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An officer is a person who holds a position of authority as a member of an armed force or uniformed service. Broadly speaking, "officer" means a commissioned officer, a
non-commissioned officer A non-commissioned officer (NCO) is a military officer who has not pursued a commission. Non-commissioned officers usually earn their position of authority by promotion through the enlisted ranks. (Non-officers, which includes most or all enli ...
, or a warrant officer. However, absent contextual qualification, the term typically refers only to a force's ''commissioned officers'', the more senior members who derive their authority from a commission from the
head of state A head of state (or chief of state) is the public persona who officially embodies a state (polity), state#Foakes, Foakes, pp. 110–11 " he head of statebeing an embodiment of the State itself or representatitve of its international p ...
.


Numbers

The proportion of officers varies greatly. Commissioned officers typically make up between an eighth and a fifth of modern armed forces personnel. In 2013, officers were the senior 17% of the British armed forces, and the senior 13.7% of the French armed forces. In 2012, officers made up about 18% of the German armed forces, and about 17.2% of the United States armed forces. Historically, however, armed forces have generally had much lower proportions of officers. During the First World War, fewer than 5% of British soldiers were officers (partly because World War One junior officers suffered high casualty rates). In the early twentieth century, the Spanish army had the highest proportion of officers of any European army, at 12.5%, which was at that time considered unreasonably high by many Spanish and foreign observers. Within a nation's armed forces, armies (which are usually larger) tend to have a lower ''proportion'' of officers, but a higher ''total'' number of officers, while navies and air forces have higher ''proportions'' of officers, especially since military aircraft are flown by officers and naval ships and submarines are commanded by officers. For example, 13.9% of British Army personnel and 22.2% of the RAF personnel were officers in 2013, but the British Army had a larger total number of officers.


Commission sources and training

Commissioned officers generally receive training as leadership and management generalists, in addition to training relating to their specific military occupational specialty or function in the military. Many militaries such as the United States typically require university degrees as a prerequisite for commissioning, even when accessed from the enlisted ranks. Others, including the Australian Defence Force, the British Armed Forces (HMAF), the Nepali Army, the Pakistan Armed Forces (PAF), the Swiss Armed Forces, the Singapore Armed Forces, the
Israel Defense Forces The Israel Defense Forces (IDF; he, צְבָא הַהֲגָנָה לְיִשְׂרָאֵל , ), alternatively referred to by the Hebrew-language acronym (), is the national military of the Israel, State of Israel. It consists of three servic ...
(IDF), the Swedish Armed Forces, and the New Zealand Defence Force, are different in not requiring a university degree for commissioning, although a significant number of officers in these countries are graduates. In the Israel Defense Forces, a university degree is a requirement for an officer to advance to the rank of
lieutenant colonel Lieutenant colonel ( , ) is a rank of commissioned officers in the armies, most marine forces and some air forces of the world, above a major and below a colonel. Several police forces in the United States use the rank of lieutenant colonel ...
and beyond. The IDF often sponsors the studies for its officers in the rank
major Major (commandant in certain jurisdictions) is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world. When used unhyphenated and in conjunction with no other indicators ...
, while aircrew and
naval A navy, naval force, or maritime force is the branch of a nation's armed forces principally designated for naval warfare, naval and amphibious warfare; namely, lake-borne, riverine, littoral zone, littoral, or ocean-borne combat operations and ...
officers obtain academic degrees as a part of their training programmes.


United Kingdom

In the United Kingdom, there are three routes of entry for British Armed Forces officers. The first, and primary route are those who receive their commission directly into the officer grades following completion at their relevant military academy. In the second method, an individual may gain their commission after first enlisting and serving in the junior ranks, and typically reaching one of the senior non-commissioned officer ranks (which start at
sergeant Sergeant (abbreviated to Sgt. and capitalized when used as a named person's title) is a rank in many uniformed organizations, principally military and policing forces. The alternative spelling, ''serjeant'', is used in The Rifles and other uni ...
(Sgt), and above), as what are known as direct entry or DE officers (and are typically and informally known as an ex-ranker). The third route is similar to the second, in that they convert from an enlisted to a commission; but these are only taken from the highest ranks of SNCOs, and are known as 'late entry' or LE officers. LE officers, whilst holding the same King's commission, generally work in different roles from the DE officers. In 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 ...
, a number of warrant officer class 1s are commissioned as LE officers. 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 ...
, commissioning for DE officers occurs after a 44-week course at the
Royal Military Academy Sandhurst The Royal Military Academy Sandhurst (RMAS or RMA Sandhurst), commonly known simply as Sandhurst, is one of several military academies of the United Kingdom and is the British Army's initial officer training centre. It is located in the town of ...
for regular officers or the Army Reserve Commissioning Course, which consists of four two-week modules (A-D) for Army Reserve officers. The first two modules may be undertaken over a year for each module at an Officers' Training Corps; the last two must be undertaken at Sandhurst. For
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...
and Royal Air Force officer candidates, a 30-week period at Britannia Royal Naval College or a 24-week period at RAF College Cranwell, respectively.
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 ...
officers receive their training in the Command Wing of the Commando Training Centre Royal Marines during a gruelling 15-month course. The courses consist of not only tactical and combat training, but also leadership, management, etiquette, and international affairs training. Until the Cardwell Reforms of 1871, commissions 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 ...
were purchased by officers. The Royal Navy, however, operated on a more meritocratic, or at least socially mobile, basis.


