About the book: 2000 / The author talks about the participation of NKVD troops in the Great Patriotic War. Due to the secrecy of the materials, for a long time it was not known about the activities of the barrier detachments, the military barrier service, the escort of special contingents and large parties of prisoners during the mass retreat of our troops, the fight against bandit formations, and the conduct of special operations. The factual material is purely documentary, which is confirmed by archival materials on the activities NKVD troops during the events described.