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American Signal Intelligence in Northwest Africa and Western Europe by George F. Howe

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Chapter 9. The Forming of Signal Intelligence Service, ETOUSA

Derivation and Beginnings

The formation of SIS, ETOUSA, reflected both the early organizational concept of the SIS, War Department, and the experience gained overseas, particularly in the Mediterranean. When the United States became a belligerent in December 1941, both Army and Navy SIGINT centers in Washington operated in buildings of World War I vintage situated on lower Constitution Avenue and backing on Potomac Park. (Both structures survived until after the Korean conflict.) To cope with wartime requirements, each center moved to larger quarters which could be better segregated from non-SIGINT personnel of the same armed service. Each acquired a girls' private school: the Army – ...

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