A field officer or field grade officer is an army or marine commissioned officer senior in rank to a company officer but junior to a general officer. This article or section is in need of attention from an expert on the subject. ... A Marine is an elite warrior whose primary function is to serve aboard a ship and/or assault the land from the sea in amphibious warfare. ... In military organizations, a commissioned officer is a member of the service who derives authority directly from a sovereign power, and as such holds a commission from that power. ... In US military usage, a company officer is an US Army or US Marine commissioned officer below the rank of Major (abbreviated as MAJ): a Second Lieutenant (2LT), a (first) Lieutenant (1LT), or a Captain (CPT). ... General is a military rank, in most nations the highest rank, although some nations have the higher rank of Field Marshal. ...

Historically, a regiment or battalion's field officers made up its command element. British regiment A regiment is a military unit, consisting of a variable number of battalions - commanded by a colonel. ... Symbol of the Austrian 14th Armoured Battalion in NATO military graphic symbols A battalion is a military unit usually consisting of between two and six companies and typically commanded by a Lieutenant Colonel. ...

Today, a field officer is a major, lieutenant colonel, or a colonel. The British Army, (in which these officers are called officers of field rank, not field grade) and some others in the Commonwealth (including the Australian Army and New Zealand Army), also include the brigadier in this category: the equivalent in other armies is a general officer (the brigadier general). Major is a military rank the use of which varies according to country. ... In the U.S. Army, Air Force and Marine Corps, a lieutenant colonel is a commissioned officer superior to a major and inferior to a colonel. ... This article or section needs copy editing for grammar, style, cohesion, tone and/or spelling. ... The British Army is the land armed forces branch of the British Armed Forces. ... This article needs additional references or sources for verification. ... The Australian Army is Australias military land force. ... Ngāti Tumatauenga or New Zealand Army is the land armed force of the New Zealand military and comprises around 4,500 regular personnel and 2,500 non-regulars and civilians. ... Brigadier (IPA pronunciation: ) is a military rank, the meaning of which has a considerable variation. ... A Brigadier General, or one-star general, is the lowest rank of general officer in the United States and some other countries, ranking just above Colonel and just below Major General. ...

In the Canadian Forces, the equivalent of field officers are senior officers (French: Officiers supérieurs); they include the army and air force ranks of Major, Lieutenant-Colonel, and Colonel, and the naval ranks of Lieutenant-Commander, Commander, and Captain. The Canadian Forces (French: Forces canadiennes), abbreviated as CF (French: FC), are the unified armed forces of Canada. ... Lieutenant Commander (Lieutenant-Commander in the Royal Navy) is a commissioned officer rank in many navies superior to a Lieutenant and subordinate to a Commander. ... Commander is a military rank which is also sometimes used as a military title depending on the individual customs of a given military service. ... . Captain, is the name most often given in naval circles to the NATO rank code of OF-5. ...