originally applied to any group of infantry primarily armed with projectile weapons, artillery has over time become limited in meaning to refer only to those engines of war that operate by projection of munitions far beyond the range of effect of personal weapons...

 units, as in the Battalion Landing Teams comprising the GCEs of Marine Expeditionary Unit
Marine Expeditionary Unit
A Marine expeditionary unit , formerly called Marine amphibious unit , is the smallest Marine air-ground task force in the United States Fleet Marine Force...

s.

The four Marine divisions are:
  • 1st Marine Division at Camp Pendleton
    Marine Corps Base Camp Pendleton
    Marine Corps Base Camp Pendleton is the major West Coast base of the United States Marine Corps and serves as its prime amphibious training base...

    , California
    California
    California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

  • 2nd Marine Division at Camp Lejeune
    Marine Corps Base Camp Lejeune
    Marine Corps Base Camp Lejeune is a United States military training facility in North Carolina. The base's of beaches make it a major area for amphibious assault training, and its location between two deep-water ports allows for fast deployments.The main base is supplemented by five satellite...

    , North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

  • 3rd Marine Division at Camp Courtney
    Camp Courtney
    Camp Courtney is a United States Marine Base located in Uruma City, Okinawa Prefecture, Japan. It is part of the larger Marine Corps Base Camp Smedley D. Butler and home to the III Marine Expeditionary Force headquarters as well as the 3rd Marine Division Headquarters. It is named after Major...

     in Okinawa, Japan
    Japan
    Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

  • 4th Marine Division, a reserve unit headquartered in New Orleans, Louisiana
    Louisiana
    Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

    , with units scattered throughout the United States.


In World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, two more Marine Divisions were formed: the Fifth and Sixth, which fought in the Pacific War
Pacific War
The Pacific War, also sometimes called the Asia-Pacific War refers broadly to the parts of World War II that took place in the Pacific Ocean, its islands, and in East Asia, then called the Far East...

. These divisions were disbanded after the end of the war. The 5th Marine Division was reactivated for service in Vietnam but was disbanded again in the early 1970s.

Aviation Combat Element

The mission of Marine Corps aviation is to provide the MAGTF commander with an Aviation Combat Element (ACE) capable of conducting air operations in support of the seizure and defense of advanced Naval bases, and conducting such land operations as may be directed by the Joint Force commander.

The ACE supports the MAGTF by providing the six functions of Marine aviation: assault support
Assault Support
Assault Support is one of the six functions of United States Marine Corps aviation and comprises those actions required to airlift personnel, supplies or equipment into or within a battle area by helicopters or fixed-wing aircraft. It provides the Marine Air-Ground Task Force commander the...

, anti-air warfare
Anti-aircraft warfare
NATO defines air defence as "all measures designed to nullify or reduce the effectiveness of hostile air action." They include ground and air based weapon systems, associated sensor systems, command and control arrangements and passive measures. It may be to protect naval, ground and air forces...

, offensive air support
Close air support
In military tactics, close air support is defined as air action by fixed or rotary winged aircraft against hostile targets that are close to friendly forces, and which requires detailed integration of each air mission with fire and movement of these forces.The determining factor for CAS is...

, electronic warfare
Electronic warfare
Electronic warfare refers to any action involving the use of the electromagnetic spectrum or directed energy to control the spectrum, attack an enemy, or impede enemy assaults via the spectrum. The purpose of electronic warfare is to deny the opponent the advantage of, and ensure friendly...

, control of aircraft and missiles
Command and Control (military)
Command and control, or C2, in a military organization can be defined as the exercise of authority and direction by a properly designated commanding officer over assigned and attached forces in the accomplishment of the mission...

, and aerial reconnaissance
Reconnaissance
Reconnaissance is the military term for exploring beyond the area occupied by friendly forces to gain information about enemy forces or features of the environment....

.

