
A troop is a military
sub-subunit
Sub-subunit or sub-sub-unit is a subordinated element below platoon level of company-sized units or sub-units which normally might not be separately identified in authorization documents by name, number, or letter. Fireteams, squads, crews, s ...
, originally a small formation of
cavalry, subordinate to a
squadron. In many armies a troop is the equivalent element to the
infantry
Infantry is a military specialization which engages in ground combat on foot. Infantry generally consists of light infantry, mountain infantry, motorized infantry & mechanized infantry, airborne infantry, air assault infantry, and m ...
section
Section, Sectioning or Sectioned may refer to:
Arts, entertainment and media
* Section (music), a complete, but not independent, musical idea
* Section (typography), a subdivision, especially of a chapter, in books and documents
** Section sign ...
or
platoon
A platoon is a military unit typically composed of two or more squads, sections, or patrol
A patrol is commonly a group of personnel, such as Law enforcement officer, law enforcement officers, military personnel, or Security guard, secur ...
. Exceptions are the
US Cavalry and the
King's Troop Royal Horse Artillery where a troop is a subunit comparable to an infantry
company or
artillery battery
In military organizations, an artillery battery is a unit or multiple systems of artillery, mortar systems, rocket artillery, multiple rocket launchers, surface-to-surface missiles, ballistic missiles, cruise missiles, etc., so grouped to fa ...
. Historically the remainder of the
Royal Horse Artillery
The Royal Horse Artillery (RHA) was formed in 1793 as a distinct arm of the Royal Regiment of Artillery (commonly termed Royal Artillery) to provide horse artillery support to the cavalry units of the British Army. (Although the cavalry link r ...
used the term Troop in the same manner however they are now aligned with the rest of the
Royal Regiment of Artillery
The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
in referring to Troops as subordinate to artillery batteries.
Troops is often used to refer to the other members of one's company or cause, but because of its military connotations, it conveys a particularly altruistic type of dedicated worker. Traditionally, troops refers to the soldiers in a military.
A cavalry soldier of
private rank
A private is a soldier, usually with the lowest rank in many armies. Soldiers with the rank of Private may be conscripts or they may be professional (career) soldiers.
The term derives from the medieval term "private soldiers" (a term still u ...
is called a
trooper in many
Commonwealth
A commonwealth is a traditional English term for a political community founded for the common good. Historically, it has been synonymous with " republic". The noun "commonwealth", meaning "public welfare, general good or advantage", dates from th ...
armies (abbreviated "Tpr", not to be confused with "trouper").
A related sense of the term "troops" refers to members of the military collectively, as in "the troops"; see
Troop (disambiguation).
In some countries, like
Italy
Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical ...
, the company-level cavalry unit is called "Squadron".
Troops in various forces
Today, a troop is defined differently in different armed forces.
In the
Australian Army
The Australian Army is the principal Army, land warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Royal Australian Air Force. The Army is commanded by the Chief of Army (Austral ...
a troop is the equivalent of a platoon sized element in units of certain corps, those being:
*
Royal Australian Armoured Corps
*
Royal Regiment of Australian Artillery
*
Royal Australian Engineers
The Royal Australian Engineers (RAE) is the military engineering corps of the Australian Army (although the word corps does not appear in their name or on their badge). The RAE is ranked fourth in seniority of the corps of the Australian Army, be ...
*
Royal Australian Corps of Signals
The Royal Australian Corps of Signals (RASigs) is one of the 'arms' (combat support corps) of the Australian Army. It is responsible for installing, maintaining, and operating all types of telecommunications equipment and information systems. The m ...
*
Australian Army Aviation
Australian Army Aviation (AAAvn) is a corps of the Australian Army. It was formed on 1 July 1968, although it has a history dating back to 1911, when the Minister of Defence at the time, Senator George Pearce, decided there should be a flying s ...
*
Royal Australian Corps of Transport
The Royal Australian Corps of Transport (RACT) is a corps within the Australian Army. The RACT is ranked tenth in seniority of the corps of the Australian Army, and is the most senior logistics corps. It was formed on 1 June 1973 as an amalgam ...
*
Royal Australian Survey Corps
The Royal Australian Survey Corps (RA Svy) was a Corps of the Australian Army, formed on 1 July 1915 and disbanded on 1 July 1996. As one of the principal military survey units in Australia, the role of the Royal Australian Survey Corps was to pro ...
(now disbanded)
*
Special Air Service Regiment (SASR)
The SASR is the only unit in the
Royal Australian Infantry Corps
The Royal Australian Infantry Corps (RA Inf) is the parent corps for all infantry regiments of the Australian Army. It was established on 14 December 1948, with its Royal Corps status being conferred by His Majesty King George VI. At her corona ...
to use the term troop to refer to its platoon size elements. SASR troops are also unusual as they are commanded by a captain—most troop/platoon sized elements are commanded by a lieutenant. In most cases, units which refer to platoon sized elements as troops refer to company-sized elements as squadrons and battalion-sized elements as regiments (regiments in the
RAA use the term '
Battery' for company-sized elements). Privates in the
RAAC
The Royal Australian Armoured Corps (RAAC) is a corps of the Australian Army which provides the Australian Defence Force's Armoured warfare, armour capability. Armour combines firepower, mobility, protection and networked situational awareness t ...
and SASR hold the rank "trooper", however this is not the case for any other Corps/units which use the term troops.

