UA - Unit of Action

Japanese: UA - UA/ゆーえー（英語表記）Unit of Action

This is the provisional name for the new unit organization system of the US Army, and has not been used since around 2007. Like the armies of many countries, the US Army is also shifting its basic combat unit from the division (12,000-18,000 personnel) to the brigade (around 5,000 personnel). A brigade is a basic combat unit that combines one combat regiment (2,500-3,000 personnel) with support units such as communications, reconnaissance, medical, and supply units. Although it is smaller than a division, it can operate independently just like a division. This brigade is called a "Unit of Action (UA)," and as a higher command organization that brings together several brigades, a "Unit of Employment X (UEX)" and a higher organization, a "Unit of Employment Y (UEY)," are organized as necessary. A corps with two or more divisions is equivalent to a UEX, and an army with several corps is equivalent to a UEY. After formation, UA will take on the name of an existing brigade or division, UEX will take on the name of a corps, and UEY will take on the name of an army. 18 to 21 UEXs will be formed, and they will have headquarters structures in peacetime and specific UAs will be assigned to them, but they do not always act as a unified UEX. There are 960 headquarters personnel, and the commander is usually a major general, but a lieutenant general will be appointed when stationed overseas for a long period of time. The United States has notified Japan of its intention to set up the UEX headquarters at Camp Zama in Kanagawa Prefecture and prepare for emergency deployment in Asia, and the Japanese government has agreed to accept it. UEYs are responsible for specific theaters, and the formation of five UEYs for North America, South America, the Middle East, Asia, and Europe/Africa is being considered. There are 1,120 headquarters personnel.

(Kensuke Ebata, Visiting Professor at the Institute of International Studies, Takushoku University / 2008)

Source : "Chiezo" published by Asahi Shimbun Publications Co., Ltd. About Chiezo

Japanese:

米陸軍の新しい部隊編制方式の仮称で、2007年ごろからは使用されなくなった。多くの国の陸軍と同様、米陸軍も基本戦闘単位を師団(division:1万2000〜1万8000人)から旅団(brigade:5000人前後)に移行しつつある。旅団は1個戦闘連隊(2500〜3000人)を中心に、通信、偵察、医療、補給などの支援部隊を組み合わせた基本戦闘単位で、師団よりは小型だが、師団と同様に独立作戦が可能。この旅団が「ユニット・オブ・アクション(UA)」とされ、数個旅団を束ねる上部指揮組織として「ユニット・オブ・エンプロイメントX(UEX)」、さらにその上の組織として「ユニット・オブ・エンプロイメントY(UEY)」が必要に応じて編成される。従来の2個師団以上を束ねる軍団(Corps)がUEX、数個軍団を束ねる軍(Army)がUEYに相当するが、編成後はUAが既存の旅団や師団、UEXが軍団、UEYが軍の名称を継承する。UEX(軍団)は18〜21個が編成され、平時から司令部機構を持ち、特定のUAが配属されるが、常にUEXとしてまとまって行動するものではない。司令部要員は960人で、司令官は通常は少将だが、外国に長期駐留する場合には中将が任命される。米国は神奈川県のキャンプ座間にUEX司令部を置いて、アジア方面の有事展開に備える方針を日本側に通告、日本政府も受け入れに合意した。UEY(軍)は特定戦域を担当し、北米、南米、中東、アジア、欧州・アフリカ向け5個UEYの編成が検討されている。司令部要員は1120人。

(江畑謙介拓殖大学海外事情研究所客員教授／ 2008年)

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