Editing Company (military unit) (section)

==United States==

===Army===
{{main|Company (United States Army)}}
[[File:75th Ranger Regiment Bravo Company 3rd Battalion Somalia 1993.jpg|thumb|right|Company B, 3rd Battalion, of the [[75th Ranger Regiment]] in Somalia, 1993.]]

====Historical background====
In the 1700s, British Army, [[Militia (United States)#History|American Colonial Militia]], and Provincial Regulars (e.g., the [[Virginia Regiment]]), and later American Army infantry, regiments were organized into companies of somewhat less than 100 officers and enlisted men, although the actual totals widely varied. For example, in 1775, a typical British Army infantry company contained only 47 personnel (comprising 3 officers, 5 noncommissioned officers, a drummer, and 38 privates). However, by 1792, an American infantry company contained 98 personnel (comprising 3 officers, 9 noncommissioned officers, a drummer, a fifer, and 84 privates).<!--You use 'including' when you list only some of the components-->

Beginning in 1775, American forces began to develop their own organizational doctrine somewhat based on the Franco-Prussian model (with much influence beginning in 1777 from Continental European expatriates and future American generals the [[Gilbert du Motier, Marquis de Lafayette#American Revolution|Marquis de Lafayette]] of France, [[Casimir Pulaski#In the United States|Count Casimir Pulaski]] of Poland, and [[Friedrich Wilhelm von Steuben#American Revolution|Baron von Steuben]] of Prussia). As a result, in 1776, a Continental Army Infantry company was authorized one captain, one first lieutenant, one second lieutenant (both lieutenants serving as platoon commanders – not designated as platoon ''leaders'' until 1943 under the "Triangular Division" reorganization begun in 1939), an ensign (an obsolete subaltern officer rank charged with carrying the regimental colors in rotation with the other ensigns of the battalion/regiment), four sergeants (section leaders/squad leaders with two to a platoon), four corporals (assistant section leaders/squad leaders with two to a platoon), two musicians (a drummer and a fifer), and 76 privates. The company was organized into two platoons, each consisting of two sections/squads (the terms were sometimes used interchangeably) consisting of one sergeant, one corporal, and 19 privates. (Wright, 1983)<ref>Wright, R. ''The Continental Army'' (1983) Center of Military History: Washington, DC</ref>

From the late 1700s up until the late 1800s, a US infantry company was commanded by a captain and assisted by a [[first sergeant]] (first authorized in 1781), and consisted of a small company headquarters and two identical platoons commanded by lieutenants. Even though from 1808 until 1821 companies were authorized two first lieutenants and two second lieutenants (and again from 1861 to 1866 for two second lieutenants), the positions of company executive officer (second-in-command) and a third platoon commander were not authorized until 1898 when the army expanded under mobilization for the war with Spain. During the 1800s the authorized strength of infantry companies fell to a low of 54 officers and men during periods of relative peace from 1821 to 1838 and again from 1842 to 1846. In contrast, from 1812 to 1815 (second war with Great Britain), 1846 to 1848 (war with Mexico), 1861 to 1890 (American civil war and wars with the plains Indians), and 1898–1899 (war with Spain) authorized company strength ranged from over 100 officers and men up to a high of 119. Also, in 1861 a company quartermaster sergeant was added to the authorized manning of an infantry company and a wagoner was reinstituted (previously authorized from 1796 to 1808) to drive the company supply wagon.

During the 1700s and up until the late 1800s, the company was an administrative and tactical unit seldom employed in other than as a massed formation. The standard procedure, once the company had marched into its position in the line of battle, was for the company to form facing the enemy as two ranks, by platoon, one behind the other. The commanding officer (a captain), and the one to four lieutenants (depending upon the time period) serving as platoon commanders/assistant platoon commanders (1808 to 1821) and the executive officer would direct the fighting, leading from the front in the attack and on the flanks in the defense. The executive officer, or more usually the junior lieutenant, and the first sergeant were normally positioned behind the battle line so as to assist the company commander in overseeing the company and managing the rear (company trains with the quartermaster sergeant and wagoner, casualties, enemy prisoners, non-combatants, deserters, etc.). The sergeants, acted as "file closers", working the line by putting men forward to replace casualties in the front rank, encouraging men to fire, reload, move forward, etc. and if need be, physically assisting or restraining men who refused to move forward or attempted to flee. The corporals physically led by example (much like modern fire team leaders) by taking their place in the line with their privates and fighting alongside them.

