An overview of the birth of modern Army intelligence.

Steps to war -- The Signal Corps -- The war in Europe -- Captains -- Small steps by the Signal Corps -- The first shots in the intelligence war -- An early test south of the border -- America enters the war -- Military Intelligence Section -- The bigger picture -- A counterintelligence problem -- District of Columbia -- Corps of Intelligence Police -- Countersubversion -- The civilian sector -- The advent of Yardley -- Reports and more reports -- Censorship -- An interim judgment -- Intelligence and the AEF -- The Information Division -- A downed airship -- Secret Service Division -- Topography Division -- Censorship Division -- New Year's Eve -- Securing the home front -- Organizing counterintelligence -- Counterintelligence in action -- Intelligence gathering -- Secret inks -- More reports -- Finishing the course -- Propaganda -- Attachés -- Code making -- Negative branch -- The final report -- Tested under fire -- Intelligence in the field -- Intelligence within Division -- The Corps -- Army headquarters -- GHQ: filling the void -- Stars and stripes -- Combat artists -- Securing the force -- Making the airwaves secure -- Course of the war -- Coming to a close -- First Army -- Arrival of Van Deman -- St. Mihiel -- Meuse-Argonne -- Security -- The use of intelligence -- Peace talks -- Final evaluation -- The aftermath -- Peace conference -- Sideshows -- At home -- A glimpse into the future -- Appendix A: MI divisions in the War Department -- Appendix B: Radio tractor units -- Appendix C: G2 organization at GHQ -- Appendix D: First Army Observation/Photo Air Service -- Appendix E: First Army Signals Intelligence stations -- Appendix F: First Army Security Service monitoring stations.