A battalion is a military unit of around 300–1,300 soldiers usually consisting of between two and seven companies and typically commanded by either a Lieutenant Colonel or a Colonel. Several battalions are grouped to form a regiment or a brigade. The nomenclature varies by nationality and by branch of arms, for instance, some armies organize their infantry into battalions, but call battalion-sized cavalry, reconnaissance, or tank units a squadron or a regiment instead.
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battalion A ground force unit composed of a headquarters and two or more companies or similar units.