The ensign, the junior officer in the company from 1775 until 1808 and nominally the "color bearer", usually either personally carried the regimental battle flag or supervised the detailed party of NCOs and privates drawn from the companies tasked with bearing and protecting the flag. The rank and position of ensign (as well as cornet in mounted units) was eliminated in the early 1800s when incumbents were converted to second lieutenants. It had already become the custom to assign a veteran sergeant to carry the national colors as only regiments and separate battalions were authorized to carry a "battle flag". A special group of NCOs, led by the "color sergeant", chosen for their experience and fighting skills, were detailed from the companies to the regimental headquarters to carry and defend the national colors (the United States flag) and the regimental colors (the regiment's unique standard bearing its branch and regiment designation as well as its battle honors and unit decorations).

The musicians remained with the commanding officer to relay orders by sound (i.e., musical notes and drumbeats). Sometimes, the regimental commander would group the musicians as a regimental band positioned behind the left center company in the line of battle, with the drummers forming a regimental drum-line for use by the regimental commander in giving orders to the several companies by drumbeats. As needed, the musicians also served as orderlies and guards at either the company or battalion/regimental headquarters and in combat served as messengers, water carriers, stretcher bearers, and temporarily guarded enemy prisoners of war until they were passed to the rear for processing and internment.

In 1898, with the expansion of the rifle company to three platoons under mobilization for the [[Spanish–American War]], the company gained two officers (an additional first lieutenant as executive officer and an additional second lieutenant to command the third platoon). Additionally, there was an increase in the number of noncommissioned officers (NCOs) to serve as section leaders (sergeants) and squad leaders (corporals) to the point that in 1901 with the increase in privates to 127 (from 84 in 1898) that there were then authorized 18 corporals and six sergeants, along with two buglers (the bugle having replaced both the drum and the fife in infantry companies), the wagoner, two senior NCOs (first sergeant and quartermaster sergeant), and five officers for a total of 161 officers and men. In 1905, a mess sergeant was added to the company's senior NCO staff and the company quartermaster sergeant was renamed supply sergeant.

Due to mobilization for World War I, the army adopted its "square division" organization structure, significantly increasing unit sizes from platoon up. In 1917, a fourth platoon was added to the company, increasing its size to 256 officers and men, including six officers (a captain as commanding officer, a first lieutenant as executive officer, and two first lieutenants and two second lieutenants as platoon commanders). Enlisted strength became: three senior NCOs (first sergeant, supply sergeant, and mess sergeant), 12 sergeants, 33 corporals (one company clerk and 32 squad leaders with eight per platoon), eight specialists (four cooks and four mechanics), two buglers, 64 privates first class, and 128 privates. Of the 12 sergeants, while eight of them continued to serve as section leaders (with two in each platoon), the four senior ranking sergeants were assigned to a new position in each platoon headquarters as "assistant to platoon commander". This was the forerunner of the modern platoon sergeant slot created in 1943 (originally known in 1940 as the "platoon leader", as the officer was styled as the "platoon commander" until 1943) to provide an experienced senior NCO as an advisor and second-in-command to the officer commanding the platoon.

Cavalry companies (not officially re-designated as "troops" until 1883) had a similar organization to the infantry, but with fewer men, companies rarely exceeding around 70 men. In the Field Artillery, the company-equivalent unit is designated as a "battery" and historically consisted of a battery headquarters and two or three gun platoons, each with two gun sections. At full authorized strength, a typical battery of six gun sections would consist of approximately 100 officers and enlisted men.

====Modern use====
{{unreferenced section|date=September 2021}}
[[File:Stryker Brigade Combat Team Infantry Rifle Company.jpg|thumb|right|[[Stryker]] [[Stryker Brigade Combat Team|BCT]] Rifle Company, 2010.]]
In the [[United States Army]], [[infantry]] companies are usually made up of three rifle [[platoon]]s and a [[heavy weapons platoon]]; [[mechanized infantry]] companies are usually made up of three rifle platoons consisting of four infantry fighting vehicles (IFV) each and a command element containing two IFVs; tank companies are usually made up of three tank platoons consisting of four tanks each and a command element containing two tanks; support companies are typically divided into platoons of specialization that may contain additional special sections. A company is usually commanded by a [[Captain (U.S. Army)|captain]], although in some cases they may be commanded by a [[First Lieutenant#United States|first lieutenant]] or a [[Major (United States)|major]]. Unlike its component platoons, a company typically has additional positions of supporting staff, such as an [[executive officer]] (XO), a first sergeant, a readiness/training NCO, and other positions (e.g., supply sergeant, armorer). The corresponding unit of [[artillery]] is always called a ''[[artillery battery|battery]]''. Similarly, the term ''troop'' is used for [[cavalry]] units, including both the horse-mounted units of history as well as modern armored cavalry and air cavalry units.

