The Army command structure is hierachical with Commander Field Army and Commander Regional Forces controlling groupings of units based around Divisions and their Brigades.
Within these Brigades are Major Units, regiment or battalion-sized and Minor Units, smaller company sized sub-units or platoons.
All units within the service are either Regular (full-time) or Territorial Army (part-time), or a combination with sub-units of each type.
Army Medical Services - RAMC, RADC, QARANC and RAVC
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The Territorial Army is part of Britain's reserve land forces. Together with the Regular Reserve the TA provides support to the Regular Army at home and overseas.