This edition is devoted to the history of the White movement that originated in Russia after the October Revolution, in particular, it tells about the North-West Army under the command of General N.N. Yudenich. Presenting biographies of key ranks of the North-West Army and, first of all, Commander-in-Chief Nikolai Nikolayevich Yudenich, the author of the book is looking for an answer to the question: why could an experienced commander who did not know defeats in the First World War not take Petrograd, although his troops were on the very approaches to the former capital? The study was based on documents, manuscripts and other materials of domestic and foreign archives. The author of the book is the historian and public figure Nikolai Nikolaevich Rutchenko (Rutych; 1916-2013), specializing in the study of the history of Russia at the beginning of the 20th century. and the history of the White movement.