WW1 British RN Navy Room 40 British Naval Intelligence 1914-18 Used Hardcover Reference Book

WW1 British RN Navy Room 40 British Naval Intelligence 1914-18 Used Hardcover Reference Book provides a detailed account of Room 40, the British Royal Navy’s key intelligence unit during the First World War. Compiled from primary sources and expert research, this reference book covers the origins, organization, and operations of Room 40 from 1914 to 1918. Room 40 played a critical role in signals intelligence, including the interception and decryption of enemy communications, which influenced major naval engagements and strategic decisions. The book examines significant personnel, methods of codebreaking, and notable incidents such as the handling of the Zimmermann Telegram. This used hardcover edition features clear text, archival photographs, and supporting documentation, making it a comprehensive resource for military historians and researchers. The material is organized chronologically and thematically, offering insight into both the technical aspects and broader historical context of wartime naval intelligence in the British Royal Navy.  Total of 338 pages.