United States


Types of officers

Commissioned officers exist in all eight uniformed services of the United States. All six armed forces of the United States have both commissioned officer and non-commissioned officer (NCO) ranks, and all of them except the United States Air Force and United States Space Force have warrant officer ranks. The two noncombatant uniformed services, the United States Public Health Service Commissioned Corps and the National Oceanic and Atmospheric Administration Commissioned Officer Corps (NOAA Corps), have only commissioned officers, with no warrant officer or enlisted personnel. Commissioned officers are considered
commanding officers The commanding officer (CO) or sometimes, if the incumbent is a general officer, commanding general (CG), is the officer in command of a military unit. The commanding officer has ultimate authority over the unit, and is usually given wide latitu ...
under presidential authority. A ''superior officer'' is an officer with a higher rank than another officer, who is a ''subordinate officer'' relative to the superior. NCOs, including U.S. Navy and U.S. Coast Guard petty officers and chief petty officers, in positions of authority can be said to have control or charge rather than command ''per se'' (although the word "command" is often used unofficially to describe any use of authority). These enlisted naval personnel with authority are officially referred to as officers-in-charge rather than commanding officers.


Commissioning programs

Commissioned officers in the Armed Forces of the United States come from a variety of accessions sources:


= Service Academies

= * United States Military Academy (USMA) (commissions
second lieutenant Second lieutenant is a junior commissioned officer military rank in many armed forces, comparable to NATO OF-1 rank. Australia The rank of second lieutenant existed in the military forces of the Australian colonies and Australian Army until ...
s in the U.S. Army) * United States Naval Academy (USNA) (commissions both ensigns in the U.S. Navy and 2nd lieutenants in the
U.S. Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through comb ...
) * United States Air Force Academy (USAFA) (commissions second lieutenants in the U.S. Air Force and U.S. Space Force) * United States Coast Guard Academy (USCGA) (commissions ensigns in the U.S. Coast Guard and provides Basic Officer Training Classes for NOAA Corps officer candidates) * United States Merchant Marine Academy (USMMA) (commissions ensigns in the U.S. Navy Reserve; graduates may apply for active or reserve duty in any of the eight uniformed services of the United States) Graduates of the United States service academies attend their institutions for no less than four years and, with the exception of the USMMA, are granted active duty regular commissions immediately upon completion of their training. They make up approximately 20% of the U.S. armed forces officer corps.


= Reserve Officers' Training Corps (ROTC)

= Officers in the U.S. Armed Forces may also be commissioned through the Reserve Officers' Training Corps (ROTC). * Army ROTC * Naval ROTC (commissions both ensigns in the U.S. Navy and second lieutenants in the U.S. Marine Corps) * Air Force ROTC (commissions 2nd lieutenants in the U.S. Air Force and U.S. Space Force) ROTC is composed of small training programs at several hundred American colleges and universities. There is no Marine Corps ROTC program ''per se'', but there exists a Marine Corps Option for selected midshipmen in the Naval ROTC programs at civilian colleges and universities or at non-Federal military colleges such as The Citadel and the Virginia Military Institute. The Coast Guard has no ROTC program, but does have a Direct Commission Selected School Program for military colleges such as The Citadel and VMI. Army ROTC graduates of the United States four junior military colleges can also be commissioned in the U.S. Army with only a 2-year associate degree through its Early Commissioning Program, conditioned on subsequently completing a 4-year bachelor's degree from an accredited 4-year institution within a defined time.


