Abwehr, SD, Gestapo - although these abbreviations, which once terrified the whole of Europe, are known to everyone, the history of the intelligence services of the Third Reich is still full of secrets, myths and “black spots”. To this day, new information about their crimes continues to arrive, new details of secret operations and complex multi-move intelligence games - and only in recent years, when disparate fragments finally begin to take shape into a single whole, the true scale of their activities and the extent to which they entangled the whole world in a dense network, how strong and dangerous was the enemy, which our grandfathers and great-grandfathers defeated 65 years ago. This book will allow you to look into the “holy of holies” of Hitler’s special services - not only well-known, but also top-secret structures, the existence of which is often Even the Nazi bosses - Forschungsam (radio interception service), Chiffrierabteilung (Cypher Center), Ausland Organization-AO ("Foreign Organization of the NSDAP") were not suspicious. This encyclopedia will take you through the labyrinths of the most secret operations of the Third Reich - such as numerous assassination attempts on Stalin and the provocation in Gleiwitz, which served as the reason for the outbreak of World War II, breaking the codes of the American military attaché and the British Navy, and many others.