German code breaking in World War II German code breaking in World War II German code breaking in World War II achieved some notable successes cracking British Naval ciphers until well into the fourth year of the war, but also suffered from a problem typical of the German armed forces of the time: numerous branches and institutions maintained their own cryptographic departments, working on their own without collaboration or sharing results with equivalent units. This led to duplicated effort, to a fragmentation of potential, and to lower efficiency than might have been achieved. There was no central German cryptography agency comparable to the British Bletchley Park facility.
The Kingdom of the Netherlands During World War II volume 7 how his family fared during the war, and reflected on his family's history in volume 12. 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