Documents of the central and local state archives of Russia, materials from foreign publications (American, English), newspaper reports of the period of the Omsk government A.V. Kolchak about his foreign policy, the nature of the intervention of the Entente powers in the Far East, their assistance to Kolchak, the reasons for the collapse of the Kolchak regime. The collection was prepared as a popular science publication. Designed for researchers and the widest readership.