In the
British Army
The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gur ...
the definition of a troop varies by
corps
Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was first named as such in 1805. The size of a corps varies great ...
.
*
Household Cavalry
The Household Cavalry (HCav) is made up of the two most senior regiments of the British Army, the Life Guards and the Blues and Royals (Royal Horse Guards and 1st Dragoons). These regiments are divided between the Household Cavalry Regiment s ...
and
Royal Armoured Corps
The Royal Armoured Corps is the component of the British Army, that together with the Household Cavalry provides its armour capability, with vehicles such as the Challenger 2 Tank and the Scimitar Reconnaissance Vehicle. It includes most of the ...
: Three or four
armoured fighting vehicle
An armoured fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured ca ...
s commanded by a
subaltern, i.e. effectively the same level element as an infantry platoon. A unit of two to four guns or launchers, or an equivalent headquarters unit.
*
Royal Artillery
The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...
: A half-battery. In the
Royal Horse Artillery
The Royal Horse Artillery (RHA) was formed in 1793 as a distinct arm of the Royal Regiment of Artillery (commonly termed Royal Artillery) to provide horse artillery support to the cavalry units of the British Army. (Although the cavalry link r ...
, a troop used to be the equivalent to a battery in other artillery units.
*
Royal Engineers,
Royal Corps of Signals
The Royal Corps of Signals (often simply known as the Royal Signals – abbreviated to R SIGNALS or R SIGS) is one of the combat support arms of the British Army. Signals units are among the first into action, providing the battlefield commun ...
,
Royal Logistic Corps
The Royal Logistic Corps provides logistic support functions to the British Army. It is the largest Corps in the Army.
History
The Royal Logistic Corps (RLC) was formed on 5 April 1993, by the union of five British Army corps:
* Royal Engin ...
,
Special Air Service
The Special Air Service (SAS) is a special forces unit of the British Army. It was founded as a regiment in 1941 by David Stirling and in 1950, it was reconstituted as a corps. The unit specialises in a number of roles including counter-ter ...
, and
Honourable Artillery Company
The Honourable Artillery Company (HAC) is a reserve regiment in the British Army. Incorporated by royal charter in 1537 by King Henry VIII, it is the oldest regiment in the British Army and is considered the second-oldest military unit in the w ...
(and formerly the
Royal Corps of Transport
The Royal Corps of Transport (RCT) was a British Army Corps established to manage all matters in relation to the transport of men and material for the Army and the wider Defence community. It was formed in 1965 and disbanded in 1993; its units and ...
): A unit equivalent in size to a platoon in other corps, divided into sections or patrols. The Royal Engineers and Royal Corps of Signals used platoons instead until after World War II.
Other Army corps do not use the term.
In the
Royal Marines
The Corps of Royal Marines (RM), also known as the Royal Marines Commandos, are the UK's special operations capable commando force, amphibious light infantry and also one of the five fighting arms of the Royal Navy. The Corps of Royal Marine ...
, a troop is the equivalent to an Army platoon; a carryover from the organisation of the
British Commandos
The Commando, Commandos, also known as the British Commandos, were formed during the World War II, Second World War in June 1940, following a request from Winston Churchill, for special forces that could carry out Raid (military), raids against ...
in World War II.
In the
Canadian Army
The Canadian Army (french: Armée canadienne) is the command (military formation), command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases acr ...
, a troop is the equivalent of a platoon within the armoured, artillery, engineer, and signals branches. Two to four troops comprise the main elements of a squadron.
In the
United States Army
The United States Army (USA) is the land warfare, land military branch, service branch of the United States Armed Forces. It is one of the eight Uniformed services of the United States, U.S. uniformed services, and is designated as the Army o ...
, in the Cavalry branch, a troop is the equivalent unit to the infantry company, commanded by a captain and consisting of three or four platoons, and are called a troop within a Regiment. Companies were renamed troops in 1883.
Troops in civilian organizations
In the United States,
state police
State police, provincial police or regional police are a type of sub-national territorial police force found in nations organized as federations, typically in North America, South Asia, and Oceania. These forces typically have jurisdiction ...
forces are often regionally divided into troops. This usage came about from these organizations modelling themselves on the US Army, and especially the
older cavalry units. For this same reason the state police and highway patrol personnel of most states are known as "trooper" rather than "officer".
In
Scouting
Scouting, also known as the Scout Movement, is a worldwide youth Social movement, movement employing the Scout method, a program of informal education with an emphasis on practical outdoor activities, including camping, woodcraft, aquatics, hik ...
, a
scout troop is a unit made up of scouts or
guides from the same locality under a
leader
Leadership, both as a research area and as a practical skill, encompasses the ability of an individual, group or organization to "lead", influence or guide other individuals, teams, or entire organizations. The word "leadership" often gets view ...
. In the case of Guides, the term "company" is used more often, and was used by
the founder in his first books about guiding.
References
{{reflist
Military units and formations by size