Aviation units are organized into:
  • Squadron
    Squadron (aviation)
    A squadron in air force, army aviation or naval aviation is mainly a unit comprising a number of military aircraft, usually of the same type, typically with 12 to 24 aircraft, sometimes divided into three or four flights, depending on aircraft type and air force...

    s of 6–15 aircraft in 7–8 sections, led by a Lieutenant Colonel
    Lieutenant colonel
    Lieutenant colonel is a rank of commissioned officer in the armies and most marine forces and some air forces of the world, typically ranking above a major and below a colonel. The rank of lieutenant colonel is often shortened to simply "colonel" in conversation and in unofficial correspondence...

  • Groups
    Group (air force unit)
    A group is a military aviation unit, a component of military organization and a military formation. Usage of the terms group and wing differ from one country to another, as well as different branches of a defence force, in some cases...

     of 4–6 squadrons, led by a Colonel
    Colonel
    Colonel , abbreviated Col or COL, is a military rank of a senior commissioned officer. It or a corresponding rank exists in most armies and in many air forces; the naval equivalent rank is generally "Captain". It is also used in some police forces and other paramilitary rank structures...

  • Wings
    Wing (air force unit)
    Wing is a term used by different military aviation forces for a unit of command. The terms wing, group or Staffel are used for different-sized units from one country or service to another....

     of three or more groups, led by a Major General
    Major General
    Major general or major-general is a military rank used in many countries. It is derived from the older rank of sergeant major general. A major general is a high-ranking officer, normally subordinate to the rank of lieutenant general and senior to the ranks of brigadier and brigadier general...



The four Marine aircraft wings are:
  • 1st Marine Aircraft Wing
    1st Marine Aircraft Wing
    The 1st Marine Aircraft Wing is an aviation unit of the United States Marine Corps that serves as the Aviation Combat Element of the III Marine Expeditionary Force. The wing is headquartered at Camp Foster on the island of Okinawa, Japan...

     at Marine Corps Base Camp Smedley D. Butler
    Marine Corps Base Camp Smedley D. Butler
    Marine Corps Base Camp Smedley D. Butler is a United States Marine Corps base located in the Japanese prefecture of Okinawa. It was named for legendary Marine Smedley D. Butler.-Installations:...

    , Okinawa, Japan
    Japan
    Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

  • 2nd Marine Aircraft Wing
    2nd Marine Aircraft Wing
    The 2nd Marine Aircraft Wing is the major east coast aviation unit of the United States Marine Corps and is based at Marine Corps Air Station Cherry Point, North Carolina...

     at Marine Corps Air Station Cherry Point
    Marine Corps Air Station Cherry Point
    Marine Corps Air Station Cherry Point or MCAS Cherry Point is a United States Marine Corps airfield located in Havelock, North Carolina, USA, in the eastern part of the state...

    , North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

  • 3rd Marine Aircraft Wing
    3rd Marine Aircraft Wing
    The 3d Marine Aircraft Wing is the major west coast aviation unit of the United States Marine Corps. It is headquartered at Marine Corps Air Station Miramar, California and provides the aviation combat element for I Marine Expeditionary Force...

     at Marine Corps Air Station Miramar
    Marine Corps Air Station Miramar
    Marine Corps Air Station Miramar , formerly Naval Air Station Miramar is a United States Marine Corps installation that is home to the 3rd Marine Aircraft Wing, which is the aviation element of the 1st Marine Expeditionary Force...

    , California
    California
    California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

  • 4th Marine Aircraft Wing
    4th Marine Aircraft Wing
    The 4th Marine Aircraft Wing is the reserve airwing of the United States Marine Corps. It is headquartered in New Orleans, Louisiana but its subordinate units are scattered throughout the United States...

    , a reserve unit, headquartered in New Orleans, Louisiana
    New Orleans, Louisiana
    New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...

    , with units scattered throughout the United States

Logistics Combat Element

In addition to logistics, the LCE provides engineers
Combat engineering
A combat engineer, also called pioneer or sapper in many armies, is a soldier who performs a variety of construction and demolition tasks under combat conditions...

