Troop

Troop (pronounced troop)

(1) An assemblage of persons or things; company; band.

(2) A great number or multitude.

(3) In historic military use, (usually) an armored cavalry, cavalry or artillery battery consisting of two or more platoons and a headquarters group.

(4) As troops, a body of soldiers, police etc.

(5) A unit of Boy Scouts or Girl Scouts usually having a maximum of 32 members under the guidance of an adult leader.

(6) A herd, flock or swarm of some living creatures.

(7) A band or troupe of actors (archaic).

(8) To gather in a company; flock together.

(9) To come, go, or pass in great numbers; throng; to walk, as if in a march; go; to walk, march, or pass in rank or order:

(10) To associate or consort (usually followed by with).

(11) In British military use, to carry (the flag or colors) in a ceremonial way before troops (used also by the military in some countries where military traditions have been influenced by the British).

(12) To assemble or form into a troop or troops.

(13) An alternative spelling of troupe (archaic).

(14) In British military slang, formerly to report a soldier for a breach of discipline (archaic).

(15) An alternative word for consort (archaic).

(16) The collective noun for a group of baboons.

(17) In music, a particular roll of the drum; a quick march.

(18) In mycology, mushrooms that are in a close group but not close enough to be called a cluster.

1545: From the French troupe, from the Old French trope (band of people, company, troop, crowd), of uncertain origin but perhaps from the Frankish throp (assembly, gathering of people), from the Proto-Germanic þurpą (village, land, estate), from the primitive Indo-European treb- (dwelling, settlement) or a back-formation of troupeau, diminutive of the Medieval Latin troppus (flock) and Middle French troupe, from which Modern French gained troupeau (herd)), the construct being trop- (from the Germanic form thorp) + -el, from the Latin –ellus, the diminutive suffix.  There may have been some connection with the Old English ðorp or the Old Norse thorp (village) and the Oxford English Dictionary (OED) suggest the French form was from the Latin troppus (flock) of unknown origin but may also have been picked-up from the (speculative) Germanic source.  Doublet of troupe, and possibly also of thorp and dorp; it was cognate with the German Dorf (village).

It came to be applied to groups of animals in the 1580s, the military adoption for a “subdivision of a cavalry force" dating from the same time, the general use of ‘troop” to describe any “armed forces” attested from the 1590s.  Troops were part of the structure in the Boy Scouts from the organization's beginnings in 1908, the Girl Scouts emulating this upon formation four years later.  In modern use, the spelling troupe has assumed the exclusive use of describing a company of actors, singers, acrobats or other entertainers and performers.

The noun troop is a linguistic curiosity.  It’s used as a collective noun (a troop of girl-scouts) and in the noun plural (the troops) but not as a noun singular (one doesn’t refer to individual troops as “a troop”) but there is the noun singular “trooper”.

Military and Para-military use

The troop as a military sub-unit continues to exist in some armed and police forces but tends now not in general to be part of military structures.  It was originally a tactical group, a small formation of cavalry, part of a squadron deployed on a battlefield for a specific action and it’s in that sense that use persists, a troop sometimes an alternative term for an infantry section or platoon.  There are historic exceptions in the US Cavalry and the British Army where a troop can be an infantry company or artillery battery.

The Australian Army uses the term, a troop a platoon sized element and the general term for army personnel (and literally the private soldier) is trooper.  Technically, it’s only the Special Air Service Regiment (SASR; special forces) of the Royal Australian Infantry Corps which uses troop to refer to its platoon size formations but it remains common slang.  As a general principle, where used in the military, a troop tends to be platoon-sized except in the US Cavalry, where it’s equivalent to a company (ie three to four platoons) and, when combined, these form a regiment, the change in nomenclature dating from 1883.

Para-military use: A troop of girl scouts (or guides) selling biscuits (or cookies).

In civilian use, many US police forces use troop and trooper because they modelled their command structures along military lines, the same reason the Boy Scouts and Girl Scouts adopted the form although, in these less robust times, it’s become common, especially with the latter, to replace troop with company, the now less-fashionable military connection being less overt.

One exception was the Salvation Army which never used troop, either as an organizational unit or in the collective to describe its members although, it was common to refer to them as "Christian soldiers".  They did use military ranks and some of the structural terms (such as corps and division) were adopted but never troop.