The famous historian L.A. Bezymensky in his new book introduces the reader to the so-called “third front” of the secret diplomacy of world powers, open long before the start of World War II. On this front no shots were fired, no armies moved, but its invisible impact on the world was decisive. In his study, the author examines a very important historical period - from Operation Grün (the capture of Czechoslovakia) to the last months of World War II.