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A brigade is a major tactical military formation that is typically composed of three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division. Brigades formed into divisions are usually infantry or armored (sometimes referred to as combined arms brigades). In addition to combat units, they may include combat support units or sub-units, such as artillery and engineers, and logistic units or sub-units. Historically, such brigades have sometimes been called brigade-groups. On operations, a brigade may comprise both organic elements and attached elements, including some temporarily attached for a specific task. Brigades may also be specialized and comprise battalions of a single branch, for example cavalry, mechanized, armored, artillery, air defence, aviation, engineers, signals or logistic. Some brigades are classified as independent or separate and operate independently from the traditional division structure. The typical NATO standard brigade consists of approximately 3,200 to 5,500 troops. However, in Switzerland and Austria, the numbers could go as high as 11,000 troops. The Soviet Union, its forerunners and successors, mostly use "regiment" instead of brigade, and this was common in much of Europe until after World War II. A brigade's commander is commonly a brigadier general, brigadier or colonel. In some armies, the commander is rated as a General Officer. The brigade commander has a self-contained headquarters and staff. The principal staff officer, usually a lieutenant colonel or colonel, may be designated chief of staff, although until the late 20th century British and similar armies called the position 'brigade-major'. Some brigades may also have a deputy commander. The headquarters has a nucleus of staff officers and support (clerks, assistants and drivers) that can vary in size depending on the type of brigade. On operations, additional specialist elements may be attached. The headquarters will usually have its own communications unit. In some gendarmerie forces, brigades are the basic-level organizational unit. ==Origin== The brigade was invented as a tactical unit by the Swedish king Gustavus Adolphus. It was introduced during the Thirty Years' War to overcome the lack of coordination between normal army structure consisting of regiments by appointing a senior officer. The term derives from Italian ''brigata'', as used for example in the introduction to ''The Decameron'', where it refers only to a group of ten, or Old French ''brigare'', meaning "company" of an undefined size, which in turn derives from a Celtic root ''briga'', which means "strife." The so-called "brigada" was a well mixed unit, comprising infantry, cavalry and normally also artillery, designated for a special task. The size of such "brigada" was a reinforced "company" of up to two regiments. The "brigada" was the ancient form of the modern "task force". This was copied in France by General Turenne, who made it a permanent standing unit, requiring the creation in 1667 of a permanent rank of ''brigadier des armées du roi'' (literally translating to ''brigadier of the armies of the king''), which would in time be renamed simply ''Général de brigade'' (but would still be referred to occasionally as ''brigadier'' for short). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「brigade」の詳細全文を読む スポンサード リンク
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