= Federal Officer Candidate Schools

= College-graduate candidates (initial or prior-service) may also be commissioned in the U.S. Uniformed Services via Officer Candidate School, Officer Training School, or other programs: * Army OCS * Navy OCS * Marine Corps OCS * Air Force Officer Training School (OTS) * Coast Guard OCS * USPHS Officer Basic Course (OBC) * NOAA Corps Basic Officer Training Class (BOTC)


= Marine Corps Platoon Leaders Class (PLC)

= A smaller number of Marine Corps officers may be commissioned via the Marine Corps Platoon Leaders Class (PLC) program during summers while attending college. PLC is a sub-element of Marine Corps OCS and college and university students enrolled in PLC undergo military training at Marine Corps Officer Candidate School in two segments: the first of six weeks between their sophomore and junior year and the second of seven weeks between their junior and senior year. There is no routine military training during the academic year for PLC students as is the case for ROTC cadets and midshipmen, but PLC students are routinely visited and their physical fitness periodically tested by Marine Corps Officer Selection Officers (OSOs) from the nearest Marine Corps officer recruiting activity. PLC students are placed in one of three general tracks: PLC-Air for prospective Marine
Naval Aviator Naval aviation is the application of military air power by navies, whether from warships that embark aircraft, or land bases. Naval aviation is typically projected to a position nearer the target by way of an aircraft carrier. Carrier-based a ...
s and Marine Naval Flight Officers; PLC-Ground for prospective Marine infantry, armor, artillery and combat support officers; and PLC-Law, for prospective Marine Corps judge advocate general officers. Upon graduation from college, PLC students are commissioned as active duty 2nd lieutenants in the U.S. Marine Corps.


= National Guard OCS

= In addition to ROTC,
Army National Guard The Army National Guard (ARNG), in conjunction with the Air National Guard, is an organized Militia (United States), militia force and a Reserve components of the United States Armed Forces, federal military reserve force of the United States A ...
(ARNG) officers may also be commissioned through state-based Officer Candidate Schools. These schools train and commission college graduates, prior-servicemembers, and enlisted Guard soldiers specifically for the National Guard. Air National Guard officers without prior active duty commissioned service attend the same active duty Officer Training School (OTS) at Maxwell AFB, Alabama as do prospective active duty USAF officers and prospective direct entry Air Force Reserve officers not commissioned via USAFA or AFROTC.


= Other commissioning programs

= In the United States Armed Forces, enlisted military personnel without a four-year university degree at the bachelor's level can, under certain circumstances, also be commissioned in the Navy, Marine Corps and Coast Guard Limited Duty Officer (LDO) program. Officers in this category constitute less than 2% of all officers in those services. Another category in the Army, Navy, Marine Corps and Coast Guard are Warrant Officers / Chief Warrant Officers (WO/CWO). These are specialist officers who do not require a bachelor's degree and are exclusively selected from experienced mid to senior level enlisted ranks (e.g., E-5 with 8 years time in service for the Marine Corps, E-7 and above for Navy and Coast Guard). The rank of Warrant Officer (WO1, also known as W-1) is an appointed rank by warrant from the respective branch secretary until promotion to Chief Warrant Officer (CWO2, also known as W-2) by presidential commission, and are entitled to the same customs and courtesies as commissioned officers. Their difference from line and staff corps officers is their focus as single specialty/military occupational field subject matter experts, though under certain circumstances they can fill command positions. The Air Force has discontinued its warrant officer program and has no LDO program. Similarly, the Space Force was created with no warrant officer or LDO programs, Both services require all commissioned officers to possess a
bachelor's degree A bachelor's degree (from Middle Latin ''baccalaureus'') or baccalaureate (from Modern Latin ''baccalaureatus'') is an undergraduate academic degree awarded by colleges and universities upon completion of a course of study lasting three to six ...
prior to commissioning. The U.S Public Health Service Commissioned Corps and NOAA Corps have no warrant officers or enlisted personnel, and all personnel must enter those services via commissioning.


Direct commission

Direct commission is another route to becoming a commissioned officer. Credentialed civilian professionals such as scientists, pharmacists, physicians, nurses, clergy, and attorneys are directly commissioned upon entry into the military or another federal uniformed service. However, these officers generally do not exercise command authority outside of their job-specific support corps (e.g., U.S. Army Medical Corps; U.S. Navy Judge Advocate General's Corps, etc.). The United States Public Health Service Commissioned Corps and the National Oceanic and Atmospheric Administration Commissioned Officer Corps exclusively use direct commission to commission their officers. During the U.S. participation in
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...
(1941–1945), industrial management expert civilians also received direct commissions to stand up materiel production for the U.S. armed forces.


