A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports: Naval Headlines; and a ULTRA message from Tokyo to Manila on March 1 referring to a Japanese convoy of six tankers being attacked by enemy submarines on February 20 north-west of the Philippines.
- Collection ID
- HW1
- Conflict
- Second World War
- Countries
- Iceland Japan Philippines Singapore
- Document Reference
- HW1 /2594/2
- Document Types
- Intelligence Report
- File Reference
- HW1 /2594
- Identifier
- 10.1080/swwf.hw1.2594.002
- Keywords
- Japanese Navy Shipping Naval Warfare Submarines Shipping Losses Naval Intelligence Battle Of The Atlantic Convoys German U-boats Military Commanders Warships Mechanical Problems
- Languages
- English
- Organizations
- Government Code and Cypher School
- Pages
- 4
- Published in
- United Kingdom
- Themes
- Military Intelligence
