At the very beginning of the 20th century, the army of Nicholas II, and then the Provisional Government of Kerensky, fought on Persian soil. She fought until the first half of 1918, when the Civil War was already beginning in Soviet Russia. These are little-known, almost ignored by domestic historians of war. They are called differently: "unknown Persian wars," "secret Persian expeditions," "Persian front." This book is dedicated to unknown campaigns in Persia.