It is intended as a central point of access information about British formations of that size.
In 1905, the army established a series of geographical military districts, known as "commands", to replace six army corps that had existed for a short period.
The purpose of the commands was to administer all units and formations located within their geographical borders, and if needed could be further subdivided into "areas".
In 1939, it was one of the army's six regional commands, which existed within the British Isles, on the outbreak of the Second World War.
[1][2] Its geographical area encompassed parts of the following four counties: Berkshire, Hampshire, Surrey, and Sussex.