The agent group known as the 'Red Orchestra' is considered one of the most significant espionage networks of World War II. However, according to the research and source studies by Roewer, several common misconceptions need to be corrected. The author sheds light on the incorrect assumption by Stalin that Hitler would not attack in the summer of 1941 and examines the extent to which the military strategies of both sides - the German and the Soviet - were truly influenced by Soviet espionage networks like the 'Red Orchestra.' Was the role of the espionage locations in Switzerland and Sweden, as well as the agents supplying them from the 'Führer Headquarters,' actually decisive for the war? Roewer's new work on the 'Red Orchestra' fundamentally questions the findings of previous publications and casts a completely new light on the history of intelligence services during World War II. Much of what has been written about the activities of the 'Red Orchestra' (including by historians) will have to be regarded as mystifications in the future. An indispensable work on the history of espionage in World War II.