|Comparative military ranks in English|
Junior officer, company officer or company grade officer refers to the lowest operational commissioned officer category of ranks in a military or paramilitary organization, ranking above non-commissioned officers and below senior officers.
The terms company officer or company-grade officer are used more in the Army, Air Force, or Marine Corps as the ranks of captain, lieutenant grades and other subaltern ranks originated from the officers in command of a company or equivalent (cavalry squadron/troop and artillery battery).
In many armed forces, a junior officer is specifically a commissioned officer holding rank equivalent to a naval lieutenant, an army captain or a flight lieutenant or below.
In the United States Armed Forces, the term junior officer is used by the Navy and the Coast Guard for officers in the ranks of ensign (O-1), lieutenant, junior grade (O-2), lieutenant (O-3),and lieutenant commander (O-4).
Warrant officer (WO) is a rank or category of ranks in the armed forces of many countries. Depending on the country, service, or historical context, warrant officers are sometimes classified as the most junior of the commissioned ranks, the most senior of the non-commissioned officer (NCO) ranks, or in a separate category of their own. Warrant officer ranks are especially prominent in the militaries of Commonwealth nations and the United States.
Military ranks in the world are a system of hierarchical relationships in armed forces, police, intelligence agencies or other institutions organized along military lines. The military rank system defines dominance, authority, and responsibility in a military hierarchy. It incorporates the principles of exercising power and authority into the military chain of command – the succession of commanders superior to subordinates through which command is exercised. The military chain of command constructs an important component for organized collective action.
Regimental sergeant major (RSM) is an appointment that may be held by warrant officers class 1 (WO1) in the British Army, the British Royal Marines and in the armies of many Commonwealth and former Commonwealth nations, including Australia, Kenya and New Zealand. It is also an appointment that may be held by chief warrant officers (CWO) in the Canadian Forces and warrant officers of any grade in the Singapore Armed Forces, and is a rank in itself in the Irish Defence Forces and formerly in the British Army, Royal Marines and United States Army. Only one warrant officer holds the appointment of RSM in a regiment or battalion, making him the senior warrant officer; in a unit with more than one WO1, the RSM is considered to be "first amongst equals". The RSM is primarily responsible for assisting their commander for maintaining standards and discipline amongst the non-commissioned members and acts as a parental figure to their subordinates.
A lieutenant is a junior commissioned officer in the armed forces, fire services, police and other organizations of many nations.
A non-commissioned officer (NCO) is a military officer who has not earned a commission. Non-commissioned officers usually obtain their position of authority by promotion through the enlisted ranks. In contrast, commissioned officers usually enter directly from a military academy, Officer Candidate School (OCS), or Officer Training School (OTS) after receiving a post-secondary degree.
Brigadier is a military rank, the seniority of which depends on the country. In some countries, it is a senior rank above colonel, equivalent to a brigadier general or commodore, typically commanding a brigade of several thousand soldiers. In other countries, it is a non-commissioned rank.
Second lieutenant is a junior commissioned officer military rank in many armed forces, comparable to NATO OF-1a rank.
Sergeant is a rank in many uniformed organizations, principally military and policing forces. The alternative spelling, serjeant, is used in The Rifles and other units that draw their heritage from the British light infantry. Its origin is the Latin serviens, 'one who serves', through the French term sergent.
Commander is a common naval officer rank. Commander is also used as a rank or title in other formal organizations, including several police forces. In several countries this naval rank is termed frigate captain.
Ensign is a junior rank of a commissioned officer in the armed forces of some countries, normally in the infantry or navy. As the junior officer in an infantry regiment was traditionally the carrier of the ensign flag, the rank acquired the name. This rank has generally been replaced in army ranks by second lieutenant. Ensigns were generally the lowest ranking commissioned officer, except where the rank of subaltern existed. In contrast, the Arab rank of ensign, لواء, liwa', derives from the command of units with an ensign, not the carrier of such a unit's ensign, and is today the equivalent of a major general.
Navies have military rank systems that often are quite different from those of armies or air forces. Sometimes, services that are considered parts of the navy – marine or amphibious corps – use the army-style ranks instead, while the ranks listed here are reserved for fleets.
Armies have military rank systems that are often used by other military services such as air forces or marines.
Many air forces use a rank system similar to those of armies. However, the RAF and the air forces of many Commonwealth countries, or those formerly under a British influence, use a different set of ranks loosely based on naval equivalents; Lieutenant, Commander, Captain and Commodore are prefixed for air force use with Flight, Wing, Group and Air, respectively.
A field officer, field-grade officer, or senior officer is an Army, Marine, or Air Force commissioned officer senior in rank to a company officer but junior to a general officer. In most armies this corresponds to the ranks of major, lieutenant colonel and colonel, or their equivalents. Some countries also include brigadier in the definition.
Captain lieutenant or captain-lieutenant is a military rank, used in a number of navies worldwide and formerly in the British Army. It is generally equivalent to the Commonwealth or US naval rank of lieutenant, and has the NATO rank code of OF-2, though this can vary.
A subaltern is a primarily British military term for a junior officer. Literally meaning "subordinate", subaltern is used to describe commissioned officers below the rank of captain and generally comprises the various grades of lieutenant.
Military ranks of the Swedish Armed Forces shows the rank system used in the Swedish Armed Forces today, as well as changes during the 20th century due to changes in the personnel structure.
System name of Vietnamese military ranks are a relatively complete set on 22 March 1946 by President Ho Chi Minh, originally based on the military ranks system of Japanese military. Reference designs to the military ranks system of the French military. In 1958, the Vietnam People's Army military ranks system to be changed and used almost constantly since then.
Lieutenant is a junior officer rank in the British Army and Royal Marines. It ranks above second lieutenant and below captain and has a NATO ranking code of OF-1 and it is the senior subaltern rank. Unlike some armed forces which use first lieutenant, the British rank is simply lieutenant, with no ordinal attached. The rank is equivalent to that of a flying officer in the Royal Air Force (RAF). Although formerly considered senior to a Royal Navy (RN) sub-lieutenant, the British Army and Royal Navy ranks of lieutenant and sub-lieutenant are now considered to be of equivalent status. The Army rank of lieutenant has always been junior to the Navy's rank of lieutenant.
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