Discontinued U.S. officer commissioning programs

Although significantly represented in the retired senior commissioned officer ranks of the U.S. Navy, a much smaller cohort of current active duty and active Reserve officers (all of the latter being captains or flag officers as of 2017) were commissioned via the Navy's since discontinued Aviation Officer Candidate School (AOCS) program for college graduates. AOCS focused on producing line officers for Naval Aviation who would become
Naval Aviator Naval aviation is the application of military air power by navies, whether from warships that embark aircraft, or land bases. Naval aviation is typically projected to a position nearer the target by way of an aircraft carrier. Carrier-based a ...
s and Naval Flight Officers upon completion of flight training, followed by a smaller cohort who would become Naval Air Intelligence Officers and Aviation Maintenance Duty Officers. Designated as Aviation Officer Candidates (AOCs), individuals in the AOCS program were primarily non-prior military service college graduates, augmented by a smaller cohort of college-degreed active duty, reserve or former enlisted personnel. In the late 1970s, a number of Air Force ROTC cadets and graduates originally slated for undergraduate pilot training (UPT) or undergraduate navigator training (UNT) lost their flight training slots either immediately prior to or subsequent to graduation, but prior to going on active duty, due to a post-Vietnam reduction in force (RIF) that reduced the number of flying slots for AFROTC graduates by approximately 75% in order to retain flight training slots for USAFA cadets and graduates during the same time period. Many of these individuals, at the time all male, resigned their inactive USAF commissions and also attended AOCS for follow-on naval flight training. AOCs were active duty personnel in pay grade E-5 (unless having previously held a higher Active Duty or Reserve enlisted grade in any of the U.S. armed forces) for the duration of their 14-week program. Upon graduation, they were commissioned as ensigns in the then- U.S. Naval Reserve on active duty, with the option to augment their commissions to the Regular Navy after 4 to 6 years of commissioned service. AOCS also included the embedded Aviation Reserve Officer Candidate (AVROC) and Naval Aviation Cadet (NAVCAD) programs. AVROC was composed of college students who would attend officer training in two segments similar to Marine Corps PLC, but would do so between their junior and senior year and again following college graduation, receiving their commission upon completion of the second segment. The NAVCAD program was in operation from 1935 through 1968 and again from 1986 through 1993. NAVCADs were enlisted or civilian personnel who had completed two years of college, but lacked bachelor's degrees. NAVCADs would complete the entire AOCS program, but would not be commissioned until completion of flight training and receiving their wings. After their initial operational tour, they could be assigned to a college or university full-time for no more than two years in order to complete their bachelor's degree. AVROC and NAVCAD were discontinued when AOCS was merged into OCS in the mid-1990s. Similar to NAVCAD was the Marine Aviation Cadet (MarCad) program, created in July 1959 to access enlisted Marines and civilians with at least two years of college. Many, but not all, MarCads attended enlisted "boot camp" at Marine Corps Recruit Depot Parris Island or Marine Corps Recruit Depot San Diego, as well as the School of Infantry, before entering naval flight training. MarCads would then complete their entire flight training syllabus as cadets. Graduates were designated Naval Aviators and commissioned as 2nd Lieutenants on active duty in the Marine Corps Reserve. They would then report to The Basic School (TBS) at Marine Corps Base Quantico prior to reporting to a Replacement Air Group (RAG)/Fleet Replacement Squadron (FRS) and then to operational Fleet Marine Force (FMF) squadrons. Like their NAVCAD graduate counterparts, officers commissioned via MarCad had the option to augment to the regular Marine Corps following four to six years of commissioned service. The MarCad program was closed to new applicants in 1967 and the last trainee graduated in 1968. Another discontinued commissioning program was the Air Force's Aviation Cadet program. Originally created by the U.S. Army Signal Corps in 1907 to train pilots for its then-fledgling aviation program, it was later used by the subsequent
U.S. Army Air Service The United States Army Air Service (USAAS)Craven and Cate Vol. 1, p. 9 (also known as the ''"Air Service"'', ''"U.S. Air Service"'' and before its legislative establishment in 1920, the ''"Air Service, United States Army"'') was the aerial warf ...
, U.S. Army Air Corps and
U.S. Army Air Forces The United States Army Air Forces (USAAF or AAF) was the major land-based aerial warfare service component of the United States Army and ''de facto'' aerial warfare service branch of the United States during and immediately after World War II ...
to train pilots, navigators, bombardiers and observers through World War I, the interwar period, World War II, and the immediate postwar period between September 1945 and September 1947. With the establishment of the U.S. Air Force as an independent service in September 1947, it then became a source for USAF pilots and navigators. Cadets had to be between the ages of 19 and 25 and possess either at least two years of college/university level education or three years of a scientific or technical education. In its final iteration, cadets received the pay of enlisted pay grade E-5 and were required to complete all pre-commissioning training and flight training before receiving their wings as pilots or navigators and their commissions as 2nd lieutenants on active duty in the U.S. Air Force Reserve on the same day. Aviation cadets were later offered the opportunity to apply for a commission in the regular Air Force and attend a college or university to complete a 4-year degree. As the Air Force's AFROTC and OTS programs began to grow, and with the Air Force's desire for a 100% college-degreed officer corps, the Aviation Cadet program was slowly phased out. The last Aviation Cadet Pilot graduated in October 1961 and the last Aviation Cadet Navigators in 1965. By the 1990s, the last of these officers had retired from the active duty regular Air Force, the Air Force Reserve and the Air National Guard.