, maintenance troops, medical personnel, and other specialized units.

The four Marine logistics groups are:
  • 1st Marine Logistics Group
    1st Marine Logistics Group
    The 1st Marine Logistics Group is a logistics unit of the United States Marine Corps and is headquartered at Marine Corps Base Camp Pendleton, California, with detachments located at Marine Corps Air Station Yuma, Marine Corps Air Station Miramar and the Marine Corps Air Ground Combat Center...

     at Camp Pendleton, California
    California
    California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

  • 2nd Marine Logistics Group
    2nd Marine Logistics Group
    The 2nd Marine Logistics Group is a logistics unit of the United States Marine Corps and is headquartered at Marine Corps Base Camp Lejeune, North Carolina. 2nd MLG was formerly known as 2nd Force Service Support Group , reorganized with its sister FSSGs into Marine Logistics Groups in 2005...

     at Camp Lejeune, North Carolina
    North Carolina
    North Carolina is a state located in the southeastern United States. The state borders South Carolina and Georgia to the south, Tennessee to the west and Virginia to the north. North Carolina contains 100 counties. Its capital is Raleigh, and its largest city is Charlotte...

  • 3rd Marine Logistics Group
    3rd Marine Logistics Group
    The 3rd Marine Logistics Group is a logistics unit of the United States Marine Corps and is headquartered at Camp Smedley Butler, Okinawa, Japan. 3d MLG was formerly the 3rd Force Service Support Group , with official redesignation on 28 October 2005...

     at Camp Kinser
    Camp Kinser
    Camp Kinser is a United States Marine Corps base in Okinawa, Japan. Another military installation is located south of Camp Kinser, but it belongs to the US Army.-External links:* *...

    , Okinawa, Japan
    Japan
    Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

  • 4th Marine Logistics Group
    4th Marine Logistics Group
    The 4th Marine Logistics Group is a logistics unit of the United States Marine Corps and is headquartered at New Orleans, Louisiana.-Mission:...

    , a reserve unit, headquartered in New Orleans, Louisiana
    New Orleans, Louisiana
    New Orleans is a major United States port and the largest city and metropolitan area in the state of Louisiana. The New Orleans metropolitan area has a population of 1,235,650 as of 2009, the 46th largest in the USA. The New Orleans – Metairie – Bogalusa combined statistical area has a population...

    , with units scattered throughout the United States.

Marine Corps Special Operations Components

Although the notion of a Marine special warfare contribution to the U.S. Special Operations Command
United States Special Operations Command
The United States Special Operations Command is the Unified Combatant Command charged with overseeing the various Special Operations Commands of the Army, Air Force, Navy and Marine Corps of the United States Armed Forces. The command is part of the Department of Defense...

 (USSOCOM) was considered as early as the founding of USSOCOM in the 1980s, it was resisted by the Marine Corps. Then Commandant Paul X. Kelley
Paul X. Kelley
General Paul Xavier Kelley was the twenty-eighth Commandant of the United States Marine Corps, from July 1, 1983 to June 30, 1987....

 expressed the popular belief that Marines should support Marines, and that the Corps should not fund a special warfare capability that would not support Marine operations. However, resistance from within the Marine Corps dissipated when Marine leaders watched the Corp's "crown jewels" - the 15th
15th Marine Expeditionary Unit
The 15th Marine Expeditionary Unit is one of seven Marine Expeditionary Units currently in existence in the United States Marine Corps. The Marine Expeditionary Unit is a Marine Air Ground Task Force with a strength of about 2,200 personnel...

 and 26th MEU (Special Operations Capable)
26th Marine Expeditionary Unit
The 26th Marine Expeditionary Unit is one of seven Marine Expeditionary Units currently in existence in the United States Marine Corps. The Marine Expeditionary Unit is a Marine Air-Ground Task Force with a strength of about 2,200 personnel. The MEU consists of four major parts: a command element,...

