The Legion of Frontiersmen is a civilian organisation formed in Britain in 1905 by Roger Pocock, a former constable with the North-West Mounted Police and Boer War veteran. Prompted by fears of an impending invasion of Britain and the Empire, the organisation was founded to be a field intelligence corps that would watch over and protect the boundaries of the Empire. Headquartered in London, the Legion of Frontiersmen formed branches throughout the Empire to prepare enlistees for war and to foster vigilance in peacetime. Despite efforts, the Legion never achieved significant official recognition; in part because many Commonwealth nations' laws prohibit militia groups.