Independent company (British Army)
An independent company was originally a unit raised by the English Army, subsequently the British Army, during the 17th and 18th centuries for garrison duties in Britain and the overseas colonies. The units were not part of larger battalions or regiments, although they may have originally been detached from them, and the units would remain permanently assigned to the garrison.
Source: Wikipedia — Independent company (British Army) (CC BY-SA 4.0)