How to Operate Behind Enemy Lines is a 1943 English-language Documentary Drama film directed by John Ford. A training film for OSS agents who are to be dropped behind enemy lines, covering cover and concealment, ambush techniques, etc. How to operate behind enemy lines features John Ford in the lead role along with an ensemble cast including Eddie Foster, Martin Garralaga, Peter Lorre, Osa Massen, Tom Quinn and Cyril Ring. Editing was done by Robert Parrish. The film has a running time of 61 minutes. Distribution rights for the movie were acquired by Field Photographic Branch.