Officer (armed forces)

officercommissionedofficersmilitary officercommissioned officercommissionnaval officerarmy officercommissioned officersmilitary officers
An officer is a member of an armed forces or uniformed service who holds a position of authority.wikipedia
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Non-commissioned officer

NCONCOsnon-commissioned officers
In its broadest sense, the term "officer" refers to commissioned officers, non-commissioned officers, and warrant officers.
A noncommissioned officer (NCO) is a military officer who has not earned a commission.

Warrant officer

warrant officersWarrant Officer Class 2Warrant Officer Class 1
In its broadest sense, the term "officer" refers to commissioned officers, non-commissioned officers, and warrant officers.
A warrant officer (WO) is an officer in a military organisation who is designated an officer by a warrant, as distinguished from a commissioned officer who is designated an officer by a commission, and a non-commissioned officer who is designated an officer, often by virtue of seniority.

Military

armed forcesdefensedefence
An officer is a member of an armed forces or uniformed service who holds a position of authority.
The military organization is characterized by a strict command hierarchy divided by military rank, with ranks normally grouped (in descending order of authority) as officers (e.g. Colonel), non-commissioned officers (e.g. Sergeant), and personnel at the lowest rank (e.g. Private Soldier).

Major

chef de bataillonMaj.Maj
The IDF often sponsors the studies for its officers in the rank major, while aircrew and naval officers obtain academic degrees as a part of their training programmes.
Major is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world.

Lieutenant colonel

Lieutenant-ColonelLt. Col.Lt. Colonel
In the Israel Defense Forces, a university degree is a requirement for an officer to advance to the rank of lieutenant colonel and beyond.
Lieutenant colonel (pronounced Lef-ten-ent Kernel (UK & Commonwealth) or Loo-ten-ent Kernel (US)) is a rank of commissioned officer in the armies, most marine forces and some air forces of the world, above a major and below a colonel.

Royal Military Academy Sandhurst

SandhurstRoyal Military Academy, SandhurstRoyal Military College, Sandhurst
In the British Army, commissioning for DE officers occurs after a 44-week course at the Royal Military Academy Sandhurst for regular officers or the Army Reserve Commissioning Course, which consists of four two-week modules (A-D) for Army Reserve officers.
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.

Royal Air Force College Cranwell

RAF College CranwellRoyal Air Force CollegeRAF College, Cranwell
For Royal Navy 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.
The Royal Air Force College (RAFC) is the Royal Air Force training and education academy which provides initial training to all RAF personnel who are preparing to be commissioned officers.

Head of state

heads of stateChief of Stateheads of states
However, when used without further detail, the term almost always refers to only commissioned officers, the more senior portion of a force who derive their authority from a commission from the head of state.
The head of state usually appoints most or all the key officials in the government, including the head of government and other cabinet ministers, key judicial figures; and all major office holders in the civil service, foreign service and commissioned officers in the military.

Pakistan Armed Forces

Pakistani militarymilitaryPakistani Armed Forces
Others, including the Australian Defence Force, the British Armed Forces (BAF), Nepal Army, the Pakistani Armed Forces (PAF), the Swiss Armed Forces, the Singapore Armed Forces, the Israel Defense Forces (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.
Members of the Pakistani military hold a rank, either that of officer or enlisted, and can be promoted.

Singapore Armed Forces

SAFSingaporeSingapore Armed Forces (SAF)
Others, including the Australian Defence Force, the British Armed Forces (BAF), Nepal Army, the Pakistani Armed Forces (PAF), the Swiss Armed Forces, the Singapore Armed Forces, the Israel Defense Forces (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.
NS was initially three years for commissioned officers and two years for other ranks, but it was later revised to two years and six months for soldiers with the rank of Corporal and above, and two years for those with the rank of Lance Corporal or lower.

Purchase of commissions in the British Army

purchasepurchasedpurchased a commission
Until the Cardwell Reforms of 1871, commissions in the British Army were purchased by officers.
The purchase of officer commissions in the British Army was the practice of paying money to be made an officer in the cavalry and infantry regiments of the English and later British Army.

