Key term for OCR GCSE History A, used in International Relations 1918–1975.
The principle that all members of the League of Nations would act together to defend any member that was attacked, intended to make individual large armies unnecessary.
Collective security appears in OCR GCSE History A revision content for International Relations Period Study, especially International Relations 1918–1975 and Conflict and Co-operation 1918–1939.
International Relations Period Study
International Relations 1918–1975 • Conflict and Co-operation 1918–1939
International Relations Period Study
International Relations 1918–1975 • Cold War in Europe 1945–1961
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