MI8

Now defunct, the British Military Intelligence section 8 in World War II was charged with aiding resistance fighters in Nazi-controlled Europe and recovering Allied troops who found themselves behind enemy lines (e.g., pilots who had been shot down).

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Also, the name temporarily applied to a cryptography effort mounted within the US Army during WWI. Herbert Yardley was assigned to this unit during the War, and after it, continued his cryptographic work during the '20s at what Yardley called the 'American Black Chamber' in his book of that name. It was jointly funded by the US Army and the State Department. There are occasional references to this operation as MI-8. When Secretary of State Stimson removed State Department funding, the operation was closed down.