Army Reserve (United Kingdom)

Territorial ArmyArmy ReserveTerritorial
In the British Army, commissioning for DE officers occurs after a 44-week course at the Royal Military Academy Sandhurst for regular officers or the Army Reserve Commissioning Course, which consists of four two-week modules (A-D) for Army Reserve officers.
Each regiment or battalion had a Regular Army officer attached as full-time adjutant.

United States service academies

service academiesservice academyfederal service academies
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.
The United States service academies, also known as the United States military academies, are federal academies for the undergraduate education and training of commissioned officers for the United States Armed Forces.

United States Military Academy

West PointU.S. Military AcademyArmy
Most graduates are commissioned as second lieutenants in the Army.

Sergeant

Detective SergeantSenior SergeantSgt
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 (Sgt), and above), as what are known as 'direct entry' or DE officers (and are typically and informally known as an 'ex-ranker').
In most non-naval military or paramilitary organizations, the various grades of sergeant are non-commissioned officers (NCOs) ranking above privates and corporals, and below warrant officers and commissioned officers.

United States Coast Guard Academy

U.S. Coast Guard AcademyCoast Guard AcademyCoast Guard
Founded in 1876, it is the second smallest of the five federal service academies and provides education to future Coast Guard officers in one of nine major fields of study.

Israel Defense Forces

IDFIsraeli Defense ForcesIsraeli Army
Others, including the Australian Defence Force, the British Armed Forces (BAF), Nepal Army, the Pakistani Armed Forces (PAF), the Swiss Armed Forces, the Singapore Armed Forces, the Israel Defense Forces (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.

United States Naval Academy

U.S. Naval AcademyNaval AcademyUS Naval Academy
Graduates are usually commissioned as ensigns in the Navy or second lieutenants in the Marine Corps, but a small number can also be cross-commissioned as officers in other U.S. services, and the services of allied nations.

Reserve Officers' Training Corps

ROTCReserve Officer Training CorpsReserve Officers Training Corps
Officers in the U.S. Armed Forces may also be commissioned through the Reserve Officers' Training Corps (ROTC).
The Reserve Officers' Training Corps (ROTC) is a group of college and university-based officer training programs for training commissioned officers of the United States Armed Forces.

Command hierarchy

chain of commandcommand structurechains of command
Commissioned officers are considered commanding officers under presidential authority.
Orders are transmitted down the chain of command, from a responsible superior, such as a commissioned officer, to lower-ranked subordinate(s) who either execute the order personally or transmit it down the chain as appropriate, until it is received by those expected to execute it.

Virginia Military Institute

VMIVirginia MilitaryThe Virginia Military Institute
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.
All cadets must participate in the Reserve Officers' Training Corps (ROTC) of the United States Armed Forces programs, but are afforded the flexibility of pursuing civilian endeavors or accepting an officer's commission in any of the active or reserve components of any of the U.S. military branches upon graduation.

Naval Reserve Officers Training Corps

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

Officer Candidate School (United States Navy)

Officer Candidate SchoolAviation Officer Candidate SchoolNavy Officer Candidate School
The United States Navy's Officer Candidate School (abbreviated OCS) provides initial training for officers of the line and select operational staff corps communities (supply and CEC) in the United States Navy.

Officer Candidate School (United States Army)

Officer Candidate SchoolOCSArmy Officer Candidate School
The United States Army's Officer Candidate School (OCS), located at Fort Benning, Georgia, trains, assesses, and evaluates potential commissioned officers in the U.S. Army, U.S. Army Reserve, and Army National Guard.

Early Commissioning Program

Early Commissioning Program scholarships
Army ROTC graduates of junior military colleges can also be commissioned with 2-year associate degrees through its Early Commissioning Program, conditioned on subsequently completing a 4-year bachelor's degree within a defined time.
Early Commissioning Program (ECP) is a U.S. Army ROTC program that allows graduates of one of the nation's four Military Junior Colleges (MJC) to become commissioned officers in the reserve components (National Guard or Reserve) in two years, instead of the usual four.