Commonwealth of Nations

In countries whose ranking systems are based upon the models of the British Armed Forces (BAF), officers from the rank of
second lieutenant Second lieutenant is a junior commissioned officer military rank in many armed forces, comparable to NATO OF-1 rank. Australia The rank of second lieutenant existed in the military forces of the Australian colonies and Australian Army until ...
(army),
sub-lieutenant Sub-lieutenant is usually a junior officer rank, used in armies, navies and air forces. In most armies, sub-lieutenant is the lowest officer rank. However, in Brazil, it is the highest non-commissioned rank, and in Spain, it is the second high ...
(navy) or
pilot officer Pilot officer (Plt Off officially in the RAF; in the RAAF and RNZAF; formerly P/O in all services, and still often used in the RAF) is the lowest commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countri ...
(air force) to the rank of general, admiral or air chief marshal respectively, are holders of a commission granted to them by the appropriate awarding authority. In United Kingdom (UK) and other Commonwealth realms, the awarding authority is the
monarch A monarch is a head of stateWebster's II New College DictionarMonarch Houghton Mifflin. Boston. 2001. p. 707. Life tenure, for life or until abdication, and therefore the head of state of a monarchy. A monarch may exercise the highest authority ...
(or a
governor general Governor-general (plural ''governors-general''), or governor general (plural ''governors general''), is the title of an office-holder. In the context of governors-general and former British colonies, governors-general are appointed as viceroy ...
representing the monarch) as
head of state A head of state (or chief of state) is the public persona who officially embodies a state (polity), state#Foakes, Foakes, pp. 110–11 " he head of statebeing an embodiment of the State itself or representatitve of its international p ...
. The head of state often is granted the power to award commissions, or has commissions awarded in his or her name. In Commonwealth nations, commissioned officers are given commissioning scrolls (also known as commissioning scripts) signed by the
sovereign ''Sovereign'' is a title which can be applied to the highest leader in various categories. The word is borrowed from Old French , which is ultimately derived from the Latin , meaning 'above'. The roles of a sovereign vary from monarch, ruler or ...
or the governor general acting on the monarch's behalf. Upon receipt, this is an official legal document that binds the mentioned officer to the commitment stated on the scroll. Non-commissioned members rise from the lowest ranks in most nations. Education standards for non-commissioned members are typically lower than for officers (with the exception of specialized military and highly-technical trades; such as aircraft, weapons or electronics engineers). Enlisted members only receive leadership training after they are
promoted Promotion may refer to: Marketing * Promotion (marketing), one of the four marketing mix elements, comprising any type of marketing communication used to inform or persuade target audiences of the relative merits of a product, service, brand or i ...
to positions of responsibility, or as a prerequisite for such. In the past (and in some countries today but to a lesser extent), non-commissioned members were almost exclusively conscripts, whereas officers were volunteers. In certain Commonwealth nations, commissioned officers are made commissioners of oaths by virtue of their office and can thus administer oaths or take affidavits or declarations, limited in certain cases by rank or by appointment, and generally limited to activities or personnel related to their employment.


