Combat counter-intelligence

Official War Department training film No 11.321 produced by the United States Signal Corps in collaboration with the General Staff through the co-operation of the Research Council Academy of Motion Picture Arts and Sciences. Illustrates the need not to give away any unconscious information to the enemy. Examples given are bringing cameras with previously exposed film to the front, diaries and mementoes which could have unit markings. Shows the rules of camouflage discipline to avoid detection by enemy aircraft. Ends with a sequence of ghosts of the 1914-1918 war in which they explain how loose talk got them killed. The ghosts stress not to hesitate to report any violation of secruity discipline.