by Wehrmacht (Author)
In 1942 the Wehrmacht published a training manual with the goal of countering the "silent killing" tactics used by the British commando units. The manual was - much in line with typical National Socialist terminology - titled "Abwehr Englischer Gangster-methoden" or "Defense Against English Gangster methods".
This book was compiled due the Wehrmacht intelligence operatives uncovering of a British hand-to-hand course for the SOE, Commandos, et al, on methods of quick and silent killing (undoubtedly developed by W. E. Fairbairn and E. A. Sykes). They correctly assessed that their troops in general and particularly the Geheime Staatspolizei (Gestapo), Sicherheitsdienst (SD), their security guards, and sentries would be in grave danger when confronted by men trained in these methods. This manual/program was the Wehrmacht's response.
Full English Translation