Intelligence is a major and hitherto little addressed issue of modern diplomatic and strategic history. Knowing One?s Enemies fills a void in twentieth-century history by telling the story of intelligence agencies from the early nineteen-hundreds to World War II. In essays that illuminate not only the recent past but shortcomings in today?s intelligence assessments, sixteen experts show how prospective antagonists appraised each other prior to the World Wars. On the Military Intelligence Branch History Reading List 2012.