This manual outlines the fundamental operational principles of the Counter Intelligence Corps (CIC) during World War II. It details the organization, administration, operation, and employment of CIC personnel, with provisions applicable to both domestic and overseas theaters of operations.

This technical manual, originally published by the War Department in 1943 and later reissued, serves as a primary source document for understanding the structure and function of the Counter Intelligence Corps during World War II. Its content provides direct insight into the operational doctrines and administrative frameworks that governed intelligence activities of the era. The manual is likely regarded as an essential reference for historians and researchers specializing in military intelligence and the Second World War.