A regiment is a military unit, composed of variable numbers of battalions, commanded by a Colonel or, as in the case of the modern British Army where colonels more often serve as staff officers rather than field commanders, a Lieutenant Colonel. A regiment can be broken into two distinct categories, one being an administrative unit which is responsible for non-operational management of battalions (such as human resources, training and strategic reserve), while the other being a deployable combat arm varying from a battalion to a brigade sized formation, usually with organic supply and support. Depending on the nation, military branch, mission, and organization, a modern combat regiment resembles a brigade, in that both range in size from a few hundred to 5,000 soldiers (3 to 7 standard battalions).
