This is a documentary history of how intelligence influenced Britain‎'‎s policy response to key 20th century events‎.‎ For more than 50 years‎,‎ the Joint Intelligence Committee ‎(‎JIC‎)‎ has been central to the secret machinery of the British Government‎,‎ acting as a broker between the realms of the spy and the policy‎-maker‎.‎ From WWII to the War in Iraq‎,‎ and from the Falklands to the IRA‎,‎ it has been involved in almost every key foreign policy decision‎.‎ These 18 case studies look at key moments in the JIC‎'‎s history‎.‎ Each case study includes a contextualising introduction‎,‎ a full reproduction of an original JIC document that influenced the government‎'‎s policy response to a particular situation and explanatory footnotes‎.‎ It features 18 case studies that pinpoint the role of intelligence in foreign and defence policy from 1936 to the present day‎.‎ It reproduces the original versions of declassified intelligence assessments and reports‎.‎ It is suitable for students and academics studying contemporary international history and government policymaking processes‎.‎