It was only with American entry into the First World War that the United States Army made a systematic attempt to collect military intelligence. This was done at first through the expansion of the tiny military intelligence section of the War College, and later in August 1918 by the establishment of a regular division within the General Staff (G-2). By 1918 over a thousand officers and clerks were thus employed. Weekly intelligence summaries were produced from June 1917 (these fill twenty-six of the volumes under review), and in addition there were daily intelligence summaries from January 1918 until the end of April 1919, the later ones being for the use of the American Commission in Paris. Initially the summaries had been prepared for the Chief of Staff, but from the autumn of 1918 they were routinely circulated to the President and State Department. Most of the material has only recently been declassified. The daily summaries are largely military in content, but those used during the Paris conference provide information on the state of Germany and Russia with much attention being paid to the strengths and weaknesses of Bolshevism, how seriously it was to be taken as a threat, and how far it was being used by the Germans as a bogey with which to try and frighten the Allies into a lenient peace. As might be expected the weekly summaries attempt a more systematic presentation of political, social and economic as well as military developments. The value of the assembled material varies greatly in quality, much of it being speculative and drawn from unreliable sources. The information reaching G-2 was often contradictory, incomplete or speedily overtaken by events. The quality of analysis by G-2 was also variable, and was occasionally presented with almost as much concern for literary flourish and effect as elucidation. Nevertheless it is interesting to see what information and analysis from this source was laid before American policy-makers. The editor puts his finger on the chief merit of documents with his remark that these summaries are a valuable source for further research in the