Warrant officers

In some branches of many armed forces, there exists a third grade of officer known as a warrant officer. In the armed forces of the United States, warrant officers are initially appointed by the Secretary of the service and then commissioned by the President of the United States upon promotion to chief warrant officer. In many other countries (as in the armed forces of the Commonwealth nations), warrant officers often fill the role of very senior non-commissioned officers. Their position is affirmed by warrant from the bureaucracy directing the force—for example, the position of regimental sergeant major in regiments of the British Army is held by a warrant officer appointed by the British government. In the U.S. military, a warrant officer is a technically-focused subject matter expert, such as helicopter pilot or information technology specialist. There are no warrant officers in the U.S. Air Force and the U.S. Space Force; the USAF last warrant officers retired in the 1980s, and ranks became dormant. The USSF has not established any warrant officer ranks. All other U.S. Armed Forces have warrant officers, with warrant accession programs unique to each individual service's needs. Although Warrant Officers normally have more years in service than regular commissioned officers, they are below regular commissioned officers in the rank hierarchy. In certain instances, commissioned chief warrant officers can command units.


Non-commissioned officers

A non-commissioned officer (NCO) is an enlisted member of the armed forces holding a position of some degree of authority who has (usually) obtained it by advancement from within the non-commissioned ranks. Officers who are ''non-commissioned'' usually receive management and leadership training, but their function is to serve as supervisors within their area of trade specialty. Senior NCOs serve as advisers and leaders from the duty section level to the highest levels of the armed forces establishment, while lower NCO grades are not yet considered management specialists. The duties of an NCO can vary greatly in scope, so that an NCO in one country may hold almost no authority, while others such as the United States and the United Kingdom consider their NCOs to be "the backbone of the military" due to carrying out the orders of those officers appointed over them. In most maritime forces (navies and coast guards), the NCO ranks are called petty officers and chief petty officers while enlisted ranks prior to attaining NCO/petty officer status typically known as seaman, airman, fireman, or some derivation thereof. In most traditional infantry, marine and air forces, the NCO ranks are known as
corporal Corporal is a military rank in use in some form by many militaries and by some police forces or other uniformed organizations. The word is derived from the medieval Italian phrase ("head of a body"). The rank is usually the lowest ranking non- ...
s and
sergeant Sergeant (abbreviated to Sgt. and capitalized when used as a named person's title) is a rank in many uniformed organizations, principally military and policing forces. The alternative spelling, ''serjeant'', is used in The Rifles and other uni ...
s, with non-NCO enlisted ranks referred to as privates and airmen. However, some countries use the term ''commission'' to describe the promotion of enlisted soldiers, especially in countries with mandatory service in the armed forces. These countries refer to their NCOs as professional soldiers, rather than as officers.


Officer ranks and accommodation

Officers in nearly every country of the world are segregated from the enlisted soldiers, sailors, airmen, marines and coast guardsmen in many facets of military life. Facilities accommodating needs such as messing (i.e., mess hall or mess deck versus officers mess or wardroom), separate billeting/berthing, domiciles, and general
recreation Recreation is an activity of leisure, leisure being discretionary time. The "need to do something for recreation" is an essential element of human biology and psychology. Recreational activities are often done for enjoyment, amusement, or pleasur ...
facilities (officer clubs versus NCO Clubs and CPO Clubs versus enlisted clubs) are separated between officers and enlisted personnel. This class system, historically correlated to
socioeconomic status Socioeconomic status (SES) is an economic and sociological combined total measure of a person's work experience and of an individual's or family's economic access to resources and social position in relation to others. When analyzing a family's ...
, is focused on discouraging fraternization and encouraging professional and ethical relations between officers and enlisted military personnel. Officers do not routinely perform physical labor; they typically supervise enlisted personnel doing so, either directly or via non-commissioned officers. Commissioned officers will and do perform physical labor when operationally required to do so, e.g., in combat. However, it would be very unusual for an officer to perform physical labor in garrison, at home station or in homeport. Article 49 of the Third Geneva Convention stipulates that even as
prisoners of war A prisoner of war (POW) is a person who is held Captivity, captive by a belligerent power during or immediately after an armed conflict. The earliest recorded usage of the phrase "prisoner of war" dates back to 1610. Belligerents hold priso ...
, commissioned officers cannot be compelled to work, and NCOs can only be given supervisory work.


See also

* Brevet (military) * Exchange officer *
Foreign Service Officer A Foreign Service Officer (FSO) is a commissioned member of the United States Foreign Service. Foreign Service Officers formulate and implement the foreign policy of the United States. FSOs spend most of their careers overseas as members of U ...
* List of comparative military ranks * Mustang (military officer) * Officer (disambiguation) * Roving commission * STA-21 * Staff officer


References


External links


U.S. DoD Officer Rank Insignia
{{DEFAULTSORT:Officer (Armed Forces) Military ranks Command and control