Cryptanalysis of the Enigma bombes were, however, very fast and the most successful. They were extensively used by Bletchley Park over teleprinter links (using the Combined Cipher Machine) to OP-20-G for both 3-rotor and 4-rotor jobs. Although the German army, SS, police, and railway all used Enigma with similar procedures, it was the "Luftwaffe" (Air Force) that was the first and most fruitful source of Ultra intelligence during the war. The messages were decrypted in Hut 6 at Bletchley Park and turned into intelligence reports in Hut 3. The network code-named ‘Red’ at Bletchley Park was broken regularly and quickly from 22 May 1940
The Kingdom of the Netherlands During World War II The Kingdom of the Netherlands During World War II The Kingdom of the Netherlands During World War II () is the standard reference on the history of the Netherlands during World War II. The series was written by Loe de Jong (1914–2005), director of the Dutch Institute for War Documentation ("Nederlands Instituut voor Oorlogsdocumentatie", or NIOD), and was published between 1969 and 1991. The series contains 14 volumes, published in 29 parts. De Jong was commissioned to write the work in 1955 by the Ministry of Education, Culture and Science. The first volume appeared in 1969, and de Jong wrote