 (MEU(SOC)s) sit on the sidelines during the early stages of Operation Enduring Freedom while other special warfare units led the way. After a three-year development period, the Marine Corps in 2006 agreed to supply a 2,700 - strong unit, Marine Forces Special Operations Command
Marine Forces Special Operations Command
United States Marine Corps Special Operations Command is a component command of the US Special Operations Command that comprises the Marine Corps' contribution to SOCOM. Its core capabilities are direct action, special reconnaissance and foreign internal defense...

 (MARSOC), which would answer directly to USSOCOM.

Marine Special Operations Command

The Marine Special Operations Command is the Marine Corps's special operations component
United States Special Operations Forces
United States Special Operations Forces under United States Special Operations Command are active and reserve component forces of U.S. Military...

 that reports to United States Special Operations Command
United States Special Operations Command
The United States Special Operations Command is the Unified Combatant Command charged with overseeing the various Special Operations Commands of the Army, Air Force, Navy and Marine Corps of the United States Armed Forces. The command is part of the Department of Defense...

 (USSOCOM). Also, it is the first and only fully "unconventional
Unconventional warfare
Unconventional warfare is the opposite of conventional warfare. Where conventional warfare is used to reduce an opponent's military capability, unconventional warfare is an attempt to achieve military victory through acquiescence, capitulation, or clandestine support for one side of an existing...

 and special warfare" operators. Currently, MARSOC trains, organizes, equips and, when directed by the Commander, USSOCOM, deploys task organized, scalable, and responsive U.S. Marine Corps special operations forces worldwide in support of combatant commanders and other agencies.

The MSOAG, formerly the FMTU, has been operating since 2005, before MARSOC formally existed. MARSOC was formally activated during a February 24 ceremony at Camp Lejeune, N.C., where MARSOC is now headquartered. Fox Company, 2nd Marine Special Operations Battalion, was the first of the Marine Special Operations Battalions' companies to activate in the Spring of 2006. Drawing its manpower from the core of 2nd Force Reconnaissance Co., Fox Company's creation came at the expense of 2nd Force Reconnaissance Co., which stood down upon the transfer of its platoons to both MARSOC's 2nd Marine Special Operations Battalion, and a new company (Delta) of 2nd Reconnaissance Battalion.

Marine Corps (Special Operations Capable) forces

The Special Operation Capable forces are the units of the Marine Corps that are fully equipped, and prepared for any hostile, or emergency worldwide. Being very co-dependent of the air-ground task force
Marine Air-Ground Task Force
The Marine Air-Ground Task Force is a term used by the United States Marine Corps to describe the principal organization for all missions across the range of military operations. MAGTFs are a balanced air-ground, combined arms task organization of Marine Corps forces under a single commander that...

, they are capable of conducting special operations
Special operations
Special operations are military operations that are considered "special" .Special operations are typically performed independently or in conjunction with conventional military operations. The primary goal is to achieve a political or military objective where a conventional force requirement does...

 in conventional warfare
Conventional warfare
Conventional warfare is a form of warfare conducted byusing conventional military weapons and battlefield tactics between two or more states in open confrontation. The forces on each side are well-defined, and fight using weapons that primarily target the opposing army...

, and often overlapping in unconventional methods, comparable to other special operations forces of maritime regions. Many special mission tasks are mostly infantry support units, such as reconnaissance, ANGLICO, and others.

See also


  • List of United States Marine Corps brigades
  • List of Marine Expeditionary Units
  • Headquarters Marine Corps
    Headquarters Marine Corps
    Headquarters Marine Corps is a headquarters staff within the Department of the Navy which includes the offices of the Commandant of the Marine Corps, the Assistant Commandant of the Marine Corps and various staff functions...

  • Marine Corps Intelligence Command
    Marine Corps Intelligence Command
    The Marine Corps Intelligence Command was created in 1988 by then Commandant of the Marine Corps Alfred M. Gray, Jr.He created this organization to address the lack of expeditionary intelligence support for policy, acquisition, and operations, as each of the service intelligence centers focused...

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