The book in popular science form tells about the emergence and military operations of the eastern legions and Cossack units that were part of the armed forces of Nazi Germany. The main place in the book is given to organization, uniforms, equipment and weapons, insignia and distinction of individual branches of the military and formations. The book is distinguished by historical accuracy, an objective approach to the events described, the breadth and novelty of the material involved, and contains many unique photographs and color illustrations. Addressed to a wide range of readers interested in military history.