Companies that are not separate from their parent [[battalion]] are identified by letter—for example, "Company A, 1st Battalion, 15th Infantry Regiment". This would commonly be abbreviated as "A/1-15 INF" in writing, but not in speaking. The dash in "1–15" indicates that the unit's history stems from the 15th Infantry Regiment of the Army, in its lineage. Companies normally do not have their own overhead, but share the overhead of the parent organization. When the regimental headquarters exists as a separate echelon of command (e.g., the 75th Ranger Regiment, the 11th Armored Cavalry Regiment, and the 1st Marine Regiment), as virtually all U.S. Army regiments did until after the Korean War, a slash separates the battalion/squadron number from the regimental number (i.e., B/2/75 Ranger, C/3/11 ACR, E/2/1 Marines).

Although not official designations, the letters are often pronounced in "GI slang" using the [[NATO phonetic alphabet]] or, before that, the [[Joint Army/Navy Phonetic Alphabet]], resulting in names such as "Bravo Company" and "Echo Company" (formerly "Baker" and "[[Easy Company|Easy]]" companies, respectively). Companies with a separate [[table of organization and equipment]] (TO&E) are identified by a number, and are able to operate completely independently from any other unit's support. Company-sized units that are organized under a table of distribution and allowance (TDA) are identified with a name or number.<!--- TDA companies have no overhead ability whatsoever, but are not organic, and so must be attached to a parent unit for overhead purposes.--->

Company-sized units usually consist of four to six platoons each led by a [[lieutenant]], although there are examples of combat service and combat service support companies that have seven or more platoons. For example, a transportation terminal service company normally has two ship platoons, two shore platoons, one documentation platoon, one maintenance platoon, and the headquarters platoon.

While companies are typically commanded by captains, some have a special operational capacity that requires them to be commanded by an officer with greater command authority and experience; such companies are commanded by majors, and have platoons commanded by captains. Examples of this arrangement include [[aviation platoon]]s, military intelligence companies, military police companies, and [[special forces]] companies. A captain reports to his commander, usually the battalion commander (a [[lieutenant colonel]]). However, there are some administrative and other duties at battalion level and larger ([[brigade]] or [[division (military)|division]]) that are also handled by captains, for example the [[staff officer|S-1, S-2, & S-4]] officers of a battalion (S-3 is a major), or some assistant staff positions in the G shops at division.

The senior non-commissioned officer of a company is called a [[first sergeant]]. Any sergeant holding this position is referred to as "first sergeant" regardless of actual rank, though the non-commissioned officer assigned ordinarily has the rank of first sergeant. A [[master sergeant]] assigned to this position will be "laterally promoted" to the rank of first sergeant, unless the appointment is temporary. In some instances, a sergeant first class will be appointed to the job in lieu of a rank-qualified first sergeant or master sergeant. Again, in such situations, the NCO holds the duty position and title of "First Sergeant", while retaining the rank of sergeant first class.

