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The Principles of Intelligence:
The eight basic principles which govern the function, organization and operation of the combat intelligence system, from battle group through to corps level, are:
- Centralised Control
- Timeliness
- Systematic Exploitation
- Objectivity
- Accessibility
- Responsiveness
- Source Protection
- Continuous Review
B-GL-357-001/FP-001 Intelligence Field Manual

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The First World War
First World War
By 1914, the Canadian Corps of Guides totalled some 500 all ranks. Given that their mounted scout role appeared inappropriate for war in Europe, many of the personnel serving with the Corps of Guides were absorbed into existing units and formations in the Canadian Army. Others became Intelligence staff officers and NCOs serving with the British Intelligence Corps. Some continued to serve in Canada with the Canadian Corps of Guides.
The Intelligence system created within the First Canadian Division prior to its deployment to France in 1915 served as the basis for the development of Intelligence structures generally throughout the Canadian Corps. Intelligence personnel exploited reports from ground and aerial observers, patrols, aerial photography, Prisoners of War (PWs), and captured enemy documents. They conducted intelligence preparation of the battlefield activities and issued regular INTSUMs.
Cyclist Companies and Intelligence
Intelligence personnel serving with the Canadian Expeditionary Force performed infantry, liaison and reconnaissance duties in one of the five cyclist companies established - one per Division - in the Canadian Army. During the great advance of 1918, these personnel suffered numerous casualties as they attempted to keep the Canadian command in touch with rapidly changing circumstances on the battlefield. Other Intelligence officers and NCOs performed intelligence duties in HQs in the Canadian Corps, from Corps down to Brigade level. A Counter-espionage Section, known as Intelligence (b), was created in 1918 to counter the threat posed by enemy agents.
Inter-War Years
After the War, a position for a Director of Military Operations and Intelligence was maintained in the Canadian Army. Corps of Guides units in Canada were converted to cyclist companies charged with protecting the main force form surprise during time of war. After disbandment of these companies on 31 March 1929, a small staff in Ottawa and some Districts performed Intelligence duties. In 1932, Intelligence staffs of the RCAF and Army were amalgamated. A proposal in March 1938 by DMOI, Colonel Crerar, which would have led to creation of a Joint Service Intelligence Section in Ottawa, was not accepted.
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