Justus D. Doenecke's monumental study covers diplomatic, military, and ideological aspects of U.S. involvement as a full-scale participant in World War I. The entry of America into the "war to end all wars" in April 1917 marks one of the major turning points in the nation's history. In the span of just nineteen months, the United States sent nearly two million troops overseas, established a robust propaganda apparatus, and created...