===Marine Corps===
;Rifle Company
*Company Headquarters
** Company Commander (Commanding Officer/CO) – Captain (O-3)
** Executive Officer (XO) – usually a First Lieutenant (O-2)
** First Sergeant (1stSgt, E-8)
** Gunnery Sergeant (GySgt, E-7)
** Property NCO (Sgt, E-5)
** Messenger/Driver (Pvt-LCpl, E-1/3)
* Rifle Platoon (3)
** Platoon Headquarters
*** Platoon Commander – Lieutenant (O-1/2)
*** Platoon Sergeant – Staff Sergeant (E-6)
*** Platoon Guide – Sergeant (E-5)
*** Messenger – (Pvt-LCpl, E-1/3)
** Rifle Squad (3)
*** Squad Leader – Sergeant (E-5)
*** Fire Team (3)
**** Team Leader/Grenadier – Corporal (E-4)
**** Automatic Rifleman – Lance Corporal (E-3)
**** Assistant Automatic Rifleman – (Pvt-LCpl, E-1/3)
**** Rifleman/Scout – (Pvt-LCpl, E-1/3)
* Weapons Platoon
** Platoon Headquarters
*** Platoon Commander – usually a First Lieutenant (O-2)
*** Platoon Sergeant – Gunnery Sergeant (E-7)
** Machine Gun Section (6 – [[M240 machine gun|M240G 7.62mm general-purpose machine guns]])
*** Section Leader – Staff Sergeant (E-6)
*** Machine Gun Squad (3)
**** Squad Leader – Sergeant (E-5)
**** Machine Gun Team (2)
***** Team Leader – Corporal (E-4)
***** Gunner – Lance Corporal (E-3)
***** Ammunition Man – (Pvt-LCpl, E-1/3)
** LWCMS Mortar Section (3 – [[M224 mortar|M224 60mm Light Weight Company Mortar Systems]])
*** Section Leader – Staff Sergeant (E-6)
*** Mortar Squad (3)
**** Squad Leader/Gunner – Corporal (E-4)
**** Assistant Gunner – Lance Corporal (E-3)
**** Ammunition Man (2) – (Pvt-LCpl, E-1/3)
** Assault Section (6 – [[Mk 153 Shoulder-Launched Multipurpose Assault Weapon|Mk153 SMAW Shoulder-launched Multipurpose Assault Weapon launchers]])
*** Section Leader – Sergeant (E-5)
*** Assault Squad (3)
**** Squad Leader/Team Leader/Gunner – Corporal (E-4)
**** Team Leader/Gunner – Lance Corporal (E-3)
**** Assistant Gunner (2) – (Pvt-LCpl, E-1/3)
*Attachments (notional, dependent upon mission and availability)
** Company Medical Team from Medical Platoon, Headquarters and Service Company, Infantry Battalion
** Forward Observer from Fire Direction Center, [[81 mm mortar|81mm Mortar]] Platoon, Weapons Company, Infantry battalion
** Forward Air Control Party from S-3 Section and Communications Platoon, Headquarters and Service Company, Infantry Battalion
** Forward Observer Team from the Battalion's Direct Support [[HOWITZER 155 mm HM 41|155mm Howitzer Battery]], Artillery Battalion
** Dining Facility Team from Dining Facility Section, Service Platoon, Headquarters and Service Company, Infantry Battalion
** Heavy Machine Gun Squad/Section ([[M2 Browning|M2HB .50 cal. BMG]] and/or [[Mk 19 grenade launcher|Mk 19 40mm AGL]]) from Heavy Machine Gun Platoon, Weapons Company, Infantry Battalion
** Javelin Squad (4 – [[FGM-148 Javelin|FGM-148 Javelin Anti-Tank Missile launchers]]) from Javelin Section, Antiarmor Platoon, Weapons Company, Infantry Battalion
** Antitank (TOW) Squad (2 – [[BGM-71 TOW|BGM-71 Tube launched, Optically tracked, Wire command link guided missile launchers]]) from Antitank (TOW) Section, Antiarmor Platoon, Weapons Company, Infantry Battalion
** Amphibious Assault Vehicle (AAV) Platoon (12 – [[Assault Amphibious Vehicle|AAV-7 Amphibious Assault Vehicles]]) from the Battalion's Direct Support AAV Company/Battalion
** Tank Section/Platoon (2/4 [[M1 Abrams|M1A2 Main Battle Tanks]]) from the Battalion's Direct Support Tank Company/Battalion
** Light Armored Reconnaissance (LAR) Platoon (4 [[LAV-25|LAV-25 Light Armored Reconnaissance Vehicles]]) from the Battalion's Direct Support LAR Company/Battalion
** Other Ground Combat Element assets as required (e.g., Scout Sniper, Reconnaissance, Combat Engineer, etc.)

;[[Weapons company#United States Marine Corps|Weapons company]]
A weapons company has in place of the three rifle platoons, an 81&nbsp;mm mortar platoon, an anti-armor platoon, and a heavy machine gun platoon.

;[[Headquarters and Service Company]]
*Headquarters Platoon consists of Marines from S-1, S-2, S-3, the Nuclear, Biological, Chemical Defense section, and the Chaplain section (one Navy chaplain and an enlisted religious program specialist).
*Communications Platoon, consisting of Radiomen, Wiremen, Techs, Data Marines, and the associated staff.
*Service Platoon, consisting of S-4, Motor Transportation, Food Service, armorers, and Supply.
*[[Scout Sniper Platoon]].
*Medical Platoon, which includes all of the Navy medical personnel for the rifle companies and the Battalion Aid Station (BAS). The allowance of 65 hospital corpsmen and two Medical Corps officers (doctors) is usually not completely staffed. As such, the BAS usually fields one doctor and 10–12 hospital corpsmen. The remaining personnel are assigned to the rifle companies, usually five hospital corpsmen per company.

;Tank and [[Light Armored Reconnaissance]] (LAR) companies
USMC tank and LAR companies are organized similarly to US Army tank and mechanized infantry companies, with the three line platoons consisting of four tanks or LAVs each, and the company command element containing two tanks or LAVs.

;[[Amphibious Assault Vehicle|Assault Amphibian Vehicle]] (AAV) companies
AAV companies have three platoons containing four sections of three AAVs each, for a total of 12 AAVs per platoon, and a headquarters section of three AAVs. The company also includes both command and recovery variants of the AAV, giving the company a grand total of approximately 42–45 AAVs.