LOF meaning in Military and Defence ?

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.

Casualties in the First World War devastated the Legion of Frontiersmen, and except for a brief resurgence in the interwar period, a series of schisms and sectarianism prevented attempts to reinvigorate the movement. In the late 1930s, the Legion of Frontiersmen in Canada was formally affiliated with the Royal Canadian Mounted Police, but after a schism split within the Canadian Frontiersmen, the RCMP severed formal ties. Various Legion of Frontiersmen groups still exist throughout the Commonwealth, but as a whole, it has been unable to define its niche post World War II.